Accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Equity in undistributed (in excess of) net income of subsidiaries Distributions Less than in Excess of Net Income (Loss) of Subsidiaries [Abstract] . Employee Stock Purchase Plan Employee Stock Purchase Plan [Member] Employee Stock Purchase Plan Accrued vacation Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities Weighted average grant date fair value per share (in dollars per share) Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instruments, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instruments, Weighted Average Grant Date Fair Value Increase (decrease) in interest income on swap transactions Interest Income, Interest-Earning Asset, Increase (Decrease) Award Timing Predetermined Award Timing Predetermined [Flag] Fair value of financial assets acquired Fair value of PCD financial assets Business Combination, Recognized Asset Acquired, Financial Asset Amortization of investments in tax-advantaged projects Investment Program, Proportional Amortization Method, Applied, Amortization Expense Entity File Number Entity File Number Additional Paid-in Capital Additional Paid-in Capital [Member] Issuance of treasury stock for the ESPP Proceeds from issuance of treasury stock for the 2021 ESPP Proceeds from Issuance of Treasury Stock for Employee Stock Purchase Program The cash inflow from the issuance of an equity stock for employee stock purchase program that has been previously reacquired by the entity. Income tax credits and other tax benefits Investment Program, Proportional Amortization Method, Elected, Income Tax Credit Tabular List, Table Tabular List [Table Text Block] CrossFirst CrossFirst [Member] CrossFirst Interest-bearing transaction deposits Interest bearing transaction deposits The aggregate amount of all domestic and foreign interest-bearing transaction deposits liabilities held by the entity. Impact of Recently Adopted Accounting Standards and Recently Issued Accounting Standards Not Yet Adopted New Accounting Pronouncements, Policy [Policy Text Block] Finance lease costs: Finance Lease, Liability [Abstract] Schedule of the Analysis of the Changes in Loans to Related Parties Schedule of Related Party Transactions [Table Text Block] Schedule of Estimated Fair Values of Financial Instruments Fair Value, by Balance Sheet Grouping [Table Text Block] Goodwill and other intangibles assets Goodwill [Line Items] Condensed Cash Flow Statement [Table] Condensed Cash Flow Statement [Table] Measurement Basis [Axis] Measurement Basis [Axis] Adjustment to Compensation: Adjustment to Compensation [Axis] 12 months or more Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value TRANSACTIONS WITH RELATED PARTIES Related Party Transactions Disclosure [Text Block] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Amortization of unrecognized losses on securities transferred to held to maturity OCI, Debt Securities, Available-for-Sale, Transfer to Held-to-Maturity, Adjustment from AOCI for Amortization of Gain (Loss), before Tax Stock-based compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-Based Compensation Cost Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Debt securities held to maturity Debt Securities, Held-to-Maturity, Maturity [Abstract] Recoveries Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery Consideration paid Business Combination, Consideration Transferred [Abstract] Stock, Class of Stock [Table] Stock, Class of Stock [Table] Busey Awards Busey Awards [Member] Busey Awards Due after ten years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Amortized Cost Issuance of treasury stock for ESPP (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Minimum Capital Requirement Banking Regulation, Common Equity Tier 1 Risk-Based Capital Ratio, Capital Adequacy, Minimum Due after one year through five years Debt Securities, Held-to-Maturity, Amortized Cost Excluding Accrued Interest, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year One through Five Watch Watch Represents the grade which includes loans on management's watch list and that is intended to be utilized on a temporary basis for a pass grade borrower where a significant risk-modifying action is anticipated in the near future. Adjustment to Compensation, Amount Adjustment to Compensation Amount (Increase) decrease in other assets Increase (Decrease) in Other Operating Assets Stock-based compensation Stock-based compensation Share-Based Payment Arrangement, Noncash Expense Payment Deferral and Extended Maturity Payment Deferral And Extended Maturity [Member] Payment Deferral And Extended Maturity Stock dividend equivalents on RSUs/PSUs/DSUs Stock Issued During Period, Value, Dividend Equivalent Stock Issued During Period, Value, Dividend Equivalent Notional Amount Derivative Asset, Notional Amount Stock options Options Share-Based Payment Arrangement, Option [Member] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Realized net gains (losses) on securities Debt and Equity Securities, Realized Gain (Loss) Effective Income Tax Rate Reconciliation, Percent [Abstract] Effective Income Tax Rate Reconciliation, Percent [Abstract] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Cash dividends common stock Dividends, Common Stock, Cash Total stockholders’ equity Beginning balance Ending balance Equity, Attributable to Parent Measurement Frequency [Axis] Measurement Frequency [Axis] Debt Securities, Available-for-Sale [Table] Debt Securities, Available-for-Sale [Table] Insider Trading Policies and Procedures [Line Items] Schedule of Premises and Equipment and Depreciation Expenses Property, Plant and Equipment [Table Text Block] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Bank property held for sale with impairment Bank Property Held for Sale, Fair Value Disclosure The fair value of bank property held for sale. Organization and Nature of Operations Nature of Operations [Policy Text Block] Disclosure of accounting policy for nature of operations. Financial assets Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Issuance of preferred stock, net of issuance costs (in shares) Stock Issued During Period, Shares, New Issues Fair Value, Recurring Fair Value, Recurring [Member] Fair Value Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value Employer matching contribution, percent of next match Defined Contribution Plan, Second Employer Matching Contribution, Percent of Second Match Defined Contribution Plan, Second Employer Matching Contribution, Percent of Second Match Minimum To Be Well Capitalized Banking Regulation, Tier 1 Leverage Capital, Well Capitalized, Minimum Liabilities and stockholders’ equity Liabilities and stockholders' equity Liabilities and Equity [Abstract] Gross aggregate fair value of swap assets Cash Flow Hedge Derivative Instrument Assets at Fair Value State and Local Jurisdiction State and Local Jurisdiction [Member] Minimum To Be Well Capitalized Banking Regulation, Common Equity Tier 1 Risk-Based Capital, Well Capitalized, Minimum Deposits Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Deposits Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Deposits Cover [Abstract] Cover [Abstract] Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Maximum Maximum [Member] OREO and other repossessed assets acquired in settlement of loans Real Estate Owned, Transfer to Real Estate Owned Debt securities held to maturity Amortized Cost Debt Securities, Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss Exercisable at end of year (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Useful life Finite-Lived Intangible Asset, Useful Life Total estimated amortization expense Finite-Lived Intangible Assets, Net Total Debt securities with gross unrealized or unrecognized losses, fair value Debt Securities, Available-for-Sale, Unrealized Loss Position Minimum To Be Well Capitalized Banking Regulation, Tier 1 Risk-Based Capital, Well Capitalized, Minimum Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Unfunded investment obligations Investment-related Liabilities Junior subordinated debt owed to unconsolidated trusts Long-term debt Debt Instrument [Line Items] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Off-Balance Sheet Arrangements Off-Balance-Sheet Credit Exposure, Policy [Policy Text Block] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Additions, transfers from loans and assumed in acquisitions Real Estate Owned, Including Acquisitions, Transfer To Real Estate Owned Real Estate Owned, Including Acquisitions, Transfer To Real Estate Owned Financing Receivable, Credit Quality Indicator [Table] Financing Receivable, Credit Quality Indicator [Table] Debt securities, available for sale, sold Debt Securities, Available-for-Sale, Sold at Par Value Measurement Input, Comparability Adjustment Measurement Input, Comparability Adjustment [Member] Series B Preferred Stock Series B Preferred Stock [Member] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Other assets Other Assets [Member] Net income per share calculations for basic and diluted methods Earnings Per Share, Basic and Diluted EPS [Abstract] Earnings Per Share, Basic and Diluted EPS Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Weighted Average Term Extension Financing Receivable, Modified, Weighted Average Term Increase from Modification Target level of performance percentage Achieved Target Level Of Performance Percentage Achieved Target Level Of Performance Percentage Income before income taxes Income (loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Actual Banking Regulation, Tier 1 Leverage Capital Ratio, Actual Non-bank Dividend Income Operating Non Banking Subsidiaries Represents the earned dividend income from nonbank subsidiaries to the holding company. Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Proceeds from disposition of premises and equipment Proceeds from Sale of Property, Plant, and Equipment Amortization of mortgage servicing rights Amortization of Mortgage Servicing Rights (MSRs) Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Operating Segments Operating Segments [Member] Schedule of Income Tax Payments Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Unrealized losses on securities available for sale, net Deferred Tax Asset, Debt Securities, Available-for-Sale, Unrealized Loss Total interest expense Interest expense Interest Expense, Operating Income (loss) before equity in undistributed (in excess of) net income of subsidiaries Income (Loss) from Continuing Operations before Distribution from Subsidiaries Represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income taxes, but before distribution to subsidiaries. Assumed in acquisition Fair Value, Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Asset, Assumed In Acquisition Fair Value, Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Asset, Assumed In Acquisition Interest expense Finance Lease, Interest Expense Modifications based on CrossFirst acquisition (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Modifications In Period, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Modifications In Period, Weighted Average Grant Date Fair Value Document Fiscal Period Focus Document Fiscal Period Focus Award Timing Method Award Timing Method [Text Block] Non-accrual Financing Receivable, Excluding Accrued Interest, Nonaccrual Award Type [Axis] Award Type [Axis] Hedging Relationship [Domain] Hedging Relationship [Domain] Parent Company Parent Company [Member] Schedule of Pro Forma Information Business Combination, Pro Forma Information [Table Text Block] Transfers of Financial Assets Transfers and Servicing of Financial Assets, Transfers of Financial Assets, Policy [Policy Text Block] Investment, Name [Domain] Investment, Name [Domain] Stock-Based Compensation Share-Based Payment Arrangement [Policy Text Block] Trading Symbol Trading Symbol 2029 Lessee, Operating Lease, Liability, to be Paid, Year Four Business Combinations Business Combination [Policy Text Block] Non-taxable interest income Interest Income, Securities, Operating, Tax Exempt Business Combination, Contingent Consideration [Table] Business Combination, Contingent Consideration [Table] Entity Address, City or Town Entity Address, City or Town Finance leases Finance Lease, Weighted Average Discount Rate, Percent FirsTech FirsTech This member stands for FirsTech. Restricted bank stock Federal Home Loan Bank Stock and Federal Reserve Bank Stock Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] Total deferred tax assets Deferred Tax Assets, Net of Valuation Allowance Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Statement of Income Location, Balance [Domain] Statement of Income Location, Balance [Domain] ACL recorded for estimated uncollectible contractual cash flows specific to PCD financial assets Business Combination, Acquired Receivable, Purchased without Credit Deterioration, Contractual Cash Flow, Estimated Uncollectible RSU awards Restricted Stock Units (RSUs) [Member] Total time deposits with a minimum denomination that meets or exceeds the FDIC insurance limit of $250,000 Time Deposits, at or Above FDIC Insurance Limit Allowance for Credit Losses and Assets Purchased with Credit Deterioration Credit Loss, Financial Instrument [Policy Text Block] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Total consideration paid Business Combination, Consideration Transferred Entity Emerging Growth Company Entity Emerging Growth Company Actual Banking Regulation, Common Equity Tier 1 Risk-Based Capital Ratio, Actual Net occupancy expense of premises Occupancy Net [Member] Occupancy Net Finance leases Finance Lease, Weighted Average Remaining Lease Term Cash pledged to secure obligations Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset Outstanding at beginning of year (in shares) Outstanding at end of year (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number PARENT COMPANY ONLY FINANCIAL INFORMATION Condensed Financial Information of Parent Company Only Disclosure [Text Block] Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Noninterest income Revenue from Contract with Customer, Including Assessed Tax Total unamortized debt issuance costs Debt Issuance Costs, Net Unrealized gains (losses) on cash flow hedges, net of tax Net change in fair value of interest rate swaps Net gains (losses) on mortgage banking derivatives Derivative, Gain (Loss) on Derivative, Net New markets tax credits Effective Income Tax Rate Reconciliation, New Market Tax Credits, Percent Effective Income Tax Rate Reconciliation, New Market Tax Credits, Percent Restricted cash and cash equivalents Restricted Cash and Cash Equivalent Bankers’ Bank of the West Bancorp, Inc. bank stock Bankers’ Bank Of The West Bancorp, Inc Bank Stock Bankers’ Bank Of The West Bancorp, Inc Bank Stock Total noninterest income Noninterest Income Less: Amounts representing interest Finance Lease, Liability, Undiscounted Excess Amount Common shares outstanding (in shares) Common Stock, Shares, Outstanding Depositary Shares, each representing a 1/40th interest in a share of 8.25% Fixed-Rate Series B Non-Cumulative Perpetual Preferred Stock, $0.001 par value Depositary Shares, each representing a 1/40th interest in a share of 8.25% Fixed-Rate Series B Non-Cumulative Perpetual Preferred Stock, $0.001 par value [Member] Depositary Shares, each representing a 1/40th interest in a share of 8.25% Fixed-Rate Series B Non-Cumulative Perpetual Preferred Stock, $0.001 par value Unrealized gain on equity securities Deferred Tax Liabilities, Unrealized Gains on Equity Securities Amount of deferred tax liability attributable to taxable temporary differences from unrealized gains on equity securities. Unrecognized gross losses Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss Noninterest expense Noninterest Expense [Abstract] Cash and due from banks Cash and Due from Banks Class of Financing Receivable [Domain] Class of Financing Receivable [Domain] Assets under care Customer Assets Held in Trust Assets under care held for customers, that are not included in the Company's consolidated financial statements. Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Due after one year through five years Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five Weighted Average Interest Rate Reduction Financing Receivable, Modified, Weighted Average Interest Rate Decrease from Modification Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Pledged Status [Domain] Pledged Status [Domain] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Interest income Interest and Dividend Income, Securities, Operating Income taxes Income taxes Income tax benefit Income Tax Expense (Benefit) Floating interest rate margin Debt Instrument, Basis Spread on Variable Rate Tax effect Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax Other assets Other Assets Beginning Balance Ending Balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Document Information [Line Items] Document Information [Line Items] Thereafter Time Deposit Maturities, after Year Five Preferred shares issued (in shares) Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Designated as Hedging Instrument Designated as Hedging Instrument [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Hedging Relationship [Axis] Hedging Relationship [Axis] Net change in unrealized gains (losses) on cash flow hedges Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Conversion of Busey ROATCE PSUs to RSUs (in shares) Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Conversion Of PSUs To RSUs In Period Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Conversion Of PSUs To RSUs In Period Due in one year or less Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Total Available for Sale and Held to Maturity, Debt Securities in Unrealized Loss Position [Abstract] N/A STATEMENTS OF CASH FLOWS Condensed Cash Flow Statements, Captions [Line Items] Proceeds from the redemption of restricted bank stock Proceeds From Redemption Of Federal Home Loan Bank And Federal Reserve Bank Stock Proceeds From Redemption Of Federal Home Loan Bank And Federal Reserve Bank Stock Wealth management fees Asset Management [Member] Balances carried in AOCI Balances carried in AOCI [Abstract] na Treasury Stock Stockholders' Equity, Policy [Policy Text Block] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Tier 1 Capital to Risk Weighted Assets, Amount Banking Regulation, Tier 1 Risk-Based Capital [Abstract] Goodwill acquired during the period Goodwill, Acquired During Period (Gain) loss reclassified from OCI to interest income, net of tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification to Interest Income, before Tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification to Interest Income, after Tax Outstanding at beginning of period (in dollars per share) Outstanding at ending of period (in dollars per share) Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Weighted Average Exercise Price Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Weighted Average Exercise Price Accumulated depreciation and amortization Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, Accumulated Depreciation and Amortization Adjustment to the initial provision for unfunded commitments Business Combination, Acquisition-Related Cost, Expense, Adjustment Business Combination, Acquisition-Related Cost, Expense, Adjustment Net cash received in acquisitions (see Note 2) Payments to Acquire Businesses, Net of Cash Acquired Federal Income Tax Paid, Federal, after Refund Received Buildings and improvements Building and Building Improvements [Member] All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Regulatory Capital Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] Tax-exempt interest, net Effective Income Tax Rate Reconciliation, Tax Exempt Income, Percent Dividends on preferred stock Preferred Stock Dividends, Income Statement Impact Other service charges on deposit accounts Other Service Charges On Deposit Accounts [Member] Other Service Charges On Deposit Accounts Other Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Deferred tax liabilities: Deferred Tax Liabilities, Gross [Abstract] Other noninterest income Other income Noninterest Income, Other Operating Income Non-vested at beginning of period (in shares) Non-vested at end of period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Unrecognized stock-based compensation expense Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Proceeds from the sale of mortgage servicing rights Proceeds From Sale Of Mortgage Servicing Rights (MSR), Operating Activities Proceeds From Sale Of Mortgage Servicing Rights (MSR), Operating Activities Maximum period to defer payment of interest on the notes and, therefore, distributions on the trust preferred securities Maximum Period to Defer Interest on Debt Instrument and Distributions on Trust Preferred Securities Represents the maximum period during which the entity has the right to defer payment of interest on the debt instrument and distributions on the trust preferred securities. Repayment of short-term borrowings Repayments of Short-Term Debt Unrealized (gains) losses recognized on equity securities, net Increase (Decrease) in Equity Securities, FV-NI Total commitments Fair Value Disclosure, off-Balance-Sheet Risks, Face Amount, Liability Effective Income Tax Rate Reconciliation [Table] Effective Income Tax Rate Reconciliation [Table] Proceeds from sales of debt securities available for sale Proceeds from Sale of Debt Securities, Available-for-Sale Debt securities available for sale Fair Value Fair Value Debt Securities, Available-for-Sale, Excluding Accrued Interest Sales Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales Estimated Useful Life Property, Plant and Equipment, Useful Life Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Net interest income Net interest income Interest Income (Expense), Operating Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] PEO Total Compensation Amount PEO Total Compensation Amount Depreciation and amortization Depreciation Actual Banking Regulation, Tier 1 Risk-Based Capital, Actual Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Transfer of loans held for sale to portfolio loans Loan, Transfer from Held-for-Sale to Held-in-Portfolio 2029 Finance Lease, Liability, to be Paid, Year Four Assets acquired Business Combination, Recognized Asset Acquired, Asset [Abstract] Debt, weighted average maturity period Debt, Weighted Average Maturity Period Debt, Weighted Average Maturity Period Equity Components [Axis] Equity Components [Axis] OREO Real Estate Properties [Line Items] Real Estate Properties [Line Items] 2022 2021 Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year Premises and equipment Property, Plant and Equipment [Line Items] Standby letters of credit Standby Letters of Credit [Member] Bank owned life insurance accrued liability Life Settlement Contracts, Fair Value Method, Face Value Payment technology solutions Technology Service [Member] Schedule of Contractual Amount of Exposure to Off-Balance-Sheet Risk Schedule of Contractual Amount of Exposure to Off Balance Sheet Risk [Table Text Block] Tabular disclosure of contractual amount of exposure to off-balance-sheet risk, wherein exposure to credit loss is represented by the contractual amount of those commitments. Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Number of reportable segments Number of Reportable Segments Commercial Commercial Real Estate [Member] Entity Address, State or Province Entity Address, State or Province Financing cash flows from finance leases Finance Lease, Principal Payments Substandard Substandard [Member] Total interest income Interest and Dividend Income, Operating Financial Asset, Aging [Domain] Financial Asset, Aging [Domain] Special Mention Special Mention [Member] Impairment of leases Operating Lease, Impairment Loss Antidilutive Security, Excluded EPS Calculation [Table] Antidilutive Security, Excluded EPS Calculation [Table] Schedule of Carrying Amount of Amortized Intangible Assets Schedule of Finite Lived Intangible Assets and Future Amortization Expense [Table Text Block] Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment and the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. Lease liabilities: Lease Liabilities [Abstract] Lease Liabilities Risk participation agreements sold Risk Participation Agreement Sold [Member] Risk Participation Agreement Sold Individual: Individual [Axis] Total 401(k) Plan expenses Defined Contribution Plan, Cost Premises and equipment, gross Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, before Accumulated Depreciation and Amortization Rents to be received Lessor, Operating Lease, Payment to be Received, Fiscal Year Maturity [Abstract] Income Tax Jurisdiction [Domain] Income Tax Jurisdiction [Domain] Modifications based on CrossFirst acquisition (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Modifications In Period Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Modifications In Period Right of use assets obtained in exchange for finance lease liabilities Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Schedule of Share-Based Payment Arrangement, Stock Appreciation Right, Activity Share-Based Payment Arrangement, Stock Appreciation Right, Activity [Table Text Block] Document Annual Report Document Annual Report Interchange expense Interchange Expense Amount of interchange expenses incurred during the period. Weighted- Average Remaining Contractual Term Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Weighted Average Remaining Contractual Terms Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Weighted Average Remaining Contractual Terms Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Repayments of borrowings Repayments of Long-Term Debt Minimum Capital Requirement Banking Regulation, Tier 1 Risk-Based Capital, Capital Adequacy, Minimum Entity Interactive Data Current Entity Interactive Data Current Condensed Income Statement [Table] Condensed Income Statement [Table] Financing Receivable, Modified [Line Items] Financing Receivable, Modified [Line Items] Net gain (loss) on sales Gains (Losses) on Sales of Other Real Estate Revenue Revenue from Contract with Customer [Policy Text Block] Fair value adjustments Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deferred Tax Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deferred Tax Interest income Interest and Dividend Income, Operating [Abstract] Intrinsic value, exercisable at end of year Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value Loan Servicing Transfers and Servicing of Financial Assets, Servicing of Financial Assets, Policy [Policy Text Block] Compensation Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-Based Payment Arrangement, Amount Total noninterest expense Noninterest Expense Payment Deferral Payment Deferral [Member] Count of debt securities Total Count Of Debt Securities, Available For Sale Securities Total count of available for sale debt securities. Deposits Interest Expense, Deposits Long-Lived Tangible Asset [Axis] Long-Lived Tangible Asset [Axis] Noninterest income Noninterest Income [Abstract] Replacement of CrossFirst SSARs (in dollars per share) Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instruments, Replacement Of CrossFirst SSARs In Period, Weighted Average Exercise Price Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instruments, Replacement Of CrossFirst SSARs In Period, Weighted Average Exercise Price Unfunded investment obligations Unfunded investments Represents unfunded investments. Other liabilities Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Other Liabilities Amount of other liabilities assumed at the acquisition date. 2027 Finance Lease, Liability, to be Paid, Year Two Schedule of Future Minimum Lease Payments to be Received Lessor, Operating Lease, Payment to be Received, Maturity [Table Text Block] (Gain) loss on life insurance proceeds Gain Loss on Life Insurance Proceeds Amount of gain (loss) recognized in settlement of life insurance. Goodwill and Other Intangibles Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Noninterest expense Non-interest expense Primary financial statement caption encompassing noninterest expense. Shares received for each share owned (in shares) Business Combination, Shares Received For Each Share Owned Business Combination, Shares Received For Each Share Owned Net increase (decrease) in federal funds purchased and securities sold under agreements to repurchase Increase (Decrease) in Federal Funds Purchased and Securities Sold under Agreements to Repurchase, Net Schedule of Unamortized Stock-based Compensation Expense Share-Based Payment Arrangement, Nonvested Award, Cost [Table Text Block] Entity Central Index Key Entity Central Index Key PEO Name PEO Name Revenue Total operating income Revenues Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Estimated fair values of financial instruments Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Schedule of Risk Grades Segregated by Category and Class of Portfolio Loans Financing Receivable Credit Quality Indicators [Table Text Block] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Land and improvements Land and Land Improvements [Member] Mortgage loans originated for sale Payment for Origination, Loan, Mortgage, Held-for-Sale Deferred Income Taxes and Other Assets [Abstract] Deferred Income Taxes and Other Assets [Abstract] Minimum Capital Requirement Banking Regulation, Tier 1 Leverage Capital, Capital Adequacy, Minimum Noninterest-bearing Noninterest-bearing demand deposits Noninterest-Bearing Deposit Liabilities Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Fair Values of Derivative Assets and Liabilities Recorded in Consolidated Balance Sheet Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Vesting period Defined Contribution Plan Vesting Period Represents the period during which the rights of the participants vest under the defined contribution plans. Exercise Price Award Exercise Price Entity Filer Category Entity Filer Category Minimum Capital Requirement Banking Regulation, Tier 1 Risk-Based Capital Ratio, Capital Adequacy, Minimum Class of Stock [Domain] Class of Stock [Domain] Income taxes at federal statutory rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Common Equity Tier 1 Capital to Risk Weighted Assets, Ratio Common Equity Risk Based Ratios [Abstract] No definition available. Profit-sharing expenses Profit Sharing Expense [Member] Profit Sharing Expense Unrecognized Gains (Losses) on Debt Securities Held to Maturity AOCI, Accumulated Gain (Loss), Debt Securities, Held-To-Maturity, Parent [Member] AOCI, Accumulated Gain (Loss), Debt Securities, Held-To-Maturity, Parent Short-term borrowings, mature period Federal Funds Maturity Period Period of time between issuance and maturity of federal funds, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Statement of Financial Position Location, Balance [Axis] Statement of Financial Position Location, Balance [Axis] 2028 Finite-Lived Intangible Asset, Expected Amortization, Year Three Total OREO OREO and other repossessed assets with subsequent impairment Real Estate Acquired Through Foreclosure Income from (expense for) OREO and other repossessed assets Foreclosed Assets Gains (Losses) Foreclosed Assets Gains (Losses) Net issuance of treasury stock for warrants exercised (in shares) Stock Issued During Period, Warrants Exercised, Net of Shares Redeemed and Tax, Shares Stock Issued During Period, Warrants Exercised, Net of Shares Redeemed and Tax, Shares Intangible assets, gross Finite-Lived Intangible Assets, Gross Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Number of states in which entity operates Number of States in which Entity Operates Entity Address, Address Line One Entity Address, Address Line One Income tax examination, number of lawsuits filed Income Tax Examination, Number Of Lawsuits Filed Income Tax Examination, Number Of Lawsuits Filed Loans Held for Sale Financing Receivable, Held-for-Sale [Policy Text Block] Total, gross write-offs Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss Write off Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss Write off AOCI Total AOCI Attributable to Parent [Member] Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] DERIVATIVE FINANCIAL INSTRUMENTS Derivative Instruments and Hedging Activities Disclosure [Text Block] Schedule of Preferred Stock Issuances Schedule of Stock by Class [Table Text Block] Other liabilities Other Liabilities [Member] Fair Value as of Grant Date Award Grant Date Fair Value Realized gains and losses on debt securities Debt Securities, Available-for-Sale, Realized Gain (Loss) [Abstract] Operating loss carryforwards Operating Loss Carryforwards 2021 2020 Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year Schedule Of Share-Based Payment Award, Stock Appreciation Rights, Valuation Assumptions Schedule Of Share-Based Payment Award, Stock Appreciation Rights, Valuation Assumptions [Table Text Block] Schedule Of Share-Based Payment Award, Stock Appreciation Rights, Valuation Assumptions Schedule of Long-Term Debt Schedule of Long-Term Debt Instruments [Table Text Block] Salaries, wages, and employee benefits Salaries, wages, and employee benefits Labor and Related Expense Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Minimum Capital Requirement Banking Regulation, Tier 1 Leverage Capital Ratio, Capital Adequacy, Minimum Title and Position [Domain] Title and Position [Domain] Total unamortized stock-based compensation Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Subordinated notes, net of unamortized issuance costs Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Noncurrent Liabilities, Subordinated Notes Net Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Noncurrent Liabilities, Subordinated Notes Net Transactions with Related Parties Related Party Transaction [Line Items] Employee Benefit Plans Employee Benefit Plans Employee Benefit Plans Less than 12 months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Loans evaluated individually, net of related allowance Financing Receivable, Measurement Input Financing Receivable, Measurement Input Nonemployee Directors Nonemployee Directors [Member] Nonemployee Directors Actual Banking Regulation, Tier 1 Risk-Based Capital Ratio, Actual DEPOSITS Deposit Liabilities Disclosures [Text Block] Income on bank owned life insurance Bank Owned Life Insurance Income Long-term borrowings and Subordinated notes, net of unamortized issuance costs Long-Term Debt, Fair Value Schedule of Quantitative Information About Level 3 Fair Value Measurements Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] 12 months or more Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Counterparty Name [Domain] Counterparty Name [Domain] 2027 Lessee, Operating Lease, Liability, to be Paid, Year Two Condensed Financial Information Disclosure [Abstract] Condensed Financial Information Disclosure [Abstract] Investments, All Other Investments [Abstract] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Weighted-average remaining contractual life, options outstanding Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration] Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration] Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Income or Comprehensive Income [Extensible Enumeration] Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Income or Comprehensive Income [Extensible Enumeration] Available for Sale Available for Sale, Debt Securities in Unrealized Loss Position [Abstract] N/A Cash Net cash received in (paid for) acquisitions Payments to Acquire Businesses, Gross Impairment of fixed assets held for sale Impairment of Long-Lived Assets to be Disposed of DSU awards Deferred Stock Units [Member] Represents information pertaining to the deferred stock units. Non-PEO NEO Non-PEO NEO [Member] Other Corporate Reconciling Items And Eliminations [Member] Corporate Reconciling Items And Eliminations Intrinsic value, options outstanding Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value Issuance of treasury stock for ESPP Stock Issued During Period, Value, Employee Stock Purchase Plan Right of use assets Deferred Tax Liabilities, Leasing Arrangements Additional consideration transferred Business Combination, Consideration Transferred, Tangible and Intangible Assets, Excluding Cash Preferred stock, dividend rate Preferred Stock, Dividend Rate, Percentage Other interest income Interest Income, Other Changes in accumulated other comprehensive income (loss) by component, net of tax Accumulated Other Comprehensive Income (Loss) [Line Items] Notional Amount Derivative Liability, Notional Amount Brokered savings deposits and money market deposits Brokered Saving Deposits And Money Market Deposits Represents the amount of brokered saving deposits and money market deposits. Unrealized gross gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Award Type [Domain] Award Type [Domain] 2026 Lessee, Operating Lease, Liability, to be Paid, Year One Net unrealized holding gains (losses) on cash flow hedges Net gain (loss) recognized in OCI, net of tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Unused commitments to directors and executive officers Loans and Leases Receivable Related Parties Unused Commitments Represents the amount of unused commitments to grant loans or leases to related parties. Equity Awards Adjustments Equity Awards Adjustments [Member] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Compensation Amount Outstanding Recovery Compensation Amount Minimum To Be Well Capitalized Banking Regulation, Total Risk-Based Capital, Well Capitalized, Minimum Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Expected dividends Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Fair Value Estimate of Fair Value Measurement [Member] Number of full-service locations Number Of Full-Service Locations Which Entity Operates Number Of Full-Service Locations Which Entity Operates MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] FHLB Assets Pledged As Collateral, Federal Home Loan Bank [Member] Assets Pledged As Collateral, Federal Home Loan Bank Reclassification adjustment for realized (gains) losses on debt securities available for sale included in net income Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax ESPP Employee Stock [Member] Loans purchased Financing Receivable, Purchase Operating income Revenues [Abstract] 2029 Time Deposit Maturities, Year Four Documents Incorporated by Reference Documents Incorporated by Reference [Text Block] Weighted average discount rates: Weighted Average Discount Rate [Abstract] Weighted Average Discount Rate Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Financing Receivable, Past Due [Line Items] Financing Receivable, Past Due [Line Items] Schedule of Financial Instruments Owned and Pledged as Collateral Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block] Total long-term borrowings Long-Term Debt and Lease Obligation AOCI Accumulated Other Comprehensive Income (Loss), Net of Tax Weighted- Average Exercise Price Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Weighted Average Exercise Price [Roll Forward] Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Weighted Average Exercise Price Financial Instruments [Domain] Financial Instruments [Domain] Net change in unrealized/unrecognized gains (losses) on debt securities OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax Due after ten years Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 Consideration transferred per share in shares, Share Election (in shares) Business Combination Consideration Transferred Per Share In Shares, Share Election Business Combination Consideration Transferred Per Share In Shares, Share Election Total deferred tax liabilities Deferred Tax Liabilities, Gross Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases PSU awards Performance Shares [Member] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Other nontaxable or nondeductible Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount (Gain) loss reclassified from OCI to interest expense, net of tax Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax Pledging Purpose [Domain] Pledging Purpose [Domain] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Banking Regulation, Regulatory Capital Requirement, Compliance [Table] Banking Regulation, Regulatory Capital Requirement, Compliance [Table] Minimum Minimum [Member] Net interest income after provision for credit losses Interest Income (Expense), after Provision for Loan Loss Accounts, Notes, Loans and Financing Receivable [Line Items] Distributions of portfolio loans Accounts, Notes, Loans and Financing Receivable [Line Items] Company Selected Measure Name Company Selected Measure Name Debt securities available for sale sold, tax benefit Debt Securities, Available-For-Sale, Sold At Par Value, Tax Expense (Benefit) Debt Securities, Available-For-Sale, Sold At Par Value, Tax Expense (Benefit) Fair Value Measurement [Domain] Fair Value Measurement [Domain] Net income Business Combination, Pro Forma Information, Pro Forma Income (Loss), after Tax Minimum Capital Requirement Banking Regulation, Total Risk-Based Capital, Capital Adequacy, Minimum BORROWINGS Debt Disclosure [Text Block] (Gain) loss on sales of debt securities, net Gain (Loss) on Sale of Investments Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Operating cash flows from operating leases Operating Lease, Payments Loans evaluated individually, net of related allowance Financing Receivable, Individually Evaluated for Credit Loss, Average Recorded Investment Financing Receivable, Individually Evaluated for Credit Loss, Average Recorded Investment SSARs Stock Appreciation Rights (SARs) [Member] Collateral Held [Domain] Collateral Held [Domain] Expected volatility, minimum Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum 90 days past due and still accruing Financing Receivable, 90 Days or More Past Due, Still Accruing OUTSTANDING COMMITMENTS AND CONTINGENT LIABILITIES Commitments and Contingencies Disclosure [Text Block] Interest rate swaps: receive-fixed, pay-floating Interest rate swaps - pay floating, receive fixed Represent Interest rate swaps, pay floating, receive fixed. Secured borrowings Secured Borrowings [Member] Secured Borrowings Gross aggregate fair value of the swaps Cash Flow Hedges Derivative Instruments at Fair Value, Net [Abstract] Market Based Performance Stock Units Market Based Performance Stock Units Share instrument which are market based performance stock units Weighted average number of common shares outstanding, diluted (in shares) Weighted average number of common shares outstanding, diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Operating Segments Segment Reporting, Policy [Policy Text Block] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Weighted average remaining contractual term Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms Derivative [Table] Derivative [Table] Proceeds from life insurance Proceeds from Life Insurance Policy Entity Small Business Entity Small Business Common stock issuance costs Payments of Stock Issuance Costs Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Amortized Cost Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity [Abstract] Weighted average maturity Derivative, Average Remaining Maturity Preferred shares outstanding (in shares) Preferred shares outstanding (in shares) Preferred Stock, Shares Outstanding SOFR Loan Swaps SOFR Loan Swap [Member] SOFR Loan Swap State Current State and Local Tax Expense (Benefit) Document Transition Report Document Transition Report Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] 401(k) Plan expenses Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] Total undiscounted cash flows Finance Lease, Liability, to be Paid Preferred stock, value, outstanding Preferred Stock, Value, Outstanding Underlying Securities Award Underlying Securities Amount Schedule of Distribution of Securities Sold Under Agreements to Repurchase and Short-term Borrowings and Weighted Average Interest Rates Schedule of Securities Financing Transactions and Short-term Debt [Table Text Block] Tabular disclosure of distributions of securities sold under agreements to repurchase and short-term borrowings and related weighted average interest rates. Total time deposits with a minimum denomination of $100,000 Time Deposits, $100,000 or More Gross gains on debt securities Debt Securities, Available-for-Sale, Realized Gain Schedule of Expenses Related to the Employee Benefit Plans Defined Contribution Plan Disclosures [Table Text Block] Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date Net amortization (accretion) of premium (discount) on time deposits Accretion of Premiums and Discounts on Time Deposits Represents the accretion of premiums and discounts on time deposits. Subsequent Events Subsequent Events, Policy [Policy Text Block] INCOME TAXES Income Tax Disclosure [Text Block] Cash and cash equivalents Cash, Cash Equivalents, and Federal Funds Sold Weighted average remaining lease terms: Weighted Average Remaining Lease Terms [Abstract] Weighted Average Remaining Lease Terms Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Short-term lease costs Short-Term Lease, Cost Mortgage servicing rights sold Mortgage Servicing Rights Sold Mortgage Servicing Rights Sold Weighted-average remaining contractual life, exercisable at end of year Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Saving deposits and money market deposits Deposits, Interest-bearing Transaction Deposits, Saving Deposits and Money Market Deposits The aggregate of saving and money market deposit liabilities held by the entity. Fair Value Debt Securities, Held-To-Maturity, Unrealized Loss Position, Fair Value [Abstract] Debt Securities, Held-To-Maturity, Unrealized Loss Position, Fair Value Long-term borrowings Other Long Term Debt [Member] Other Long Term Debt Document Type Document Type Level 3 Inputs Fair Value, Inputs, Level 3 [Member] Outstanding at beginning of period (in shares) Outstanding at end of period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number EARNINGS PER COMMON SHARE Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Change in relationship Loans and Leases Receivable Related Parties Addition (Reduction) Due to Change in Relationship Represents the addition or reduction in the carrying amounts of loans and leases receivable due from related parties as a result of the change in relationship with the entity. Additional paid-in capital Additional Paid in Capital Product and Service [Axis] Product and Service [Axis] Revolving Loans, charge-off Financing Receivable, Excluding Accrued Interest, Revolving, Writeoff Variable lease costs Variable Lease, Cost Amount of interest collected and recognized on a cash basis Financing Receivable, Nonaccrual And Equal To Or Greater Than 90 Days Past Due, Cash Basis Interest Income Financing Receivable, Nonaccrual And Equal To Or Greater Than 90 Days Past Due, Cash Basis Interest Income Ratio of gross unrealized or unrecognized losses to debt securities with gross unrealized or unrecognized losses Held For Maturity Securities in Unrealized Loss Positions as Percentage of Aggregate Carrying Value Represents the total number of securities in the investment portfolio which are in an unrealized loss position as a percentage of the aggregate carrying value. Loan Modifications Financing Receivable, Loan Modifications, Policy [Policy Text Block] Financing Receivable, Loan Modifications, Policy Wealth Management Wealth Management Represents information pertaining to Wealth management segment. Financial Instruments Subject to Mandatory Redemption, Financial Instrument [Domain] Financial Instruments Subject to Mandatory Redemption, Financial Instrument [Domain] Other intangible assets acquired during the period Finite-Lived Intangible Assets Acquired Statistical Measurement [Axis] Statistical Measurement [Axis] New markets tax credits Effective Income Tax Rate Reconciliation, New Market Tax Credits, Amount Effective Income Tax Rate Reconciliation, New Market Tax Credits, Amount 5.25% notes maturing June 1, 2030 Subordinated notes issued in 2020 5.25% notes maturing June 1, 2030 Subordinated notes that mature on June 1, 2030. (Gain) loss on sales of equity securities, net Equity Method Investment, Realized Gain (Loss) on Disposal 2024 charge-off 2023 charge-off Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Employee costs Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Cash paid for withholding taxes on stock-based payments Payment, Tax Withholding, Share-Based Payment Arrangement Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Leverage Ratio of Tier 1 Capital to Average Assets, Ratio Banking Regulation, Leverage Ratio [Abstract] Due after one year through five years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value Net income available to common stockholders Net income available to common stockholders Net Income (Loss) Available to Common Stockholders, Basic Replacement awards Replacement Awards [Member] Replacement Awards OCI OCI, net of tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Weighted- Average Remaining Contractual Term Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Additional Disclosures [Abstract] Schedule of Net Gains (Losses) Relating to these Derivative Instruments Derivative Instruments, Gain (Loss) [Table Text Block] Net issuance of treasury stock for SSARs and warrants exercised and related tax Stock Issued, Value, Stock Options Exercised, Net of Tax Benefit (Expense) Total expense Operating Expenses Current Financing Receivable, Excluding Accrued Interest, Modified, after 12 Months Risk-free rate, minimum Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum Level 1 Inputs Fair Value, Inputs, Level 1 [Member] PCD Financial Assets Purchased with Credit Deterioration, Financial Assets [Abstract] Purchased with Credit Deterioration, Financial Assets Beginning balance (in shares) Ending balance (in shares) Shares, Outstanding Preferred stock redemption price per share (in dollars per share) Preferred Stock, Redemption Price Per Share Related Party Transaction [Table] Related Party Transaction [Table] Diluted earnings per common share (in dollars per share) Earnings Per Share, Diluted FDIC insurance Federal Deposit Insurance Corporation Premium Expense Deposits from related parties Related Party Deposit Liabilities Other credits Effective Income Tax Rate Reconciliation, Tax Credit, Other, Amount 2030 Lessor, Operating Lease, Payment to be Received, Year Five Schedule of Lease-Related Balances Schedule of Lease Related Balances [Table Text Block] Tabular disclosure of lease-related balances reported in the consolidated balance sheets. Non-cash investing and financing activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Schedule of Gains and Losses on Debt Securities Available for Sale Schedule of Realized Gain (Loss) [Table Text Block] AOCI Attributable to Parent, Net of Tax [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] Compensation Related Costs [Abstract] Amortized cost basis Financing Receivable, Excluding Accrued Interest, Modified in Period, Amount Omnibus Incentive 2018 Plan Omnibus Incentive 2018 Plan [Member] Omnibus Incentive 2018 Plan Replacement of CrossFirst RSUs and PSUs (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Replacement from Business Acquisition In Period Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Replacement from Business Acquisition In Period Less: Treasury (in shares) Treasury Stock, Common, Shares Interest rate swaps: receive-floating, pay-fixed Interest rate swaps - pay fixed, receive floating Represent Interest rate swaps, pay fixed, receive floating. Other Illinois/Other Income Tax Paid, State and Local, after Refund Received Consolidation Items [Domain] Consolidation Items [Domain] Long-term borrowings Interest Expense, Other Long-Term Debt Derivative liability, statement of financial position [Extensible Enumeration] Derivative Liability, Statement of Financial Position [Extensible Enumeration] Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Schedule of Maturities of Time Deposits Schedule of Time Deposit Maturities [Table Text Block] Tabular disclosure for time deposits and the aggregate amount of maturities for each of the five years following the balance sheet date. Auditor Location Auditor Location Core deposit intangible Core Deposits [Member] Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] Directors and executive officers Directors and executive officers Represents the person serving on the board of directors and the ranking officers of the entity, appointed to the position by the board of directors. Performance Based Performance Stock Units Performance Based Performance Stock Units Share instrument which are performance-based performance stock units. Schedule of Activity Related to Foreclosed Assets Schedule of Activity Related to Foreclosed Assets [Table Text Block] Schedule of Activity Related to Foreclosed Assets Term Extension Extended Maturity [Member] Unrealized/Unrecognized gains (losses) on debt securities: Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent [Abstract] Condensed Balance Sheet Statement [Table] Condensed Balance Sheet Statement [Table] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Comprehensive Income Comprehensive Income, Policy [Policy Text Block] Federal Domestic Tax Jurisdiction [Member] Intrinsic value, options outstanding Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Intrinsic Value Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Intrinsic Value Vested and outstanding at end of period (in shares) Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested And Outstanding The number of equity-based payment instruments, excluding stock (or unit) options, that validly exist and are vested and outstanding, as of the balance sheet date. Financial Instruments Owned and Pledged as Collateral [Line Items] Financial Instruments Owned and Pledged as Collateral [Line Items] Estimated amount due, penalties (approximately) Income Tax Examination, Estimate of Possible Loss, Penalties Income Tax Examination, Estimate of Possible Loss, Penalties Consideration transferred per share in cash, Share Election (in dollars per share) Business Combination Consideration Transferred Per Share In Cash, Share Election Business Combination Consideration Transferred Per Share In Cash, Share Election Business Combination, Contingent Consideration [Line Items] Business Combination, Contingent Consideration [Line Items] Less: Amounts representing interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Proceeds from sales of equity securities Proceeds from Sale of Equity Securities, FV-NI Diluted earnings per common share (in dollars per share) Diluted Earnings Per Share Pro Forma Intrinsic value, exercisable at end of year Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Exercisable, Intrinsic Value Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Exercisable, Intrinsic Value Other nontaxable or nondeductible Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Percent 2026 Time Deposit Maturities, Year One Total income tax payments Income Taxes Paid, Net Commitments to extend credit Commitments to Extend Credit [Member] 2027 Finite-Lived Intangible Asset, Expected Amortization, Year Two Limit where loans are processed through an expedited underwriting process Loans and Leases Receivable Limit above which Loans are Processed Through an Expedited Underwriting Process Represents the limit of loan where loans are processed through an expedited underwriting process. Low income housing tax credits Effective Income Tax Rate Reconciliation, LIHTC Credits And Benefits, Net Of Amortization, Percent Effective Income Tax Rate Reconciliation, LIHTC Credits And Benefits, Net Of Amortization, Percent Total long-term borrowings Long-Term Debt, Gross Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer PREMISES AND EQUIPMENT Property, Plant and Equipment Disclosure [Text Block] Total undiscounted cash flows Lessee, Operating Lease, Liability, to be Paid Premises and equipment, net Premises and equipment, net Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization Low income housing tax credits Effective Income Tax Rate Reconciliation, LIHTC Credits And Benefits, Net Of Amortization Effective Income Tax Rate Reconciliation, LIHTC Credits And Benefits, Net Of Amortization Schedule of Regulatory Capital Requirements Applicable to Busey and Busey Bank Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block] Due after five years through ten years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years, Fair Value Total portfolio loans Total Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss Provision for loan losses Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal), Excluding Business Acquisition Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal), Excluding Business Acquisition Securities sold under agreements to repurchase Securities Sold under Agreements to Repurchase Schedule of Revenue Recorded in Connection with Leases Operating Lease, Lease Income [Table Text Block] Schedule of Debt Securities in an Unrealized or Unrecognized Loss Position Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] Expiration Date Trading Arrangement Expiration Date Increase (decrease) in other liabilities Increase (Decrease) in Other Operating Liabilities 2030 Finite-Lived Intangible Asset, Expected Amortization, Year Five Minimum To Be Well Capitalized Banking Regulation, Common Equity Tier 1 Risk-Based Capital Ratio, Well Capitalized, Minimum Unrealized net gains (losses) recognized on equity securities Equity Securities, FV-NI, Unrealized Gain (Loss) Impairment of mortgage servicing rights Mortgage Servicing Rights (MSR) Impairment (Recovery) Premises and equipment, net Property, Plant and Equipment, Net Weighted average variable Prime pay rates and 1-month CME Term SOFR pay rates Derivative, Average Variable Interest Rate Schedule of Investments Equity Method Investments [Table Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Real estate construction Construction Loans [Member] Series A Preferred Stock Series A Preferred Stock [Member] Entity Current Reporting Status Entity Current Reporting Status Treasury management services Treasury Management Services [Member] Treasury Management Services Bank Investments in Banking Subsidiaries Represents total investments in banking subsidiaries that are required to be consolidated. Receivables [Abstract] Derivative Financial Instruments Derivative [Line Items] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Collateral Held [Axis] Collateral Held [Axis] Consolidated Entities [Domain] Consolidated Entities [Domain] Income taxes at federal statutory rate Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Cash paid for premiums on bank-owned life insurance Payment to Acquire Life Insurance Policy, Investing Activities (Gain) loss on sales of premises and equipment Gain (Loss) on Disposition of Property Plant Equipment Net issuance of treasury stock for RSU/PSU/DSU vesting and related tax (in shares) Net issuance of treasury stock (in shares) Restricted Stock, Shares Issued Net of Shares for Tax Withholdings Gross unrealized or unrecognized losses on debt securities Debt Securities Accumulated Gross Unrealized Loss Before Tax Gross total of unrealized losses on debt securities. Financial Instrument [Axis] Financial Instrument [Axis] Deferred tax assets: Deferred Tax Assets, Gross [Abstract] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Executive Category: Executive Category [Axis] 12 months or more Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Compensation Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-Based Payment Arrangement, Percent Busey Bank Busey Bank Represents the information pertaining to Busey Bank. Mixed consideration ratio (in shares) Business Combination Mixed Consideration Transferred In Shares Business Combination Mixed Consideration Transferred In Shares Repayments of investments in subsidiaries Repayments Of Investments In Subsidiaries Repayments Of Investments In Subsidiaries Portfolio Loans Financing Receivable [Policy Text Block] State and local income taxes (net of federal income tax effect) Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent M&M M&M Merchants and Manufacturers Bank Corporation [Member] Merchants and Manufacturers Bank Corporation Exercisable (in dollars per share) Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instruments, Exercisable, Weighted Average Exercise Price Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instruments, Exercisable, Weighted Average Exercise Price Appraisal of collateral Valuation, Market Approach [Member] Current Fiscal Year End Date Current Fiscal Year End Date Simulation term Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Less than 12 months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Total deposits Deposits OREO and other repossessed assets with subsequent impairment Other Real Estate Owned, Measurement Input Schedule of Distribution of Portfolio Loans Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Weighted- Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Remaining shares available for issuance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Investment in FHLB stock Federal Home Loan Bank Stock Professional fees Professional Fees Fair Value Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value Fair value recorded in other liabilities Derivative liabilities Derivative Liability Real Estate Property, Ownership [Table] Real Estate Property, Ownership [Table] Proceeds from the exercise of stock options and warrants Proceeds from Stock Options And Warrants Exercised Proceeds from Stock Options And Warrants Exercised Other noninterest expense Other Noninterest Expense Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Loan Restructuring Modification [Axis] Loan Restructuring Modification [Axis] Pass Pass [Member] Collateral held to secure obligations under derivative contracts Interest Rate Contract Interest Rate Contract [Member] Time deposits Time Deposits, at Carrying Value Total Gross unrealized or unrecognized losses on debt securities Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss Amortization of New Markets Tax Credit Investment Tax Credit Equity securities Equity Securities, FV-NI, Current BALANCE SHEETS Condensed Balance Sheet Statements, Captions [Line Items] Stock issued in acquisition, net of stock issuance costs Stock Issued During Period, Value, Acquisitions Net assets acquired Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less) Total anti-dilutive common stock equivalents (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Weighted Average Shares Outstanding Weighted Average Number of Shares Outstanding, Diluted [Abstract] Leases not yet commenced commitments Unrecorded Unconditional Purchase Obligation Issuance of preferred stock, net of stock issuance costs Proceeds from Issuance of Preferred Stock and Preference Stock Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Schedule of Held-to-Maturity Securities [Line Items] Schedule of Held-to-Maturity Securities [Line Items] Other servicing rights Other Servicing Asset at Fair Value Amount Represents the other servicing asset Collateral Pledged Collateral Pledged [Member] Schedule of Past Due and Non-accrual Loans and Non-Accrual Status Financing Receivable, Past Due [Table Text Block] Bank Distributions Less than in Excess of Net Income (Loss) of Banking Subsidiaries Represents the distributions made less than or in excess of net income loss by banking subsidiaries. Interest-bearing Interest-Bearing Deposit Liabilities LEASES Lessee, Operating Leases [Text Block] Net cash used in financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Measure: Measure [Axis] Defined Contribution Plan, Type [Domain] Defined Contribution Plan, Type [Domain] Defined Contribution Plan, Type [Domain] Cash payments (collected) paid Other Real Estate Cash payments (Collected) Paid Amount of cash payments collected from other real estate. Provision for credit losses Financing Receivable, Credit Loss, Expense (Reversal) Valuation Approach and Technique [Axis] Valuation Approach and Technique [Axis] Thereafter Finite-Lived Intangible Asset, Expected Amortization, after Year Five Busey bank paid dividends to the company, amount received Proceeds from Dividends Received Fair value Derivative, Fair Value, Net Leverage Ratio of Tier 1 Capital to Average Assets, Amount Banking Regulation, Tier 1 Leverage Capital [Abstract] 5.000% notes maturing June 15, 2032 Subordinated notes issued in 2022 Fixed-to-floating rate notes due 2032 Represents the fixed-to-floating rate notes due 2032. Long-Lived Tangible Asset [Domain] Long-Lived Tangible Asset [Domain] Junior subordinated debt owed to unconsolidated trusts Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Noncurrent Liabilities, Junior Subordinated Notes Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Noncurrent Liabilities, Junior Subordinated Notes Employer next matching contribution, percent of employees' gross pay Defined Contribution Plan, Second Employer Matching Contribution, Percent of Employees' Gross Pay Defined Contribution Plan, Second Employer Matching Contribution, Percent of Employees' Gross Pay Debt securities held to maturity Debt Securities, Held-to-Maturity, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] Grant date fair value of the award Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Value The value of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Retail loans Consumer Portfolio Segment [Member] Schedule of Reclassification of Unrealized Gains and Losses from OCI Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Total Capital to Risk Weighted Assets, Amount Banking Regulation, Total Capital [Abstract] Due after ten years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Fair Value Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Entity Tax Identification Number Entity Tax Identification Number 2022 charge-off 2021 charge-off Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff Commitments [Table] Commitments [Table] Discloses specific components (such as the nature, name, and date) of commitments. Derivative Derivative [Member] Interest income Interest And Dividend Income, Operating, Adjusted Interest And Dividend Income, Operating, Adjusted Outstanding at beginning of year (in dollars per share) Outstanding at end of year (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Lease liabilities Deferred Tax Assets, Lease liabilities Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from lease liability. Residential real estate in the process of foreclosure Real Estate In Foreclosure Represents the value of real estate loans in the process of foreclosure at period end. Per share cash consideration entitled (in dollars per share) Business Combination Consideration Transferred Per Share In Cash, Cash Election The cash outflow per share associated with the acquisition of business during the period. The cash portion only of the acquisition price. Common shares issued (in shares) Common Stock, Shares, Issued Derivative asset, statement of financial position [Extensible Enumeration] Derivative Asset, Statement of Financial Position [Extensible Enumeration] Operating leases Operating Lease, Weighted Average Remaining Lease Term Commercial mortgage-backed securities Commercial Mortgage-Backed Securities [Member] GOODWILL AND OTHER INTANGIBLE ASSETS Goodwill and Intangible Assets Disclosure [Text Block] Current expense: Current Federal, State and Local, Tax Expense (Benefit) [Abstract] Card services and ATM fees Card Services And ATM Fees [Member] Card Services And ATM Fees Dividend equivalents earned (in shares) Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments Other than Options Dividend Equivalent Earned in Period The number of equity-based payment instruments, excluding stock (or unit) options, that were awarded as dividend equivalents during the reporting period. Entity Public Float Entity Public Float Schedule of Carrying Amount of Goodwill by Operating Segment Schedule of Goodwill [Table Text Block] Trading Arrangement: Trading Arrangement [Axis] Total Shareholder Return Amount Total Shareholder Return Amount Number of risk participation agreements Number of Risk Participation Agreements Number of Risk Participation Agreements Security Exchange Name Security Exchange Name Purchases of loans Payments to Acquire Finance Receivables Rental income Lease Income 30-89 Days Financial Asset, 30 to 89 Days Past Due [Member] Financial Asset, 30 to 89 Days Past Due Mortgage banking derivative assets Interest rate lock commitments and forward sales commitments Represents interest rate lock commitments and forward sales commitments. 2027 Lessor, Operating Lease, Payment to be Received, Year Two Aggregate intrinsic value of SSARs exercised Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instruments, Aggregate Intrinsic Value, Exercised Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instruments, Aggregate Intrinsic Value, Exercised PORTFOLIO LOANS Financing Receivables [Text Block] Cash dividends on preferred stock Dividends, Preferred Stock Pledging Purpose [Axis] Pledging Purpose [Axis] Expense Operating Expenses [Abstract] Deferred loan origination costs Deferred Tax Liabilities, Deferred Expense, Deferred Loan Origination Costs Amount of deferred tax liability attributable to taxable temporary differences from loan origination costs. Asset Class [Domain] Asset Class [Domain] (Gain) loss on sales of loans, net Gain Loss on Sale of Loans Net It represents the (gain) loss on sale of loans, net. Gains (losses) recognized in earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings CrossFirst Acquisition CrossFirst Acquisition [Member] CrossFirst Acquisition Unrealized gains (losses) on cash flow hedges: Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax, Parent [Abstract] Statement [Line Items] Statement [Line Items] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Total cash and cash equivalents Cash and Cash Equivalent Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Net issuance of treasury stock for RSU/PSU/DSU vesting and related tax Restricted Stock, Value, Shares Issued Net of Tax Withholdings Increase in the number of shares authorized for issuance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized Risk-free rate, maximum Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum Provision for deferred income taxes Increase (Decrease) in Deferred Income Taxes Common Common stock Common Stock [Member] Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Finance Leases Finance Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Net increase (decrease) in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Dilutive effect of common stock equivalents (in shares) Weighted Average Number of Shares Outstanding, Diluted, Adjustment Other repossessed assets Other Repossessed Assets Cash dividends, common stock (in dollars per share) Common Stock, Dividends, Per Share, Cash Paid Obligation with Joint and Several Liability Arrangement [Table] Obligation with Joint and Several Liability Arrangement [Table] Statistical Measurement [Domain] Statistical Measurement [Domain] Prime Loan Swap Prime Loan Swap [Member] Prime Loan Swap Premises and equipment Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Five Collateral dependent loans secured by real estate or business assets Collateral Dependent Loans Represents collateral dependent loans secured by real estate or business assets. Balance sheets Condensed Balance Sheet [Table Text Block] Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss Gross interest income that would have been recorded if impaired loans had been current Financing Receivable, Nonaccrual, Interest Income OREO and other repossessed assets with subsequent impairment Real Estate Acquired in Satisfaction of Debt [Member] Asset Class [Axis] Asset Class [Axis] Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Cash pledged to secure obligations under derivative contracts Interest Rate Swap Interest Rate Swap [Member] Leases [Abstract] Leases [Abstract] Total Debt securities with gross unrealized or unrecognized losses, fair value Debt Securities, Held-to-Maturity, Unrealized Loss Position, Fair Value Exercise timing, number of days after termination Exercise Timing, Number Of Days After Termination Exercise Timing, Number Of Days After Termination 2029 Lessor, Operating Lease, Payment to be Received, Year Four Business combination consideration, number of shares (in shares) Business Combination, Consideration Transferred, Equity Interest, Share Issued, Number of Shares Schedule of Risk Grades of Portfolio Loans, Further Sorted by Origination Financing Receivable Credit Quality Indicators By Origination [Table Text Block] Tabular disclosure of financing receivables by credit quality indicator and origination. The credit quality indicator is a statistic about the credit quality of financing receivables. Examples include, but not limited to, consumer credit risk scores, credit-rating-agency ratings, an entity's internal credit risk grades, loan-to-value ratios, collateral, collection experience and other internal metrics. Non-accrual Loans with No Allowance for Credit Losses Financing Receivable, Excluding Accrued Interest, Nonaccrual, No Allowance Replacement of CrossFirst RSUs and PSUs (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Replacement from Business Acquisition In Period, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Replacement from Business Acquisition In Period, Weighted Average Grant Date Fair Value Pledged Status [Axis] Pledged Status [Axis] Limit above which loans are annually reviewed Loans and Leases Receivable, Limit Above Which Loans are Annually Reviewed Represents the limit of loan above which loans are reviewed annually. Ratio of gross unrealized or unrecognized losses to debt securities with gross unrealized or unrecognized losses Securities in Unrealized Loss Positions as Percentage of Aggregate Carrying Value Represents the total number of securities in the investment portfolio which are in an unrealized loss position as a percentage of the aggregate carrying value. Proceeds from other borrowings, net of debt issuance costs Proceeds from Other Debt Unrealized gross losses Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Net issuance of treasury stock for SSARs and warrants exercised and related tax (in shares) Stock Issued, Shares, Stock Options Exercised, Net of Tax Benefit (Expense) Number of treasury shares issued as a result of the exercise of stock options, after deduction of related income tax (expense) benefit. Basic earnings per common share (in dollars per share) Earnings Per Share, Basic Purchase accounting adjustments Deferred Tax Assets, Purchase Accounting Adjustments Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from Purchase accounting adjustments. Deferred tax assets before valuation allowances Deferred Tax Assets, Gross Common Stock ($0.001 par value) Common Stock, $0.001 par value [Member] Common Stock, $0.001 par value Schedule of Information Relating to Operating Segments Schedule of Segment Reporting Information, by Segment [Table Text Block] Short-term debt Short-Term Debt Deferred expense: Deferred Federal, State and Local, Tax Expense (Benefit) [Abstract] 2030 Time Deposit Maturities, Year Five C&I and other commercial Commercial And Industrial And Other Commercial [Member] Commercial And Industrial And Other Commercial Variable rate, commercial loans that are supported by the interest rate swap contracts Derivative Swap Type Variable Rate Amount of variable rate, commercial loans that are supported by the interest rate swap contracts. Unrecognized gross gains Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain Measurement Input Type [Domain] Measurement Input Type [Domain] Schedule of Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis Fair Value Measurements, Nonrecurring [Table Text Block] Cumulative Effect, Period of Adoption [Domain] Cumulative Effect, Period of Adoption [Domain] 2028 Finance Lease, Liability, to be Paid, Year Three Charged-off Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff Obligations of U.S. government corporations and agencies US Government Corporations and Agencies Securities [Member] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Taxable interest income Interest Income, Securities, Operating, Taxable Accounts and Financing Receivables [Table] Accounts and Financing Receivables [Table] Other assets Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Other Assets Amount of other assets acquired at the acquisition date. Unrealized holding gains (losses), net OCI, before Reclassifications, Net of Tax, Attributable to Parent Compensation expense recognized Total stock-based compensation expense Share-Based Payment Arrangement, Expense Short-term borrowings Interest Expense, Short-Term Borrowings Excluding Federal Funds and Securities Sold under Agreements to Repurchase Hedging Designation [Domain] Hedging Designation [Domain] Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Count of debt securities Total Count Of Debt Securities, Held To Maturity Total count of held to maturity debt securities. Loans held for sale Financing Receivable, Held-for-Sale, Not Part of Disposal Group, after Valuation Allowance Range (Weighted Average) Fair Value Measurement Inputs and Valuation Techniques [Abstract] Total liabilities and stockholders’ equity Liabilities and Equity Anti-dilutive securities excluded from the calculation of common stock equivalents Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Stock issued in acquisition, net of stock issuance costs (in shares) Stock Issued During Period, Shares, Acquisitions Receive-floating, pay-fixed Derivative, Gain Losses On Derivative Pay Fixed, Receive Floating Amount of increase (decrease) in the fair value of derivatives pay fixed receive floating recognized in the income statement. Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward] Amounts reclassified from AOCI, net and Amortization of unrecognized losses on securities transferred to held to maturity Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent Other Deferred Tax Assets, Other Equity Method Investment [Table] Equity Method Investment [Table] Accounting Policies [Abstract] Accounting Policies [Abstract] New loans/advances Loans and Leases Receivable, Related Parties, Additions Schedule of Future Undiscounted Lease Payments Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Forward sales commitments Forward Contracts [Member] Treasury Stock Treasury Stock, Common [Member] Fair value of SSARs that have vested Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value 2025 2024 Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year Furniture and equipment Furniture and equipment Represents the equipment commonly used in offices and stores that have no permanent connection to the structure of a building or utilities and the tangible personal property used to produce goods and services. Pay vs Performance Disclosure [Line Items] Minimum To Be Well Capitalized Banking Regulation, Tier 1 Leverage Capital Ratio, Well Capitalized, Minimum Operating leases Present value of net future minimum lease payments Operating Lease, Liability Total lease payments from operating leases Lessor, Operating Lease, Payment to be Received 90+ Days Financial Asset, Equal to or Greater than 90 Days Past Due [Member] Preferred stock, liquidation preference (in dollars per share) Preferred Stock, Liquidation Preference Per Share Liabilities Liabilities: Liabilities [Abstract] BUSINESS COMBINATIONS Business Combination [Text Block] Amortization expense Finance Lease, Right-of-Use Asset, Amortization Loans with Subsequent Defaults Financing Receivable, Excluding Accrued Interest, Modified, Subsequent Default Federal Reserve Bank Assets Pledged As Collateral, Federal Reserve Bank [Member] Assets Pledged As Collateral, Federal Reserve Bank Number of shares redeemed ( in shares) Stock Redeemed or Called During Period, Shares Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Goodwill impairment Goodwill, Impairment Loss REGULATORY CAPITAL Regulatory Capital Requirements under Banking Regulations [Text Block] 2023 2022 Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount 2028 Lessee, Operating Lease, Liability, to be Paid, Year Three Prior, charge-off Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year, Writeoff Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Minimum To Be Well Capitalized Banking Regulation, Tier 1 Risk-Based Capital Ratio, Well Capitalized, Minimum Total comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Measurement Input Type [Axis] Measurement Input Type [Axis] Debt securities with gross unrealized or unrecognized losses, fair value Debt Securities, Fair Value Fair value of total debt securities. Name Measure Name Net increase (decrease) in deposits Increase (Decrease) in Deposits Proceeds from paydowns and maturities of debt securities available for sale Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale Class of Stock [Line Items] Class of Stock [Line Items] Trust Preferred Securities Subject to Mandatory Redemption Trust Preferred Securities Subject to Mandatory Redemption [Member] Schedule of Modified Loans with Subsequent Defaults Financing Receivable, Modified, Subsequent Default [Table Text Block] Termination rate assumed thereafter (as a percent) Termination Rate Assumed Thereafter, Percentage Termination Rate Assumed Thereafter, Percentage Debt securities available for sale Available-for-Sale Securities, Debt Maturities [Abstract] Legal Entity [Axis] Legal Entity [Axis] Percentage of principal amount of notes Percentage of Principal Amount of Notes Percentage of principal amount of notes. Total assets Total assets Assets Statements of cash flows Condensed Cash Flow Statement [Table Text Block] ACL Deferred Tax Asset, Tax Deferred Expense, Reserve and Accrual, Financing Receivable, Allowance for Credit Loss 2026 Finite-Lived Intangible Asset, Expected Amortization, Year One Retail other Consumer, Other [Member] Vested (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Financing Receivable, Credit Quality Indicator [Line Items] Financing Receivable, Credit Quality Indicator [Line Items] Management Management [Member] Income Taxes and Tax Credit and Other Investments in Unconsolidated Entities Income Tax, Policy [Policy Text Block] Deferred taxes Components of Deferred Tax Assets and Liabilities [Abstract] Debt securities, carrying amount Debt Securities Cash flows provided by (used in) operating activities Cash flows provided by (used in) operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] SIGNIFICANT ACCOUNTING POLICIES Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Cash Surrender Value of Bank-Owned Life Insurance Cash Surrender Value of Bank Owned Life Insurance [Policy Text Block] Disclosure of accounting policy for the cash surrender value of life insurance policies owned by the entity. Net amortization (accretion) on portfolio loans Amortization of Deferred Loan Origination Fees, Net Due after one year through five years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Amortized Cost 2027 Time Deposit Maturities, Year Two 2029 Finite-Lived Intangible Asset, Expected Amortization, Year Four Minimum Capital Requirement Banking Regulation, Total Risk-Based Capital Ratio, Capital Adequacy, Minimum Fair Value Fair Value Debt securities held to maturity Debt Securities, Held-to-Maturity, Fair Value Warrants Warrant [Member] 2026 Finance Lease, Liability, to be Paid, Year One Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Right of use assets obtained in exchange for operating lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Lease costs Lease, Cost [Abstract] Debt Securities, Available-for-Sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Schedule of Activity Related to OREO and Other Repossessed Assets Other Real Estate, Roll Forward [Table Text Block] Total assets acquired Business Combination, Recognized Asset Acquired, Asset Cumulative effect of change in accounting principal (ASU 2023-02) Cumulative Effect, Period of Adoption, Adjustment [Member] Level 2 Inputs Fair Value, Inputs, Level 2 [Member] Short-term borrowings Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Short-Term Debt Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Short-Term Debt Document Financial Statement Error Correction Document Financial Statement Error Correction [Flag] State and local income taxes (net of federal income tax effect) Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Credit Commitments and Contingencies Fair Value, off-Balance-Sheet Risks, Disclosure Information [Line Items] Investments in unconsolidated entities Equity Method Investments Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Business Combination [Domain] Business Combination [Domain] Operating Leases Lessee, Operating Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Total pledged loans Asset Pledged as Collateral [Member] Schedule of the Components of Income Taxes Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Plan Name [Axis] Plan Name [Axis] Premises and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Document Information [Table] Document Information [Table] PEO PEO [Member] Obligation with Joint and Several Liability Arrangement [Line Items] Obligation with Joint and Several Liability Arrangement [Line Items] Sales (purchases) of equity securities, net Proceeds for (Payments of) Equity Method Investments Proceeds for (Payments of) Equity Method Investments Restricted Bank Stock Restricted Securities, FHLB [Policy Text Block] Restricted Securities, FHLB Actual Banking Regulation, Tier 1 Leverage Capital, Actual Schedule of Maturities Of Debt Securities Investments Classified by Contractual Maturity Date [Table Text Block] Basis in core deposit, customer intangible assets, and asset purchase goodwill Deferred Tax Liabilities, Intangible Assets Due in one year or less Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value Junior Subordinated Debt Junior Subordinated Debt [Member] Financial Asset Acquired with Credit Deterioration Financial Asset Acquired with Credit Deterioration [Member] Actual Banking Regulation, Common Equity Tier 1 Risk-Based Capital, Actual Gross aggregate fair value of swap liabilities Cash Flow Hedge Derivative Instrument Liabilities at Fair Value Basis in premises and equipment Deferred Tax Liabilities, Property, Plant and Equipment Time deposits Time deposits Time Deposits Retained Earnings Retained Earnings [Member] Weighted- Average Remaining Contractual Term, Exercisable (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Exercisable, Weighted Average Remaining Contractual Term Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Exercisable, Weighted Average Remaining Contractual Term Income Tax Jurisdiction [Axis] Income Tax Jurisdiction [Axis] Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Cash and cash equivalents, beginning of period Cash and cash equivalents, ending of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement [Abstract] Income Statement [Abstract] Fair value recorded in other assets Derivative assets Derivative Asset 12 months or more Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Fair Value, Nonrecurring Fair Value, Nonrecurring [Member] Replacement of CrossFirst SSARs (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Replacement Of CrossFirst SSARs Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Replacement Of CrossFirst SSARs Net issuance of treasury stock for warrants exercised Stock Issued During Period, Warrants Exercised, Net of Shares Redeemed and Tax, Value Stock Issued During Period, Warrants Exercised, Net of Shares Redeemed and Tax, Value Other intangible assets, net Intangible Assets, Net (Excluding Goodwill) All other noninterest income Noninterest Income, Other Minimum Capital Requirement Banking Regulation, Common Equity Tier 1 Risk-Based Capital, Capital Adequacy, Minimum Financing Receivable, Troubled Debt Restructuring [Table] Financing Receivable, Modified [Table] Restricted bank stock Federal Reserve Bank Stock Product and Service [Domain] Product and Service [Domain] Debt securities available for sale Debt Securities, Available-for-Sale [Abstract] Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Junior Subordinated Debt Owed to Unconsolidated Trusts Junior Subordinated Debt Owed to Unconsolidated Trusts Junior Subordinated Debt Owed to Unconsolidated Trusts 2028 Lessor, Operating Lease, Payment to be Received, Year Three Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Business Combination [Table] Business Combination [Table] Brokered interest-bearing transaction deposits Brokered Interest-Bearing Transaction Deposits Brokered Interest-Bearing Transaction Deposits Notional amount Notional amount Derivative, Notional Amount Intersegment interest income Intersegment Interest Income Intersegment Interest Income Cash flows related to leases Cash Flow, Operating Activities, Lessee [Abstract] Tax-exempt interest, net Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount Revolving Loans Financing Receivable, Excluding Accrued Interest, Revolving Schedule of Estimated Acquisition-Date Fair Values of the Assets Acquired and Liabilities Assumed Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block] Accounting Standards Update [Extensible Enumeration] Accounting Standards Update [Extensible Enumeration] Fair Value Fair Value Measurements, Nonrecurring Value Measurement [Abstract] Junior subordinated debt owed to unconsolidated trusts Interest Expense, Junior Subordinated Debentures City Area Code City Area Code Schedule of Loans Evaluated Individually, Segregated by Loan Category and Class Financing Receivable, Allowance for Credit Loss [Table Text Block] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] 8.25% Fixed-Rate Series B Non-Cumulative Perpetual Preferred Stock 8.25% Fixed-Rate Series B Non-Cumulative Perpetual Preferred Stock [Member] 8.25% Fixed-Rate Series B Non-Cumulative Perpetual Preferred Stock TAX CREDIT INVESTMENTS AND OTHER INVESTMENTS IN UNCONSOLIDATED ENTITIES Investment [Text Block] Expired (in dollars per shares) Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instruments, Expired In Period, Weighted Average Exercise Price Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instruments, Expired In Period, Weighted Average Exercise Price Junior subordinated debt owed to unconsolidated trusts Junior subordinated debentures owed to unconsolidated trusts Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust Proceeds from (cash paid for) the exercise of stock options, warrants, and SSARs Proceeds From (Payments For) Stock Options, Warrants And Stock Appreciation Rights Exercised, Net Proceeds From (Payments For) Stock Options, Warrants And Stock Appreciation Rights Exercised, Net Cash flows provided by (used in) investing activities Cash flows provided by (used in) investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Accrued interest receivable Interest Receivable Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] Employer matching contribution, percent of match Defined Contribution Plan, Employer Matching Contribution, Percent of Match Bank Dividend Income Operating Banking Subsidiaries Represents the dividend from bank subsidiaries to the holding company. Related Party Transactions [Abstract] Related Party Transactions [Abstract] Gains (losses) recognized on equity securities, net Debt Securities, Realized Gain (Loss) Estimated amount due Income Tax Examination, Estimate of Possible Loss Effective Income Tax Rate Reconciliation [Line Items] Effective Income Tax Rate Reconciliation [Line Items] Total lease cost Lease, Cost Cash Flow Hedging Cash Flow Hedging [Member] Other liabilities Other Liabilities Goodwill Total goodwill Goodwill Schedule of Lease Costs and Other Lease Information Lease, Cost [Table Text Block] Net proceeds from OREO and other repossessed assets Proceeds From Sale Of Other Real Estate And Other Repossessed Assets, Including Cash Payments Collected, Net Proceeds From Sale Of Other Real Estate And Other Repossessed Assets, Including Cash Payments Collected, Net Furniture and equipment expenses Equipment Expense [Member] Equipment Expense Third-Party Service Provider Third-Party Service Provider [Member] Third-Party Service Provider Federal Deferred Federal Income Tax Expense (Benefit) Investments in subsidiaries: Investments in Subsidiaries [Abstract] Investments in Subsidiaries [Abstract] CRE Real Estate Loan [Member] Purchases of restricted bank stock Payments To Acquire Federal Home Loan Bank And Federal Reserve Bank Stock Payments To Acquire Federal Home Loan Bank And Federal Reserve Bank Stock Income from dissolution of non-bank subsidiary Income from Dissolution of Non Bank Subsidiaries Income from Dissolution of Non Bank Subsidiaries Auditor Name Auditor Name Impairment charges Mortgage Servicing Rights, Accumulated Impairment Mortgage Servicing Rights, Accumulated Impairment SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION Supplemental Cash Flow Information [Abstract] Valuation allowance, deferred tax assets Operating Loss Carryforwards, Valuation Allowance Other Performance Measure, Amount Other Performance Measure, Amount Weighted- Average Exercise Price Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Fractional shares, payment rate (in dollars per share) Business Combination, Fractional Shares, Payment Rate Per Share Business Combination, Fractional Shares, Payment Rate Per Share Investment Securities Marketable Securities, Policy [Policy Text Block] 2026 Lessor, Operating Lease, Payment to be Received, Year One Related Party [Domain] Related and Nonrelated Parties [Domain] OREO and other repossessed assets OREO and other repossessed assets at January 1 OREO and other repossessed assets at December 31 Repossessed Assets Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract] Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract] Derivative Instrument [Axis] Derivative Instrument [Axis] Restricted cash Restricted Cash Fair Value of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Financial liabilities Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Derivative Financial Instruments Derivatives, Reporting of Derivative Activity [Policy Text Block] Credit Loss Status [Axis] Credit Loss Status [Axis] Entity [Domain] Entity [Domain] Net cash provided by investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Schedule of Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Axis] Schedule of Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Axis] Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Dividend equivalents earned (in dollars per share) Share Based Compensation Arrangement by Share Based Payment Award, Equity Instruments Other than Options, Dividend Equivalents Earned, Weighted Average Grant Date Fair Value Weighted average fair value of the dividend equivalents of equity-based award plans other than stock (unit) option plans, earned during the period. Investment in partnerships Effective Income Tax Rate Reconciliation, Equity in Earnings (Losses) of Unconsolidated Subsidiary, Percent Interest Interest Paid, Excluding Capitalized Interest, Operating Activity Document Fiscal Year Focus Document Fiscal Year Focus TSR PSU Awards Total Stockholder Return Performance Shares [Member] Total Stockholder Return Performance Shares Operating leases Operating Lease, Right-of-Use Asset Effective income tax rate Effective Income Tax Rate Reconciliation, Percent Premises and Equipment rent expense Operating Lease, Cost Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract] Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract] Carrying Amount Reported Value Measurement [Member] Plan Name [Domain] Plan Name [Domain] Pre-tax acquisition expenses Business Combination, Acquisition-Related Cost, Expense Period over which cost will be recognized Weighted average period over which expense is to be recognized on awards issued under Busey's 2020 Equity Plan Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Fair Value Debt Securities, Held-to-Maturity, Fair Value, Maturity [Abstract] Number of shares of common stock per award (in shares) Share Based Compensation Arrangement by Share Based Payment Award Number of Shares of Common Stock per Award Represents the number of shares of common stock per award under the equity-based compensation plan. Intersegment noninterest expense Intersegment Noninterest Expense Intersegment Noninterest Expense Valuation allowances Deferred tax assets valuation allowance Deferred Tax Assets, Valuation Allowance Day 1 PCD Financing Receivable, Excluding Accrued Interest, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date Non-accrual Loans Financing Receivable, Nonaccrual OPERATING SEGMENTS AND RELATED INFORMATION Segment Reporting Disclosure [Text Block] Goodwill [Table] Goodwill [Table] Financial assets and financial liabilities measured at fair value Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Not Designated as Hedging Instrument Not Designated as Hedging Instrument [Member] Federal Current Federal Tax Expense (Benefit) Schedule of Other Intangible Asset Disclosures Schedule of Finite Lived Intangible Assets, Roll Forward [Table Text Block] Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, roll forward schedule. Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Data processing Information Technology and Data Processing Unrealized Losses Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] Goodwill and other intangibles assets Finite-Lived Intangible Assets [Line Items] Substandard Non-accrual Doubtful [Member] Pre-tax gain on debt securities Realized Gain On Sale Of Mortgage Servicing Rights, Before Tax Realized Gain On Sale Of Mortgage Servicing Rights, Before Tax Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) Comprehensive Income (Loss) Note [Text Block] Weighted Average Weighted Average [Member] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Net deferred loan origination costs Financing Receivable, Unamortized Loan Cost (Fee) Leases Lessee, Leases [Policy Text Block] Amortization of intangible assets Amortization of Intangible Assets Tax credit investments Tax Credit Investments [Member] Tax Credit Investments Unrealized Gains (Losses) on Debt Securities Available For Sale and Unrealized Gains (Losses) on Cash Flow Hedges AOCI, Accumulated Gain (Loss, Debt Securities, Available-For-Sale, Parent And Accumulated Gain (loss), Net, Cash Flow Hedge, Parent [Member] AOCI, Accumulated Gain (Loss, Debt Securities, Available-For-Sale, Parent And Accumulated Gain (loss), Net, Cash Flow Hedge, Parent Total lease liabilities Leases, Liability Leases, Liability Schedule of Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Depreciation and amortization of premises and equipment Depreciation and amortization expense Depreciation, Depletion and Amortization Count of debt securities in an unrealized or unrecognized loss position Debt Securities, Held To Maturity, Unrealized Loss Position, Number of Positions Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (held to maturity), in unrealized loss position. Residential mortgage-backed securities Residential Mortgage-Backed Securities [Member] Revolving Credit Facility Revolving Credit Facility [Member] Finance leases Present value of net future minimum lease payments Finance lease liabilities Finance Lease, Liability Arrangement Duration Trading Arrangement Duration Derivative, gain (loss), statement of income or comprehensive income [Extensible Enumeration] Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Intersegment interest expense Intersegment Interest Expense Intersegment Interest Expense Expected volatility, maximum Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum Common Equity Tier 1 Capital to Risk Weighted Assets, Amount Common Equity Tier One Risk Based Capital [Abstract] No definition available. Segments [Axis] Segments [Axis] Tier 1 Capital to Risk Weighted Assets, Ratio Banking Regulation, Risk-Based Information [Abstract] Intersegment noninterest income Intersegment Noninterest Income Intersegment Noninterest Income Unrealized loss on cash flow hedge Deferred Tax Assets, Derivative Instruments Local Phone Number Local Phone Number Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Sales Sales of OREO Proceeds from sales of OREO plus net gains or losses on the sales of OREO. Percentage of discount to market price Discount through voluntary payroll deductions (as percentage) Share-Based Compensation Arrangement by Share-Based Payment Award, Discount from Market Price, Purchase Date STOCK-BASED COMPENSATION Share-Based Payment Arrangement [Text Block] Other intangible assets Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Excluding Goodwill Cash and cash equivalents Business Combination, Recognized Asset Acquired, Cash and Cash Equivalent Off-balance sheet credit exposure Off-Balance-Sheet, Credit Loss, Liability Operating income (expense), net Foreclosed Real Estate Income (Expense) Foreclosed Real Estate Income (Expense) Assets Assets Assets [Abstract] Credit Facility [Axis] Credit Facility [Axis] Underlying Security Market Price Change Underlying Security Market Price Change, Percent CrossFirst CrossFirst CrossFirst Bankshares, Inc [Member] CrossFirst Bankshares, Inc Balance at beginning of year Balance at end of year Loans and Leases Receivable, Related Parties Debt Instrument [Axis] Debt Instrument [Axis] Forfeited (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value FAIR VALUE MEASUREMENTS Fair Value Disclosures [Text Block] Banking and Thrift, Other Disclosures [Abstract] Banking and Thrift, Other Disclosure [Abstract] Business Combination [Line Items] Business Combination [Line Items] Credit Facility [Domain] Credit Facility [Domain] Stockholders’ equity Equity, Attributable to Parent [Abstract] Preferred stock phares per depository share (in dollars per share) Preferred Stock, Shares Per Depository Share Preferred Stock, Shares Per Depository Share Proceeds from short-term borrowings Proceeds from Short-Term Debt Repayments Loans and Leases Receivable, Related Parties, Proceeds Vesting percentage (as a percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage Analysis of the changes in loans to related parties Loans and Leases Receivable, Related Parties [Roll Forward] Award holders Share-Based Payment Arrangement, Plan Modification, Number of Grantees Affected Schedule of Loan Modifications for Borrowers Experiencing Financial Difficulty Financing Receivable, Modified [Table Text Block] Repurchase of stock Treasury Stock, Value, Acquired, Cost Method Investment, Name [Axis] Investment, Name [Axis] Interest rate Debt Instrument, Interest Rate, Stated Percentage Other nontaxable or nondeductible Effective Income Tax Rate Reconciliation, Other Tax Exempt Income, Percent Effective Income Tax Rate Reconciliation, Other Tax Exempt Income, Percent 30-59 Days Financial Asset, 30 to 59 Days Past Due [Member] Entity Voluntary Filers Entity Voluntary Filers Number of leases not yet commenced Number Of Leases Not Yet Commenced Number Of Leases Not Yet Commenced Income taxes Components of Income Tax Expense (Benefit), Continuing Operations [Abstract] Commitment to lend Financing Receivable, Modified, Commitment to Lend Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Abstract] Entity Registrant Name Entity Registrant Name Unrealized gains (losses) expected to be reclassified from OCI to interest income Cash Flow Hedge Gain (Loss) to be Reclassified within 12 Months 2020 Equity Plan 2020 Equity Plan [Member] 2020 Equity Plan Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Minimum To Be Well Capitalized Banking Regulation, Total Risk-Based Capital Ratio, Well Capitalized, Minimum Total Capital to Risk Weighted Assets, Ratio Capital to Risk Based Ratios [Abstract] Capital to Risk Based Ratios [Abstract] Other Real Estate [Roll Forward] Other Real Estate [Roll Forward] Bank property held for sale with impairment Alternative Investment, Measurement Input Other State and Local Tax Jurisdiction, Other [Member] Number of finance leases Number Of Finance Leases Number Of Finance Leases Fair value adjustment, remaining balance to be accreted Fair Value Adjustment, Weighted Average Remaining Life, Balance Represents the fair value adjustment is being accreted over their weighted average remaining life balance. Count of debt securities in an unrealized or unrecognized loss position Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions Deposits: Deposits [Abstract] Number of operating segments Number of Operating Segments Unpaid principal balances of loans serviced Mortgage servicing rights Servicing Asset at Fair Value, Amount Net amortization (accretion) of premium (discount) on investment securities Accretion (Amortization) of Discounts and Premiums, Investments Duration of fixed interest rate Duration Of Fixed Interest Rate Term for which interest rate of debt is fixed. Purchases of equity securities Payments to Acquire Equity Securities, FV-NI Investment in partnerships Effective Income Tax Rate Reconciliation, Equity in Earnings (Losses) of Unconsolidated Subsidiary, Amount Related Party [Axis] Related and Nonrelated Parties [Axis] Granted (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Banking Banking Represents information pertaining to Banking segment. Cumulative Effect, Period of Adoption [Axis] Cumulative Effect, Period of Adoption [Axis] Income (loss) before income tax benefit and equity in undistributed (in excess of) net income of subsidiaries Income (Loss) from Continuing Operations before Income Taxes Minority Interest and Distribution from Subsidiaries Represents the sum of operating profit and non operating income or expense before income taxes and distribution by subsidiaries. Exercisable (in shares) Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instruments, Exercisable, Number Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instruments, Exercisable, Number Restatement Determination Date: Restatement Determination Date [Axis] Repayment of other borrowings Repayments of Other Debt Additional right of use assets obtained during the period in exchange for operating lease liabilities Additional Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Additional Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Purchase accounting adjustments Deferred Tax Liabilities, Purchase Accounting Adjustments Amount of deferred tax consequences attributable to taxable temporary differences derived from purchase accounting adjustments. Schedule of the Interest-Rate Swaps Designated as Cash Flow Hedges Schedule of Interest Rate Derivatives [Table Text Block] Due after five years through ten years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years, Amortized Cost Liabilities assumed Business Combination, Recognized Liability Assumed, Liability [Abstract] Name Trading Arrangement, Individual Name Schedule of Short-term Debt [Table] Short-Term Debt [Table] Loans held for sale Loan, Held-for-Sale, Fair Value Disclosure Vested and outstanding at end of period (in dollars per share) Share Based Compensation Arrangement By Share Based Payment Award Equity instruments Other Than Options Vested And Outstanding Weighted Average Grant Date Fair Value The weighted-average fair value of vested and outstanding awards on equity-based plans, excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. Issuance of debt Principal balance Debt Instrument, Face Amount Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Operating expense Operating Costs and Expenses Fair Value Debt Securities, Available-for-sale, Unrealized Loss Position Fair Value [Abstract] Debt Securities, Available-for-sale, Unrealized Loss Position Fair Value Equity consideration transferred Common stock, Preferred stock and Replacement awards Business Combination, Consideration Transferred, Equity Interest Preferred Preferred stock Preferred Stock [Member] Name Awards Close in Time to MNPI Disclosures, Individual Name Interest premium (discount) specific to PCD financial assets Business Combination, Interest (Premium) Discount Specific To PCD Financial Assets Business Combination, Interest (Premium) Discount Specific To PCD Financial Assets Non-vested at beginning of period (in dollars per share) Non-vested at end of period (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Debt securities, accrued interest Debt Securities, Accrued Interest Debt Securities, Accrued Interest ICFR Auditor Attestation Flag ICFR Auditor Attestation Flag Employer matching contribution, percent of employees' gross pay Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay Stock-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Treasury stock at cost Treasury Stock, Value Defined Contribution Plan, Type [Axis] Defined Contribution Plan, Type [Axis] Defined Contribution Plan, Type Tax effect OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax Statements of income Condensed Income Statement [Table Text Block] EMPLOYEE BENEFIT PLANS Employee Benefit Plans Disclosure [Text Block] Disclosure pertaining to the employee benefit plans of the entity. Such plans may include employee stock ownership plans and profit-sharing plans. Other investments in unconsolidated entities Other Investments In Unconsolidated Entities [Member] Other Investments In Unconsolidated Entities Auditor Firm ID Auditor Firm ID State net operating loss carryovers Deferred Tax Assets, Operating Loss Carryforwards, State and Local Segments [Domain] Segments [Domain] Credit Loss Status [Domain] Credit Loss Status [Domain] Statement of Income Location, Balance [Axis] Statement of Income Location, Balance [Axis] DEBT SECURITIES Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Affordable housing partnerships and other investments Deferred Tax Liabilities, Investments Statement of Financial Position Location, Balance [Domain] Statement of Financial Position Location, Balance [Domain] Derivative assets not designated as hedging instruments Mortgage banking derivative assets Derivative Asset [Abstract] Unrealized Gains (Losses) on Debt Securities Available For Sale AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] Other credits Effective Income Tax Rate Reconciliation, Tax Credit, Other, Percent Interest expense Interest Expense, Operating and Nonoperating [Abstract] OTHER REAL ESTATE OWNED AND OTHER REPOSSESSED ASSETS Real Estate Owned [Text Block] Forfeited (in dollars per shares) Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instruments, Forfeited In Period, Weighted Average Exercise Price Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instruments, Forfeited In Period, Weighted Average Exercise Price Purchases of debt securities available for sale Payments to Acquire Debt Securities, Available-for-Sale Cash consideration received (in dollars per share) Business Combination, Cash Consideration Received, Per Share Business Combination, Cash Consideration Received, Per Share Schedule of Amortization Expense Relating to Intangible Assets Finite-Lived Intangible Assets Amortization Expense [Table Text Block] Preferred stock, $0.001 par value, liquidation preference $222,750 at December 31, 2025 and zero at December 31, 2024 Preferred stock, value, issued Preferred Stock, Value, Issued Obligations of states and political subdivisions US States and Political Subdivisions Debt Securities [Member] Accrued interest payable Interest Payable Subordinated notes, net of unamortized issuance costs Subordinated Debt 2024 2023 Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year Total liabilities assumed Business Combination, Recognized Liability Assumed, Liability Subordinated Debt Subordinated Debt [Member] Financial Asset, Aging [Axis] Financial Asset, Aging [Axis] All Executive Categories All Executive Categories [Member] Schedule of the Deferred Tax Assets and Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Series A Non-Cumulative Perpetual Preferred Stock Series A Non-Cumulative Perpetual Preferred Stock [Member] Series A Non-Cumulative Perpetual Preferred Stock Common stock, $0.001 par value Common Stock, Value, Issued Other nontaxable or nondeductible Effective Income Tax Rate Reconciliation, Other Tax Exempt Income, Amount Effective Income Tax Rate Reconciliation, Other Tax Exempt Income, Amount Time deposits by schedule of maturities Time Deposits, Fiscal Year Maturity [Abstract] Finance leases Finance Lease, Right-of-Use Asset, after Accumulated Amortization Interest and fees on loans Interest and Fee Income, Loans and Leases Title and Position [Axis] Title and Position [Axis] Net amortization (accretion) of premium (discount) on FHLB advances and other borrowings Amortization of Discount on Federal Home Loan Bank, Advances Amount of amortized discount on outstanding advances and other borrowings (including trust preferred securities) made and reported by Federal Home Loan Bank (FHLBank). Schedule of Unamortized Debt Issuance Cost Schedule of Unamortized Debt Issuance Cost [Table Text Block] Tabular disclosure of unamortized debt issuance cost. Outstanding commitments and contingent liabilities (see Notes 7 and 18) Commitments and Contingencies Preferred stock, liquidation preference Preferred Stock, Liquidation Preference, Value 2025 charge-off 2024 charge-off Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year, Writeoff Other noninterest expense Other Noninterest Expense, Adjusted Other Noninterest Expense, Adjusted Count of debt securities Total Count Of Debt Securities Total count of debt securities. Business Combination [Axis] Business Combination [Axis] Long-term borrowings Other Long-Term Debt Schedule of Changes in the Company's RSU, PSU, and DSU Awards Schedule of Nonvested Share Activity [Table Text Block] Maximum of holding companies assets retained Maximum Of Holding Companies Assets Retained Represents the asset threshold for Companies to maintain trust preferred securities in capital. Fair value adjustments Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred Interest Income Interest Income [Member] Thereafter Lessor, Operating Lease, Payment to be Received, after Year Five Short-Term Debt [Line Items] Short-Term Debt [Line Items] Schedule of OREO and Other Repossessed Assets Balances Other Real Estate [Table Text Block] Tabular disclosure of other real estate on properties owned. Net deferred tax asset Deferred Tax Assets, Net Cash payments for: Cash Payments [Abstract] No definition available. (Gain) loss on sales of OREO and other repossessed assets Gains (Losses) On Sales Of Other Real Estate And Other Repossessed Assets Gains (Losses) On Sales Of Other Real Estate And Other Repossessed Assets Conversion of Busey ROATCE PSUs to RSUs (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, PSUs to RSUs In Period, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Conversion Of PSUs To RSUs In Period, Weighted Average Grant Date Fair Value PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Portfolio loans, net of ACL Business Combination, Recognized Identifiable Assets Acquired And Liabilities, Financing Receivables Business Combination, Recognized Identifiable Assets Acquired And Liabilities, Financing Receivables 60-89 Days Financial Asset, 60 to 89 Days Past Due [Member] Hedging Designation [Axis] Hedging Designation [Axis] Scenario [Axis] Scenario [Axis] Equity securities Securities Equity Investments [Member] Represents the securities equity investments. Derivative Contract [Domain] Derivative Contract [Domain] Reclassification adjustment for realized (gains) losses on cash flow hedges included in net income Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax Financing Receivable, Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Table] Gross (losses) on debt securities Debt Securities, Available-for-Sale, Realized Loss Due after ten years Debt Securities, Held-to-Maturity, Amortized Cost Excluding Accrued Interest, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year 10 Requisite service periods Share-Based Compensation Arrangement by Share-Based Payment Award, Award Requisite Service Period All Individuals All Individuals [Member] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Residential Residential Real Estate [Member] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Expired (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Expirations Purchases of premises and equipment Payments to Acquire Property, Plant, and Equipment Name Forgone Recovery, Individual Name Share-based compensation, expiration period Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Other Real Estate Owned and Other Repossessed Assets Financing Receivable, Real Estate Acquired Through Foreclosure [Policy Text Block] Deferred Compensation Arrangement with Individual, Postretirement Benefit [Table] Deferred Compensation Arrangement with Individual, Postretirement Benefit [Table] Weighted average rate for securities sold under agreements to repurchase Debt, Weighted Average Interest Rate Cash and cash equivalents: Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation [Abstract] Trust Assets Assets Held in Trust [Policy Text Block] Disclosure of accounting policy for assets under care held for customers, that are not included in the Company's consolidated financial statements. 2021 charge-off 2020 charge-off Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff Other Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent, Alternative [Abstract] Debt Securities, Held-to-Maturity [Table] Debt Securities, Held-to-Maturity [Table] Schedule of Notional Amount and Fair Value of Risk Participation Agreement Schedule of Derivative Instruments [Table Text Block] (Increase) decrease in interest expense on swap transactions Interest Expense, Interest-Bearing Liability, Increase (Decrease) Realized net gains (losses) on the sale of mortgage servicing rights (Gain) loss on sales of mortgage servicing rights Gain (Loss) On Sales Of Mortgage Servicing Rights (MSR) Gain (Loss) On Sales Of Mortgage Servicing Rights (MSR) Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Intangible Asset, Finite-Lived [Table] Intangible Asset, Finite-Lived [Table] Held to Maturity Held to Maturity, Debt Securities in Unrealized Loss Position [Abstract] N/A Dividends from subsidiaries: Dividend Income, Operating [Abstract] Weighted average rate: receive-fixed Derivative, Average Fixed Interest Rate Total Gross unrealized or unrecognized losses on debt securities Debt Securities, Held-to-Maturity, Unrealized Loss Position, Accumulated Loss Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Derivative liabilities not designated as hedging instruments Mortgage banking derivative liabilities Derivative Liability [Abstract] Commercial loans Commercial Portfolio Segment [Member] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Tax credits Deferred Tax Assets, Tax Credit Carryforwards Revenue (net interest income plus noninterest income) Business Combination, Pro Forma Information, Pro Forma Revenue LEASES Lessor, Operating Leases [Text Block] Ratio of gross unrealized or unrecognized losses to debt securities with gross unrealized or unrecognized losses Available For Sale Securities in Unrealized Loss Positions as Percentage of Aggregate Carrying Value Represents the total number of securities in the investment portfolio which are in an unrealized loss position as a percentage of the aggregate carrying value. Forecast Forecast [Member] Settlement period Share Based Compensation Arrangement by Share Based Payment Award, Award Settlement Period Represents the settlement period of awards, following the earlier of separation from the Board or a change in control of the entity. Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Title of 12(b) Security Title of 12(b) Security Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Provision for credit losses Day 2 Provision for loan losses Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) Due in one year or less Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Amortized Cost OCI: Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Federal Reserve Bank Federal Reserve Bank [Member] Federal Reserve Bank Long-Lived Assets Impairment or Disposal of Long-Lived Assets, Including Intangible Assets, Policy [Policy Text Block] Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value [Table] Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table] Furniture and equipment expenses Equipment Expense Estimated amount due, interest Income Tax Examination, Estimate of Possible Loss, Interest Income Tax Examination, Estimate of Possible Loss, Interest Count of debt securities in an unrealized or unrecognized loss position Debt Securities, Unrealized Loss Position, Number of Positions Total count of debt securities in an unrealized loss position. Earnings Per Share [Abstract] Earnings Per Share [Abstract] 2030 Lessee, Operating Lease, Liability, to be Paid, Year Five Mortgage servicing assets Deferred Tax Liabilities, Mortgage Servicing Rights Federal funds purchased and securities sold under agreements to repurchase Interest Expense, Securities Sold under Agreements to Repurchase Audit Information [Abstract] Audit Information Risk participation agreements purchased Risk Participation Agreement Purchased [Member] Risk Participation Agreement Purchased Schedule of Average Shares Excluded From Computation of Diluted Earnings Per Common Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Pre-tax loss on sale of debt securities available for sale Debt Securities, Available-for-Sale, Realized Loss, Before Tax Debt Securities, Available-for-Sale, Realized Loss, Before Tax Schedule of Interest Income (Expense) Recorded on Swap Transactions Interest Income and Interest Expense Disclosure [Table Text Block] 2023 charge-off 2022 charge-off Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff Schedule of Estimated Useful Lives for Premises and Equipment Schedule of Estimated Useful Lives for Property, Plant and Equipment [Table Text Block] Tabular disclosure of the useful life of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Forfeitures Cash surrender value of bank owned life insurance Cash Surrender Value of Life Insurance Amount of principal redeemed Debt Instrument, Repaid, Principal Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Securities Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Securities Available For Sale Amount of investments in debt and equity securities, available-for-sale, acquired at the acquisition date. Repurchase of stock (in shares) Treasury Stock, Shares, Acquired Thereafter Finance Lease, Liability, to be Paid, after Year Five Award Timing Disclosures [Line Items] Securities sold under agreements to repurchase Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure Measurement Frequency [Domain] Measurement Frequency [Domain] Exercised (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Exercised Right of use assets: Right Of Use Assets [Abstract] Right Of Use Assets 5.25% Notes Maturing December 4, 2030 5.25% Notes Maturing December 4, 2030 [Member] 5.25% Notes Maturing December 4, 2030 State Deferred State and Local Income Tax Expense (Benefit) Receive-fixed, pay-floating Derivative, Gain, (Losses) on Derivative Pay Floating, Receive Fixed Amount of increase (decrease) in the fair value of derivatives pay floating receive fixed recognized in the income statement. Loan Restructuring Modification [Domain] Loan Restructuring Modification [Domain] Portfolio loans (net of ACL of $174,023 at December 31, 2025, and $83,404 at December 31, 2024) Portfolio loans, net Pledged loans Portfolio loans, net Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss Illinois ILLINOIS Fixed to floating interest rate Debt Instrument, Interest Rate During Period Proceeds from sales of mortgage loans Proceeds from Sale, Loan, Mortgage, Held-for-Sale Net income Net income Net Income (Loss) Attributable to Parent Operating lease costs: Operating Lease, Liability [Abstract] Actual Banking Regulation, Total Risk-Based Capital Ratio, Actual Mortgage revenue Gain (Loss) on Sale of Mortgage Loans Schedule of the Reconciliation of Federal and State Income Taxes at Statutory rates to the Income Taxes Included in the Statements of Income Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Activity in the allowance for loan losses Accounts Receivable, Allowance for Credit Loss [Roll Forward] Vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Other Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Purchase of treasury stock Payments for Repurchase of Common Stock Adoption Date Trading Arrangement Adoption Date Reclassifications Reclassification, Comparability Adjustment [Policy Text Block] Brokered time deposits Brokered Time Deposits Represents the amount of brokered time deposits. FHLB borrowings Federal Home Loan Bank Certificates and Obligations (FHLB) [Member] Financing Receivable, Past Due [Table] Financing Receivable, Past Due [Table] CrossFirst Replacement Awards CrossFirst Replacement Awards [Member] CrossFirst Replacement Awards Customer relationship intangible Customer Relationships [Member] Retained earnings Retained Earnings (Accumulated Deficit) Net decrease in loans Net Increase (Decrease) In Financing Receivables, Investing Activities Net Increase (Decrease) In Financing Receivables, Investing Activities Schedule of Stock-based Compensation Expense Share-Based Payment Arrangement, Cost by Plan [Table Text Block] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Safe harbor match expenses Safe Harbor Match Expense [Member] Safe Harbor Match Expense Loans previously charged-off prior to acquisition Business Combination, Loans Previously Charged Off Business Combination, Loans Previously Charged Off Increase in cash surrender value of bank owned life insurance Life Insurance, Corporate or Bank Owned, Change in Value Incremental cost Share-Based Payment Arrangement, Plan Modification, Incremental Cost Other Real Estate, Foreclosed Assets, and Repossessed Assets [Abstract] Other Real Estate, Foreclosed Assets, and Repossessed Assets [Abstract] Class of Stock [Axis] Class of Stock [Axis] Unrealized Gains (Losses) on Cash Flow Hedges Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Dividend income on bank stock Investment Income, Dividend Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Other Deferred Tax Liabilities, Other Total right of use assets Leases, Right-Of-Use Asset Leases, Right-Of-Use Asset Statement [Table] Statement [Table] Schedule of Reconciliation Between the Purchase Price and the Fair Value Business Combination [Table Text Block] Adjustments to reconcile net income to net cash provided by (used in) operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Cash flows provided by (used in) financing activities Cash flows provided by (used in) financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Schedule of Amortized Cost, Unrealized Gains and Losses, and Fair Values of Securities Classified as AFS and HTM Schedule of Available For Sale and Held to Maturity Securities Reconciliation [Table Text Block] Tabular disclosure of the reconciliation of available-for-sale and held to maturity securities from cost basis to fair value. Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Fiscal Year Maturity [Abstract] Bank overdrafts Bank Overdrafts Unrealized losses on securities held to maturity Deferred Tax Asset, Debt Securities, Held-to-Maturity, Unrealized Loss Deferred Tax Asset, Debt Securities, Held-to-Maturity, Unrealized Loss Appraisal of collateral or real estate listing price Appraisal of collateral or real estate listing price Representing information pertaining to Appraisal of collateral or real estate listing price valuation technique used to measure fair value. All Adjustments to Compensation All Adjustments to Compensation [Member] Termination rate assumed (as a percent) Termination Rate Assumed, Percentage Termination Rate Assumed, Percentage Amendment Flag Amendment Flag Fair Value Debt Securities, Available-for-Sale, Fair Value, Fiscal Year Maturity [Abstract] Number of notes Debt Instrument, Number Of Notes Debt Instrument, Number Of Notes STATEMENTS OF INCOME Condensed Income Statements, Captions [Line Items] JUNIOR SUBORDINATED DEBT OWED TO UNCOLSOLIDATED TRUSTS Junior Subordinated Debt Owed to Unconsolidated Trusts Disclosure [Text Block] Disclosure of junior subordinated debt owed to unconsolidated trusts. Gross contractual amounts of acquired receivables Gross contractual receivable for PCD financial assets Business Combination, Acquired Receivable, Purchased without Credit Deterioration, Gross Contractual Amount Termination Date Trading Arrangement Termination Date Interest-bearing deposits Interest-Bearing Deposits in Banks and Other Financial Institutions Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] 2028 Time Deposit Maturities, Year Three Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] Portfolio loans, allowance for credit losses ACL ACL beginning balance ACL ending balance Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest Due in one year or less Debt Securities, Held-to-Maturity, Amortized Cost Excluding Accrued Interest, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, Year One Operating leases Operating Lease, Weighted Average Discount Rate, Percent Schedule of Changes in, the Company's Stock Option Awards Share-Based Payment Arrangement, Option, Activity [Table Text Block] Accruals for payments of interest and penalties Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Schedule of Financial Assets and Financial Liabilities Measured at Fair Value on a Recurring Basis Fair Value, Assets Measured on Recurring Basis [Table Text Block] Weighted average number of common shares outstanding, basic (in shares) Weighted Average Number of Shares Outstanding, Basic Schedule of Computation of Earnings Per Common Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Charge-offs Financing Receivable, Purchased with Credit Deterioration, Allowance for Credit Loss at Acquisition Date Exercisable at end of year (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number Segment Reporting [Abstract] Segment Reporting [Abstract] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Scenario [Domain] Scenario [Domain] Realized net gains (losses) on debt securities Debt Securities, Available-for-Sale, Realized Gain (Loss) Net unrealized holding gains (losses) on debt securities available for sale OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Consolidated Entities [Axis] Consolidated Entities [Axis] Share-based Compensation Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Schedule of Composition of Deposits Schedule of Deposit Liabilities [Table Text Block] Tabular disclosure for deposit liabilities classified by their types and nature. Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Impairment of OREO and other repossessed assets Impairment Impairment expense Impairment of Real Estate Balance outstanding Line of Credit Facility, Fair Value of Amount Outstanding Use of Estimates Use of Estimates, Policy [Policy Text Block] Actual Banking Regulation, Total Capital, Actual Operating cash flows from finance leases Finance Lease, Interest Payment on Liability Financial Instruments Owned and Pledged as Collateral [Table] Financial Instruments Owned and Pledged as Collateral [Table] Long-term borrowings Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Noncurrent Liabilities, Long-Term Debt Excluding Subordinated Notes Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Noncurrent Liabilities, Long-Term Debt Excluding Subordinated Notes Cash dividends paid Payments of Dividends Net occupancy expense of premises Occupancy, Net Net change in unrealized gains (losses) on cash flow hedges, net of tax Derivative, Excluded Component, Gain (Loss), Recognized in Earnings Insider Trading Arrangements [Line Items] Prior Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year Distributions more (less) than net income of subsidiaries Increase (Decrease) From Excess Distributions Increase (Decrease) From Excess Distributions Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] Current Financial Asset, Not Past Due [Member] Exercised (in dollars per shares) Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instruments, Exercises In Period, Weighted Average Exercise Price Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instruments, Exercises In Period, Weighted Average Exercise Price Unrealized Losses Debt Securities, Held-to-Maturity, Unrealized Loss Position, Accumulated Loss [Abstract] Total liabilities Liabilities Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Interest rate lock commitments Interest Rate Lock Commitments [Member] 2030 Finance Lease, Liability, to be Paid, Year Five % of total class of financing receivable Financing Receivable, Excluding Accrued Interest, Modified in Period, to Total Financing Receivables, Percentage Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Mixed consideration (in dollars per share) Business Combination Mixed Consideration Transferred Per Share In Cash Business Combination Mixed Consideration Transferred Per Share In Cash Depository Shares Depository Shares [Member] Depository Shares Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Pre-tax costs to consummate the merger Business Combination, Acquisition Related Costs, Legal, Professional And Consulting Fees Business Combination, Acquisition Related Costs, Legal, Professional And Consulting Fees Cash Payments To Acquire Business, Gross And Other Consideration Transferred Payments To Acquire Business, Gross And Other Consideration Transferred Issuance of preferred stock, net of issuance costs Stock Issued During Period, Value, New Issues Asset-backed securities Asset-Backed Securities [Member] Consolidation Items [Axis] Consolidation Items [Axis] Subordinated notes Interest Expense, Subordinated Notes and Debentures Net accretable purchase accounting adjustments Finance Receivable, Excluding Accrued Interest, Net Accretable Purchase Accounting Adjustments Finance Receivable, Excluding Accrued Interest, Net Accretable Purchase Accounting Adjustments Counterparty Name [Axis] Counterparty Name [Axis] Proceeds from paydowns and maturities of debt securities held to maturity Proceeds from Maturities, Prepayments and Calls of Held-to-Maturity Securities Total stockholders’ equity before treasury stock Stockholders' Equity before Treasury Stock Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] Corporate debt securities Corporate Debt Securities [Member] Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Cash Flows [Extensible Enumeration] Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Cash Flows [Extensible Enumeration] Accounting Standards Update 2023-02 [Member] Secured Overnight Financing Rate (SOFR) [Member]