Financing Receivable, Credit Quality Indicator Line Items [Abstract] Financing Receivable, before Allowance for Credit Loss, by Origination Year [Abstract] Schedule of Trading Securities [Line Items] Debt and Equity Securities, FV-NI [Line Items] Available For Sale Securities [Table Text Block] Debt Securities, Available-for-Sale [Table Text Block] Interest-bearing cash and cash equivalents Interest-bearing cash and cash equivalents Represents money market or interest-bearing cash accounts held in other financial institutions (including the Federal Reserve); federal funds sold to other depository institutions, securities brokers or securities dealers and securities purchased under agreements to resell. Net losses (gains) on financial instruments and other losses (gains), net Realized Investment Gains (Losses) Derivative Assets, Cash Collateral Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash, Offset Against Derivative Asset Award Timing Predetermined Award Timing Predetermined [Flag] Entity File Number Entity File Number Capital Surplus [Member] Additional Paid-in Capital [Member] Interest-bearing deposits: [Abstract] Interest-Bearing Deposit Liabilities [Abstract] Tabular List, Table Tabular List [Table Text Block] Federal and state income taxes Other Comprehensive Income (Loss), Tax Net interest income from external sources Net Interest Income (Expense) from External Sources Amount of interest income, primarily from loans and securities net of interest expense (cost of borrowed funds accounted for as interest) from external sources. Newly Adopted and Pending Accounting Policies [Policy Text Block] New Accounting Pronouncements, Policy [Policy Text Block] Assumptions to Value Mortgage Servicing Rights [Table Text Block] Assumptions to Value Mortgage Servicing Rights [Table Text Block] Assumptions to Value Mortgage Servicing Rights [Table Text Block] Financing Receivable, Allowance for Credit Loss, Writeoff Financing Receivable, Allowance for Credit Loss, Writeoff Number of Visa Class A Shares Visa Class C Shares Are Convertible To Number of Visa Class A Shares Visa Class C Shares Are Convertible To Represents the number of Visa Class A shares that Visa Class B shares held by the Company are convertible to in the 2026 exchange offer. Fair Value of Financial Instruments [Table Text Block] Fair Value, by Balance Sheet Grouping [Table Text Block] Non-interest bearing demand deposits Noninterest-Bearing Deposit Liabilities, Domestic Retail brokerage revenue [Member] Retail brokerage revenue [Member] Retail brokerage revenue [Member] Denominator: [Abstract] Denominator: [Abstract] -- None. No documentation exists for this element. -- Measurement Basis [Axis] Measurement Basis [Axis] Adjustment to Compensation: Adjustment to Compensation [Axis] Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Fees and Commissions Revenue [Text Block] Revenue from Contract with Customer [Text Block] Interest revenue, Investment securities OCI, Debt Securities, Available-for-Sale, Transfer to Held-to-Maturity, Adjustment from AOCI for Amortization of Gain (Loss), before Tax Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Investment Securities, Debt Maturities [Abstract] Debt Securities, Held-to-Maturity, Maturity [Abstract] Fair Value Option Securities [Line Items] Fair Value Option Securities [Line Items] [Line Items] for Fair Value Option Securities [Table] Available-for-sale Securities, Debt Maturities, Over Ten Years, Amortized Cost Basis Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Amortized Cost Derivative Liabilities, Cash Collateral Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Offset Non-vested shares awarded, net (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Adjustment to Compensation, Amount Adjustment to Compensation Amount Change in other assets Increase (Decrease) in Other Operating Assets Principles of Consolidation [Policy Text Block] Consolidation, Policy [Policy Text Block] Share-based compensation Share-Based Payment Arrangement, Noncash Expense Derivative Assets, Notional Derivative Asset, Notional Amount Principal amount of entered judgment against the principal individual and his wife Principal amount of entered judgment against the principal individual and his wife Principal amount of entered judgment against the principal individual and his wife Employee Stock Option Share-Based Payment Arrangement, Option [Member] Misuse of Revenues Pledged to Municipal Bonds Misuse of Revenues Pledged to Municipal Bonds [Member] Misuse of Revenues Pledged to Municipal Bonds [Member] Cash dividends on common stock Dividends, Common Stock, Cash Total shareholders' equity Equity, Attributable to Parent Measurement Frequency [Axis] Measurement Frequency [Axis] Measurement Frequency [Axis] Schedule of Available-for-sale Securities [Table] Debt Securities, Available-for-Sale [Table] Insider Trading Policies and Procedures [Line Items] Investment Securities, Debt Maturities, Single Maturity Date, Net Carrying Value Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date Common Stock, Shares Authorized Common Stock, Shares Authorized Mortgage Finance Mortgage Finance [Member] Mortgage Finance Loss Contingency [Abstract] Loss Contingency [Abstract] Fair Value, Recurring [Member] Fair Value, Recurring [Member] Net change in the fair value of mortgage loan commitments Change in fair value of mortgage loan commitments Represents the change in fair value of mortgage loan commitments during the period. Liabilities and Equity [Abstract] Liabilities and Equity [Abstract] Gain Contingencies [Table] Gain Contingencies [Table] Cash and due from banks Cash and Cash Equivalents, Fair Value Disclosure Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Maximum [Member] Maximum [Member] Net loans and bank premises transferred to repossessed real estate and other assets Real Estate Owned, Transfer to Real Estate Owned Investment Securities, Debt Maturities, without Single Maturity Date, Net Carrying Value Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, without Single Maturity Date General number of days for delivery of loans, for which the price is set by forward sales contracts, minimum (in days) Minimum Number of Days for Delivery of Forward Sales Contracts Represents the minimum number of days from the point of pricing being set to delivery of forward sales contracts. Net loss attributable to non-controlling interests Net Income (Loss) Attributable to Noncontrolling Interest Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value Debt Securities, Available-for-Sale, Unrealized Loss Position Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Financing Receivable, Credit Quality Indicator [Table] Financing Receivable, Credit Quality Indicator [Table] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Net income before taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Financing Receivable, Revolving, Converted to Term Loan Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan Investment Securities, Debt Maturities, without Single Maturity Date, Fair Value Debt Securities, Held-to-Maturity, Maturity, without Single Maturity Date, Fair Value Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Operating Segments [Member] Operating Segments [Member] Comprehensive income (loss) attributable to non-controlling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Total interest expense Interest Expense, Operating Individually measured for impairment, related allowance Financing Receivable, Allowance for Credit Loss, Individually Evaluated Document Fiscal Period Focus Document Fiscal Period Focus Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Award Timing Method Award Timing Method [Text Block] Litigation Case [Domain] Litigation Case [Domain] Award Type Award Type [Axis] Mortgage Banking [Abstract] Mortgage Banking [Abstract] Trading Symbol Trading Symbol Summary of Mortgage Servicing Rights [Abstract] Summary of Mortgage Servicing Rights [Abstract] -- None. No documentation exists for this element. -- Entity Address, City or Town Entity Address, City or Town Restricted equity securities Federal Home Loan Bank Stock and Federal Reserve Bank Stock Weighted average interest rate Weighted Average Interest Rate of Loans Serviced for Others Represents the weighted average interest rate of loans servicedf for others as of the balance sheet date. Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Total fees and commissions revenue Total fees and commissions Total fees and commissions Total fees and commissions earned from providing services such as maintaining: depositor accounts; fiduciary and trust; brokerage and underwriting; mortgage; transaction cards; and other revenue such as bank owned life insurance. Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Capitalized mortgage servicing rights Capitalized mortgage servicing rights Represents non-cash adjustment to reconcile net income related to capitalization of mortgage servicing rights. Borrowed funds Interest Expense, Short-Term Borrowings Accruing Substandard, Min days past due Accruing Substandard, Min days past due Minimum number of days past due when non-graded loans become categorized as Accruing Substandard. Entity Emerging Growth Company Entity Emerging Growth Company Investment Securities (Held-to-Maturity) [Table Text Block] Debt Securities, Held-to-Maturity [Table Text Block] Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 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] Delinquency rate Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Delinquency Rate Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Delinquency Rate Gain (Loss) on Derivatives, Net Derivative, Gain (Loss) on Derivative, Net Mortgage Banking Revenue [Abstract] Mortgage Banking Revenue [Abstract] Mortgage Banking Revenue [Abstract] Trading revenue [Member] Gain loss on trading [Member] Gain loss on trading [Member] Gain (Loss) from Litigation Settlement [Abstract] Gain (Loss) from Litigation Settlement [Abstract] Investment, Proportional Amortization Method, Elected, Statement of Financial Position [Extensible Enumeration] Investment, Proportional Amortization Method, Elected, Statement of Financial Position [Extensible Enumeration] General number of days outstanding for residential mortgage commitments, minimum (in days) Minimum Number of Days Outstanding For Residential Mortgage Commitments Represents represents the typical minimum period for commitment to originate a residential mortgage loan to when the closed loan is sold to an investor. Total other operating revenue Noninterest Income Noninterest Income Common Stock, Shares, Outstanding Common Stock, Shares, Outstanding Investment Securities, Amortized Cost, After Allowance for Credit Loss Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss Investment Securities, Gross Unrealized Loss Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss Loans [Text Block] Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Noninterest Expense [Abstract] Noninterest Expense [Abstract] Disaggregation of Fees and Commissions Revenue [Table Text Block] Disaggregation of Revenue [Table Text Block] Cash and due from banks Cash and Due from Banks Financing Receivable, Nonaccrual, Related Allowance Financing Receivable, Nonaccrual, Related Allowance Amount of financing receivable on nonaccrual status with a related allowance. Class of Financing Receivable [Domain] Class of Financing Receivable [Domain] Net change in unrealized gain (loss) on mortgage loans held for sale Net change in unrealized gain (loss) on mortgage loans held for sale Represents the net change in unrealized gain (loss) on mortgage loans held for sale under fair value option. 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] Accrued interest, taxes, and expense Accounts Payable and Accrued Liabilities Number of days for past due for loan to be considered nonperforming (in days) Number Of Days For Past Due Residential Mortgage Loans Held for Sale Represents the number of days past due for residential mortgage loans held for sale to be reported as delinquent. Pledged Status [Domain] Pledged Status [Domain] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Federal and state income taxes Income Tax Expense (Benefit) Other assets Other Assets Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Dividends Payable, Amount Per Share Dividends Payable, Amount Per Share Cash paid for federal taxes Income Tax Paid, Federal, after Refund Received 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] Investment Securities Debt Securities, Held-to-Maturity, Carrying Value, after Allowance for Credit Loss Amount, after allowance for credit loss, of investment in debt security measured at carrying value which includes net unrealized loss which remains in Accumulated other comprehensive income related to certain securities transferred from the Available for Sale securities portfolio to the investment securities portfolio (held-to-maturity). Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Net cash provided by (used in) operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Proceeds from sales of available-for-sale securities Proceeds from Sale of Debt Securities, Available-for-Sale Other revenue [Member] Financial Service, Other [Member] Subsequent Event [Member] Subsequent Event [Member] Recoveries of loans previously charged off Financing Receivable, Allowance for Credit Loss, Recovery Net interest and dividend 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 Fair Value Measurement, Measured On Non-Recurring Basis, Significant Unobservable Inputs, Quantitative Information [Abstract] Fair Value Measurement, Measured On Non-Recurring Basis, Significant Unobservable Inputs, Quantitative Information [Abstract] Fair Value Measurement, Measured On Non-Recurring Basis, Significant Unobservable Inputs, Quantitative Information [Abstract] Derivative Liabilities, Gross Fair Value Derivative Liability, Subject to Master Netting Arrangement, before Offset Average shares used in computation: [Abstract] Weighted Average Number of Shares Outstanding, Basic [Abstract] Debt Securities, Available-for-sale, Maturity, Amortized Cost, Rolling Maturity [Abstract] Debt Securities, Available-for-Sale, Amortized Cost, Rolling Maturity [Abstract] Equity Components [Axis] Equity Components [Axis] Financing Receivable, Originated, Year Four Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Number of Reportable Segments Number of Reportable Segments Nonaccrual [Member] Nonaccruing substandard and doubtful [Member] Nonaccruing substandard and doubtful [Member] Entity Address, State or Province Entity Address, State or Province Accruing Substandard [Member] Substandard [Member] Total interest and dividend revenue Interest and Dividend Income, Operating Financial Asset, Period Past Due [Domain] Financial Asset, Aging [Domain] Special Mention [Member] Special Mention [Member] Schedule of Residential Mortgage Loans Held For Sale [Table] Schedule of Residential Mortgage Loans Held For Sale [Table] -- None. No documentation exists for this element. -- Individual: Individual [Axis] Dividends paid Payments of Ordinary Dividends, Common Stock Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Amortized Cost Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Amortized Cost Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Entity Interactive Data Current Entity Interactive Data Current Available-for-sale securities Interest Income, Debt Securities, Available-for-Sale, Operating Financing Receivable, Loan Modifications [Line Items] Financing Receivable, Modified [Line Items] Mortgage production revenue [Member] Mortgage production revenue [Member] Mortgage production revenue [Member] Total other operating expense Noninterest Expense Noninterest Expense Net change in demand deposits, transaction deposits, and savings accounts Net change in demand deposits, transaction deposits and savings accounts Net change in demand deposits, transaction deposits and savings accounts Overdraft fee revenue [Member] Overdraft fee revenue [Member] Overdraft fee revenue [Member] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Deposits Interest Expense, Deposits Escrow earnings rate - indexed to rates paid on deposit accounts with comparable average life (in hundredths) Servicing Assets At Fair Value Assumptions Used To Estimate Fair Value Escrow Earnings Rate The escrow earning rate used to estimate the fair value of servicing assets, based on rates paid on deposit accounts. Entity Central Index Key Entity Central Index Key PEO Name PEO Name Gain (loss) on derivatives, net Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net 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] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Credit losses recognized on residential mortgage loans held for sale Credit losses recognized on residential mortgage loans held for sale Credit losses recognized on residential mortgage loans held for sale Bank Participation in Fraudulent Sale of Securities by Principals [Member] Bank Participation in Fraudulent Sale of Securities by Principals [Member] Bank Participation in Fraudulent Sale of Securities by Principals [Member] Schedule of Credit Quality Indicators [Table Text Block] Financing Receivable Credit Quality Indicators [Table Text Block] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Mortgage loans originated for sale Payment for Origination, Loan, Mortgage, Held-for-Sale Investment Program, Proportional Amortization Method, Elected, Commitment Investment Program, Proportional Amortization Method, Elected, Commitment Investment Securities, Debt Maturities, One to Five Years, Net Carrying Value Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, Rolling after One through Five Years Derivative Liabilities, Netting Adjustments Derivative Liability, Netting Adjustments Represents amount of gross derivative liability positions offset by gross derivative asset positions due to enforceable master netting or similar arrangements. Derivative Contracts [Table Text Block] Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Exercise Price Award Exercise Price Entity Filer Category Entity Filer Category Subsequent Event Type [Axis] Subsequent Event Type [Axis] Change in amount receivable on unsettled available-for-sale securities transactions Change in amount receivable on unsettled security transactions Change in amount receivable on unsettled security transactions. This is an investing cash flow. Current and Past Due Performing Loans Financing Receivable, before Allowance for Credit Loss Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description 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] Entity Address, Address Line One Entity Address, Address Line One Accumulated Other Comprehensive Income (Loss) [Member] AOCI Attributable to Parent [Member] Vesting of non-vested shares (in shares) Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Financing Receivable Revolving Converted to Term Writeoff Financing Receivable, Excluding Accrued Interest, Revolving, Converted to Term Loan, Writeoff Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] Off-Balance Sheet, Credit Loss, Liability [Roll Forward] Off-Balance-Sheet, Credit Loss, Liability [Roll Forward] Credit Commitments [Abstract] Credit Commitments [Abstract] -- None. No documentation exists for this element. -- Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] Derivatives [Text Block] Derivative Instruments and Hedging Activities Disclosure [Text Block] Fair Value as of Grant Date Award Grant Date Fair Value Derivative Instrument Detail [Abstract] Derivative Instrument Detail [Abstract] Investment Securities, Debt Maturities, Less than One Year, Net Carrying Value Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, Rolling within One Year Financing Receivable, Originated, Year Five Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year Personnel Labor and Related Expense Residential non-agency mortgage-backed securities [Member] Mortgage-Backed Securities, Issued by Private Enterprises [Member] Personal trust revenue [Member] Personal trust revenue [Member] Personal trust revenue [Member] Document Quarterly Report Document Quarterly Report Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Financial Instrument Performance Status [Axis] Financial Instrument Performance Status [Axis] Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Financing Receivable, Nonaccrual [Table Text Block] Financing Receivable, Nonaccrual [Table Text Block] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Loans and Leases Receivable, Net Amount [Abstract] Loans and Leases Receivable, Net Amount [Abstract] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Receivables Accrued Investment Income Receivable Loans Insured or Guaranteed by Government Authorities [Domain] Loans Insured or Guaranteed by Government Authorities [Domain] Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Potential Exchange Offer Program Conversion Percentage 2024 Potential Exchange Offer Program Conversion Percentage 2024 Potential Exchange Offer Program Conversion Percentage Residential mortgage loans held for sale, Fair value Fair Value of Residential Mortgage Loans Held for Sale Represents the fair value of residential mortgage loans held for sale as of the balance sheet, exclusive of mortgage commitments and forward sales contracts Investment Securities, Continuous Unrealized Loss Position, Fair Value [Abstract] Debt Securities, Held-to-Maturity, Unrealized Loss Position, Fair Value [Abstract] Loans and Allowances for Credit Losses, Loans [Policy Text Block] Policy Loans Receivable, Policy [Policy Text Block] Servicing revenue Mortgage Servicing Fees Servicing fees for loans secured by real property. Non-PEO NEO Non-PEO NEO [Member] Outstanding standby letters of credit Letters of Credit Outstanding, Amount Brokergage and Trading Revenue Trading Gain (Loss) Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Derivative Liabilities, Notional Derivative Liability, Notional Amount Available-for-sale Securities, Gross Unrealized Gain Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax All Award Types Award Type [Domain] Non-controlling interests Equity, Attributable to Noncontrolling Interest Equity Awards Adjustments Equity Awards Adjustments [Member] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Compensation Amount Outstanding Recovery Compensation Amount Foreign exchange contracts [Member] Foreign Exchange Contract [Member] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Estimate of Fair Value, Fair Value Disclosure [Member] Estimate of Fair Value Measurement [Member] Performing [Member] Performing Financial Instruments [Member] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Deposit service charges and fees [Member] Deposit Account [Member] Financing Receivable, Past Due [Line Items] Financing Receivable, Past Due [Line Items] Investment Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract] Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract] Investment, Proportional Amortization Method, Elected, Amount Investment, Proportional Amortization Method, Elected, Amount Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Number of Days Past Due Following Modification to be Considered a Payment Default Number of Days Past Due Following Modification to be Considered a Payment Default Number of days past due following modification to be considered a payment default. Financial Instruments [Domain] Financial Instruments [Domain] Residential mortgage loans guaranteed by U.S. government agencies that became eligible for repurchase during the period Increase in U.S. government guaranteed loans eligible for repurchase Represents the non-cash increase in loans related to the right but not the obligation to repurchases loans previously sold into Ginnie Mae pools based on certain criteria and as such has effectively regained control of the asset and must recognize the loan on the balance sheet. Investment management services and other revenue [Member] Investment management services and other [Member] Investment management services and other [Member] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Net change in restricted equity securities Payments to Acquire Restricted Investments Minimum [Member] Minimum [Member] Pre-judgment interest amount of entered judgment against the principal individual and his wife Pre-judgment interest amount of entered judgment against the principal individual and his wife Pre-judgment interest amount of entered judgment against the principal individual and his wife Net interest and dividend income after provision for credit losses Net interest income after provision for credit losses Interest Income (Expense), after Provision for Loan Loss Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Company Selected Measure Name Company Selected Measure Name Fair Value Measurement [Domain] Fair Value Measurement [Domain] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Automated service charge and other deposit fee revenue [Member] Automated service charge and other deposit fee revenue [Member] Automated service charge and other deposit fee revenue [Member] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Other comprehensive income (loss), before income taxes Other comprehensive income, before income taxes Other Comprehensive Income (Loss), before Tax Net Income (Loss) Available to Common Stockholders, Diluted, Total Net Income (Loss) Available to Common Stockholders, Diluted Stockholders' Equity Note [Abstract] Stockholders' Equity Note [Abstract] Liquidity Discount on Mortgage Loans Qualifying for Sale to US Govt Agencies Liquidity Discount on Mortgage Loans Qualifying for Sale to US Govt Agencies Represents a liquidity discount applied to the market value of mortgage loans qualifying for sale to U.S. government agencies when a mortgage loan is ineligible for sale to U.S. government agencies. Past Due 90 Days or More and Accruing Financing Receivable, 90 Days or More Past Due, Still Accruing Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Disclosure [Text Block] Investment Securities, Debt Maturities, Six to Ten Years, Net Carrying Value Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Net proceeds from derivative asset contracts Payments for (Proceeds from) Derivative Instrument, Investing Activities Institutional trust & retirement plan services revenue [Member] Institutional trust & retirement plan services revenue [Member] Institutional trust & retirement plan services revenue [Member] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Mortgage servicing revenue [Member] Mortgage servicing revenue [Member] Mortgage servicing revenue [Member] Entity Small Business Entity Small Business Investment Securities, Debt Maturities, Less Than One Year, Fair Value Debt Securities, Held-to-Maturity, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value Trading Securities, Net Unrealized Gain (Loss) Trading Securities, Net Unrealized Gains (Losses) Represents the unrealized holding gain or loss included in the fair value of trading securities as of the balance sheet date. Other Cost and Expense, Operating Other Cost and Expense, Operating Investment Securities, Debt Maturities, Net Carrying Value [Abstract] Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity [Abstract] Fair value option securities Fair value option securities, Fair Value Fair value option securities Fair value option securities represent securities the Company has elected to carry at fair value and separately identified on the balance sheet with changes in fair value recognized in earnings as they occur. Certain residential mortgage-backed securities issued by US government agencies are held as an economic hedge of changes in the fair value of mortgage servicing rights and related derivative contracts. In addition, other securities may be held to manage interest rate risk or for deferred compensation purposes. Securities held for interest rate risk management may be economically hedged by derivative contracts not designated as hedging instruments effectively modify these fixed rate securities into variable rate securities. Document Transition Report Document Transition Report Variable Interest Entity [Line Items] Other Commitments [Abstract] Underlying Securities Award Underlying Securities Amount Equity Component [Domain] Equity Component [Domain] Loans and Allowances for Credit Losses, Maximum No of Days After Which Past Due Non-Risk Graded Loans Are Charged Off Max Number of Days After Which Past Due Non-Risk Graded Loans Are Charged Off Maximum number of days after which past due non-risk graded loans are charged off Document Period End Date Document Period End Date Commercial Banking [Member] Commercial Banking [Member] Business segment-commercial banking customers. Net change in time deposits Increase (Decrease) in Time Deposits Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Derivative Liabilities, Fair Value, Net [Abstract] Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] Numerator: [Abstract] Numerator: [Abstract] -- None. No documentation exists for this element. -- Total equity Balance, beginning of period Balance, end of period Equity, Including Portion Attributable to Noncontrolling Interest Document Type Document Type Fair Value, Inputs, Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract] Debt Securities, Available-for-Sale, Unrealized Loss Position [Abstract] Earnings Per Share [Text Block] Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Loss Contingencies [Table] Loss Contingencies [Table] Business promotion Marketing and Advertising Expense Product and Service [Axis] Product and Service [Axis] Financing Receivable Revolving Writeoff Financing Receivable, Excluding Accrued Interest, Revolving, Writeoff Fees and commissions revenue from contracts with customers Revenue from Contract with Customer, Excluding Assessed Tax Fees and commissions revenue [Member] Fees and commissions revenue [Member] Fees and commissions revenue [Member] Litigation Status [Domain] Litigation Status [Domain] Statistical Measurement [Axis] Statistical Measurement [Axis] Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff Loans Interest and Fee Income, Loan and Lease, Held-in-Portfolio AOCI, Accumulated Gain (Loss), Debt Securities, Investment Securities Transferred from Available-for-sale, Parent Accumulated Unrealized Gain /Loss on Investment Securities Transferred from AFS [Member] Accumulated Unrealized Gain /Loss on Investment Securities Transferred from AFS Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Issuance of common and treasury stock, net Payment, Tax Withholding, Share-Based Payment Arrangement Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Available-for-sale Securities, Debt Maturities, One to Five Years, Fair Value Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value Net Income (Loss) Available to Common Stockholders, Basic, Total Net Income (Loss) Available to Common Stockholders, Basic Extended Maturity and Interest Rate Reduction Extended Maturity and Interest Rate Reduction [Member] Other borrowed funds Other Liabilities, Fair Value Disclosure Derivative Instruments, Gain (Loss) in Statement of Earnings [Table Text Block] Derivative Instruments, Gain (Loss) [Table Text Block] Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Other losses, net Other gains (losses), net Gain (Loss) on Disposition of Assets Earnings Per Share, Diluted Earnings Per Share, Diluted Earnings Per Share, Diluted FDIC and other insurance Federal Deposit Insurance Corporation Premium Expense Fair Value Option Securities [Table Text Block] Fair Value Option Securities [Table Text Block] [Table Text Block] for Fair Value Option Securities [Table] Residential Mortgage Loan Commitments [Member] Residential Mortgage Loan Commitments [Member] Represent contracts related to mortgage loan commitments to purchase. Dividends [Axis] Dividends [Axis] Treasury stock, shares at cost (in shares) Treasury stock balance, beginning of period (in shares) Treasury stock balance, end of period (in shares) Treasury Stock, Common, Shares Cash paid for state taxes Income Tax Paid, State and Local, after Refund Received Consolidation Items [Domain] Consolidation Items [Domain] Loan servicing costs - annually per loan based upon loan type, performing, minimum (in dollars per loan) Servicing Assets At Fair Value Assumptions Used To Estimate Fair Value Performing Loan Service Cost Minimum The minimum cost to service a performing loan for the period used as a variable in estimating fair value. Wealth Management [Member] Wealth Management [Member] Business segment-wealth management consulting customers. Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items] Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] Additions Servicing Asset at Fair Value, Additions Residential mortgage loans held for sale, nonperforming Residential mortgage loans held for sale, nonperforming Residential mortgage loans held for sale, 90 days past due or impaired. Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Available-for-sale Securities, Debt Maturities, Six to Ten Years, Fair Value Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years, Fair Value Loans Total Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss Investment Securities, Gross Carrying Value Debt Securities, Held-to-Maturity, carrying value Amount of investment in debt security measured at carrying value which includes net unrealized loss which remains in Accumulated other comprehensive income related to certain securities transferred from the Available for Sale securities portfolio to the Investment securities portfolio. Capital calls and distributions, net Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Dividends [Domain] Dividends [Domain] Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value [Table Text Block] Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] Expiration Date Trading Arrangement Expiration Date Gain (loss) on fair value option securities, net Gain (loss) on fair value option securities, net Gain (loss) included in earning for the period related fair value option securities primarily held as an economic hedge of the changes in the fair value of mortgage servicing rights. Change in other liabilities Increase (Decrease) in Other Operating Liabilities Net change in other borrowed funds Proceeds from (Repayments of) Other Debt Fixed Maturity Securities [Member] Fixed Income Securities [Member] Change in fair value of mortgage servicing rights Change in fair value of mortgage servicing rights due to market assumption changes Mortgage Servicing Rights (MSR) Impairment (Recovery) Premises and equipment, net Property, Plant and Equipment, Net Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Gain Contingencies, Nature [Axis] Gain Contingencies, Nature [Axis] Entity Current Reporting Status Entity Current Reporting Status Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Special Mention, Max number days past due Special Mention, Max number days past due Maximum number of days a non-graded loan may be past due and categorized as Special Mention Financial Instrument [Axis] Financial Instrument [Axis] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Executive Category: Executive Category [Axis] Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Current Fiscal Year End Date Current Fiscal Year End Date Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Total deposits Deposits Forward sales contracts [Member] Forward sales contracts [Member] Represents forward contracts to purchase mortgage loans. Schedule of Loans by Portfolio Segment [Table Text Block] Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Investment securities, net of allowance Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss Professional fees and services Professional Fees Derivative contracts, net Derivative Liabilities, Fair Value, Net of Cash Collateral Derivative contracts, net of cash collateral, Liabilities, Fair Value Derivative Liability Acquisitions Servicing Asset at Fair Value, Acquisitions The value of new servicing assets, subsequently measured at fair value, acquired during the current period through purchases of financial assets. Other 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 [Member] Pass [Member] Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss Fair Value Assets And Liabilities Measured On A Recurring Basis [Table Text Block] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Corporate trust revenue [Member] Corporate trust revenue [Member] Corporate trust revenue [Member] Visa Membership Visa Membership [Member] Banks membership in the Visa network and it proportionate share of covered liabilities and benefits. Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Schedule of Investment (Held-to-Maturity) Securities [Line Items] Schedule of Held-to-Maturity Securities [Line Items] Summary of Loans by Aging Status [Table Text Block] Financing Receivable, Past Due [Table Text Block] Net cash provided by (used in) financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Measure: Measure [Axis] Valuation Approach and Technique [Axis] Valuation Approach and Technique [Axis] Receivable on unsettled securities sales Receivable from Broker-Dealer and Clearing Organization Derivative, Net fair value Derivative, Fair Value, Net Investment Securities, Debt Maturities, Six to Ten Years, Fair Value Debt Securities, Held-to-Maturity, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years, Fair Value Services [Member] Services [Member] Class of financing receivables related to services industry Personal [Member] Consumer Portfolio Segment [Member] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Loans and Allowances for Credit Losses, Minimum No of Days After Which Past Due Non-Risk Graded Loans Are Charged Off Minimum Number of Days After Which Past Due Non-Risk Graded Loans Are Charged Off Minimum number of days after which past due non-risk graded loans are charged off Available-for-sale Securities, Debt Maturities, Over Ten Years, Fair Value 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 Discounted Cash Flow [Member] Valuation Technique, Discounted Cash Flow [Member] Financing Receivable, Originated, Year Four Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff Provision Details [Abstract] Provision Details [Abstract] Provision Details [Abstract] Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Fair Value Mortgage Banking Activities [Text Block] Mortgage Banking Activities [Text Block] Mortgage Banking Activities [Text Block] Loan receivables disclosure [Abstract] Loans and Leases Receivable Disclosure [Abstract] Outstanding principal accrued interest and other amounts upon sale of facilities securing payment of the bonds Outstanding principal accrued interest and other amounts upon sale of facilities securing payment of the bonds Outstanding principal accrued interest and other amounts upon sale of facilities securing payment of the bonds Common Stock, Shares, Issued Common Stock, Shares, Issued TransFund EFT network revenue [Member] TransFund EFT network revenue [Member] TransFund EFT network revenue [Member] General number of days for delivery for loans, for which the price is set by forward sales contracts, maximum (in days) Maximum Number of Days for Delivery of Forward Sales Contracts Represents represents the typical maximum number of days from the point pricing is set to delivery of forward sales contracts. Commercial agency mortgage-backed securities [Member] Commercial Mortgage-Backed Securities [Member] Asset Pledged as Collateral with Right Asset Pledged as Collateral with Right [Member] Residential agency mortgage-backed securities [Member] Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] Trading Arrangement: Trading Arrangement [Axis] Reclassification Adjustments Included in Earnings [Abstract] Reclassification Adjustments Included in Earnings [Abstract] Reclassification Adjustments Included in Earnings [Abstract] Total Shareholder Return Amount Total Shareholder Return Amount Marketability Adjustment off Fair Value of OREO as Percentage of Unpaid Principal Balance [Member] Marketability Adjustment off Fair Value of OREO as Percentage of Unpaid Principal Balance Marketability Adjustment off of the Fair Value of Real Estate and Other Repossessed Assets as Percentage of Unpaid Principal Balance Loss Contingencies [Line Items] Loss Contingencies [Line Items] Funds Management and Other [Member] Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Security Exchange Name Security Exchange Name Document and Entity Information [Abstract] Document and Entity Information [Abstract] Document and Entity Information [Abstract] Investment Securities, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions Held-to-Maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions Loan servicing costs - annually per loan based upon loan type, performing, maximum (in dollars per loan) Servicing Assets At Fair Value Assumptions Used To Estimate Fair Value Performing Loan Service Cost Maximum The maximum cost to service a performing loan for the period used as a variable in estimating fair value. Derivative Assets, Fair Value, Net [Abstract] Derivative Asset, Subject to Master Netting Arrangement, before Offset of Collateral [Abstract] Energy contracts [Member] Energy Related Derivative [Member] Repurchase of common stock (in shares) Stock Repurchased During Period, Shares Fair Value by Asset Class [Domain] Asset Class [Domain] Mortgage Banking Revenue [Table Text Block] Mortgage Banking Revenue [Table Text Block] Mortgage Banking Revenue [Table Text Block] Restricted equity securities Interest and Dividend Income, Securities, Operating, Other Statement [Line Items] Statement [Line Items] Assets, Average Outstanding Assets, Average Outstanding Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Outstanding commitments to extend credit Unused Commitments to Extend Credit Common Stock [Member] Common Stock [Member] Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Servicing Asset at Fair Value, Amount [Roll Forward] Servicing Asset at Fair Value, Amount [Roll Forward] Statistical Measurement [Domain] Statistical Measurement [Domain] Judicial Ruling Judicial Ruling [Member] Asset Class [Axis] Asset Class [Axis] Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Interest rate contracts [Member] Interest Rate Swap [Member] Cash surrender value of bank-owned life insurance Bank Owned Life Insurance Investment Securities, Continuous Unrealized Loss Position, Fair Value Debt Securities, Held-to-Maturity, Unrealized Loss Position, Fair Value Gain Contingencies [Line Items] Gain Contingencies [Line Items] Pledged Status [Axis] Pledged Status [Axis] Vesting of non-vested shares Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation Available-for-sale Securities, Gross Unrealized Loss Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Earnings Per Share, Basic Earnings Per Share, Basic Earnings Per Share, Basic Financing Receivable, Nonaccrual [Table] Financing Receivable, Nonaccrual [Table] Other comprehensive income (loss), net of income taxes Other comprehensive income (loss) Other comprehensive income, net of income taxes Other Comprehensive Income (Loss), Net of Tax Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Prepayment Speed Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Prepayment Speed Reportable Segments [Table Text Block] Schedule of Segment Reporting Information, by Segment [Table Text Block] Dividends Payable, Date to be Paid Dividends Payable, Date to be Paid Available-for-sale Securities, Debt Maturities, Average Expected Life of Mortgage-backed Securities Debt Securities, Available-for-sale Securities, Debt Maturities, Average Expected Life of Mortgage-backed Securities The calculated weighted-average expected life of mortgage-backed securities based on prepayment assumptions as of the balance sheet date. Residential mortgage loans held for sale Interest and Fee Income, Loan, Mortgage, Held-for-Sale Change in the fair value of mortgage servicing rights due to principal payments Change in fair value of mortgage servicing rights due to loan runoff Represents the non-cash decrease in net pre-tax net income related to the change in fair value of mortgage servicing rights due to loan runoff Investment Securities, Gross Unrealized Gain Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain Measurement Input Type [Domain] Measurement Input Type [Domain] Fair Value Assets Measured on Nonrecurring Basis [Table Text Block] Fair Value Measurements, Nonrecurring [Table Text Block] Loans charged off Financing Receivable, Allowance for Credit Loss, Writeoff Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff Data processing and communications Communications and Information Technology Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Proceeds from disposition of assets Proceeds from Sale of Productive Assets Activity in Capitalized Mortgage Servicing Rights [Table Text Block] Schedule of Servicing Assets at Fair Value [Table Text Block] Accounts and Financing Receivables [Table] Accounts and Financing Receivables [Table] Trading securities Debt Securities, Trading, and Equity Securities, FV-NI Interest revenue [Abstract] Interest Income (Expense), Operating [Abstract] Related allowance [Abstract] Related Allowance [Abstract] -- None. No documentation exists for this element. -- Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Hedging Designation [Domain] Hedging Designation [Domain] Residential mortgage loans held for sale Financing Receivable, Held-for-Sale, Not Part of Disposal Group, after Valuation Allowance Total liabilities and equity Liabilities and Equity Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) [Table] Servicing Assets at Fair Value, Assumptions Used to Estimate Fair Value [Abstract] Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value [Abstract] Other operating revenue [Abstract] Other Nonoperating Income (Expense) [Abstract] Accounting Policies [Abstract] Accounting Policies [Abstract] Healthcare [Member] Health Care [Member] Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract] Derivative, Gain (Loss) on Derivative, Net [Abstract] Treasury Stock, Common Treasury Stock, Common [Member] Financing Receivable, Originated, Year One Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year Dividends Payable [Line Items] Dividends Payable [Line Items] Pay vs Performance Disclosure [Line Items] Net interest income (expense) from internal sources Net Interest Income (Expense) from Internal Sources Amount of interest income earned or paid on funds loaned to or borrowed from the funds management unit net of interest expense (cost of borrowed funds accounted for as interest) from internal sources. Conveyance of other real estate owned guaranteed by U.S. government agencies Conveyance of other real estate owned guaranteed by US govt Represents non-cash conveyance of other real estate owned guaranteed by U.S. government agencies during period. Customer hedging revenue [Member] Customer hedging revenue [Member] Customer hedging revenue [Member] 90 Days or More [Member] Financial Asset, Equal to or Greater than 90 Days Past Due [Member] Liabilities: [Abstract] Liabilities [Abstract] Consumer Banking [Member] Consumer Banking [Member] Business segment-consumer banking customers. Merchant services revenue [Member] Merchant services revenue [Member] Merchant services revenue [Member] Financing Receivable, Originated, Year Three 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 Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year, Writeoff Comprehensive income (loss) attributable to BOK Financial Corporation shareholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent Measurement Input Type [Axis] Measurement Input Type [Axis] Name Measure Name Proceeds from maturities or redemptions of available-for-sale securities Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale Financing Receivable, Nonaccrual [Line Items] Financing Receivable, Nonaccrual [Line Items] Transaction card revenue [Member] Transaction card revenue [Member] Transaction card revenue [Member] Available-for-sale Securities, Debt Maturities [Abstract] Available-for-Sale Securities, Debt Maturities [Abstract] Total assets Assets US Government Agency Insured Loans [Member] US Government Agency Insured Loans [Member] Financing Receivable, Credit Quality Indicator [Line Items] Financing Receivable, Credit Quality Indicator [Line Items] Financing Receivable, Allowance for Credit Loss [Roll Forward] Financing Receivable, Allowance for Credit Loss [Roll Forward] Pledged Securities Debt Securities Cash Flows From Operating Activities: [Abstract] Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Debt Securities, Held-to-maturity [Abstract] Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss [Abstract] Available-for-sale Securities, Debt Maturities, One to Five Years, Amortized Cost Basis Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Amortized Cost Investment Securities, Fair Value Investment Securities, Fair Value Debt Securities, Held-to-Maturity, Fair Value Dividends Payable, Date Declared Dividends Payable, Date Declared Dividends declared per share Dividends declared (in dollars per share) Common Stock, Dividends, Per Share, Declared Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Summary of Mortgage Servicing Rights [Table Text Block] Summary of Mortgage Servicing Rights [Table Text Block] Tabular disclosure of the summary of residential mortgage servicing rights as measured at balance sheet date. PEO PEO [Member] Primary secondary mortgage rate spread Primary secondary mortgage rate spread Mortgage rate spread between the primary and secondary market. Trading Securities, Fair Value Trading securities Debt Securities, Trading Available-for-sale Securities, Debt Maturities, Less than One Year, Fair Value Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value Time Time deposits Time Deposits Retained Earnings [Member] Retained Earnings [Member] Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement [Abstract] Income Statement [Abstract] Derivative contracts, net Derviative contracts, net of cash collateral, Assets, Fair value Derviative contracts, net of cash collateral, Assets, Fair value Derivative Asset Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Fair Value, Nonrecurring [Member] Fair Value, Nonrecurring [Member] Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Financing Receivable, Modifications [Table] Financing Receivable, Modified [Table] Provision for off-balance sheet credit risk Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) Product and Service [Domain] Product and Service [Domain] Investment securities [Abstract] Debt Securities, Available-for-sale [Abstract] Debt Securities, Available-for-Sale [Abstract] Equity option contracts [Member] Equity Swap [Member] Dividends Payable, Date of Record Dividends Payable, Date of Record Total Shareholders' Equity [Member] Parent [Member] Net income Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Printing, postage, and supplies Supplies and Postage Expense Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Derivative, Notional Amount Derivative, Notional Amount Financing Receivable, Revolving Financing Receivable, Excluding Accrued Interest, Revolving City Area Code City Area Code Rollforward of Allowance For Loan Losses And Accrual for Off-Balance Sheet Credit Losses [Table Text Block] Financing Receivable, Allowance for Credit Loss [Table Text Block] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Net change in derivative margin accounts Net change in derivative margin accounts The net change in derivative margin accounts. Schedule of Trading Securities [Table] Debt Securities, Trading, and Equity Securities, FV-NI [Table] Recorded investment [Abstract] Recorded Investment [Abstract] -- None. No documentation exists for this element. -- Cash Flows From Investing Activities: [Abstract] Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Other liabilities Other Liabilities Goodwill Goodwill Financing Receivable, Modified in Period, Amount Financing Receivable, Modified in Period, Amount Loans, Number of Days After Notification of Chapter 7 Bankruptcy Non-Risk Graded Loan is Placed on Nonaccruing Status Loans, Number of Days After Notification of Chapter 7 Bankruptcy Non-Risk Graded Loan is Placed on Nonaccruing Status The number of days following notification of a borrowers Chapter 7 bankruptcy that a non-risk graded loan is placed on nonaccruing status. Total customer risk management programs Customer Risk Management Programs [Member] Represents total derivative contracts in customer risk management programs. Available-for-sale Securities, Debt Maturities, Allocated and Single Maturity Date, Fair Value Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration] Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration] Total mortgage production revenue Mortgage Production Revenue Total gain (loss) on mortgage loans held for sale, including mortgage loan commitments and forward sales contracts. Significant Accounting Policies [Text Block] Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Supplemental Cash Flow Information: [Abstract] Supplemental Cash Flow Information [Abstract] Available-for-sale Securities, Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost Internal risk management programs [Member] Internal Risk Management Programs [Member] Represents program to manage interest rate sensitivity, as part of its economic hedge of the changes in the fair value of mortgage servicing rights and as an economic hedge of trading securities. Other Performance Measure, Amount Other Performance Measure, Amount Components of Residential Mortgage Loans Held for Sale [Abstract] Components of Residential Mortgage Loans Held for Sale [Abstract] Represents the individual components of residential mortgage loans held for sale U.S. government securities [Member] US Treasury and Government [Member] Collectively measured for impairment, related allowance Financing Receivable, Allowance for Credit Loss, Collectively Evaluated Investment Securities, Debt Maturities, Average Expected Life of Mortgage-backed Securities Held-to-maturity Securities, Debt Maturities, Average Expected Life of Mortgage-backed Securities The calculated weighted-average expected life of mortgage-backed securities held to maturity based on prepayment assumptions as of the balance sheet date. Litigation Status [Axis] Litigation Status [Axis] Derivative Instrument [Axis] Derivative Instrument [Axis] Net change in restricted equity securities Proceeds from Sale of Restricted Investments Commercial real estate [Member] Commercial Real Estate Portfolio Segment [Member] Capital surplus Additional Paid in Capital, Common Stock Net cash provided by (used in) investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation 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] Loans Insured or Guaranteed by Government Authorities [Axis] Loans Insured or Guaranteed by Government Authorities [Axis] Cash paid for interest Interest Paid, Excluding Capitalized Interest, Operating Activity Loan servicing costs - annually per loan based upon loan type, foreclosure, maximum (in dollars per loan) Servicing Assets At Fair Value Assumptions Used to Estimate Fair Value Foreclosure Loan Service Cost Maximum Servicing Assets At Fair Value Assumptions Used to Estimate Fair Value Foreclosure Loan Service Cost Maximum Document Fiscal Year Focus Document Fiscal Year Focus Basis of Accounting, Policy [Policy Text Block] Basis of Accounting, Policy [Policy Text Block] Carrying (Reported) Amount, Fair Value Disclosure [Member] Reported Value Measurement [Member] Loans, variable rate of interest Loans Receivable with Variable Rates of Interest Derivative Assets, Netting Adjustments Derivative Asset, Netting Adjustments Represents amount of gross derivative asset positions offset by gross derivate liability due to enforceable master netting or similar agreements. Fiduciary and asset management revenue [Member] Fiduciary and Trust [Member] Nonaccrual Nonaccrual Financing Receivable, Nonaccrual Derivatives, Policy [Policy Text Block] Derivatives, Policy [Policy Text Block] Reportable Segments [Text Block] Segment Reporting Disclosure [Text Block] Loans, Number of Days Past Due for a Non-Risk Graded Loan to be Placed on Nonaccruing Status Loans, Number of Days Past Due for a Non-Risk Graded Loan to be Placed on Nonaccruing Status Represents the number of days past due a non-risk graded loan has to be in order to be placed on nonaccruing status. Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Not Designated as Hedging Instrument [Member] Not Designated as Hedging Instrument [Member] U.S. Treasury [Member] US Treasury Securities [Member] Loans and Allowance for Credit Losses [Abstract] Loans and Allowance for Credit Losses [Abstract] Loans and Allowance for Credit Losses [Abstract] Other trading securities [Member] Other debt securities [Member] Other Debt Obligations [Member] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Investment Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract] Debt Securities, Held-to-Maturity, Fair Value, Rolling Maturity [Abstract] Weighted Average [Member] Weighted Average [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value, Recurring and Nonrecurring [Table] Amortization of intangible assets Amortization of Intangible Assets Residential mortgage loans held for sale Loan, Mortgage, Held-for-Sale, Fair Value Disclosure Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Purchases of assets Payments to Acquire Productive Assets Nonperforming Financial Instruments [Member] Nonperforming Financial Instruments [Member] Other Comprehensive Income (Loss), before Tax [Abstract] Other Comprehensive Income (Loss), before Tax [Abstract] Changes due to principal payments Change in fair value due to loan runoff The decrease in fair value as a result of loan runoff. Residential Mortgage Backed Securities [Member] Residential Mortgage-Backed Securities [Member] Investment Securities, Debt Maturities, Over Ten Years, Fair Value Debt Securities, Held-to-Maturity, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Fair Value Arrangement Duration Trading Arrangement Duration Fair Value Option Securities [Table] Fair Value Option Securities [Table] Fair Value Option Securities [Table] Trading Securities, [Table Text Block] Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block] Investment Securities, Continuous Unrealized Loss Position [Abstract] Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position [Abstract] Segments [Axis] Segments [Axis] Local Phone Number Local Phone Number Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Fair value option securities, Net Unrealized Gain (Loss) Fair Value Option Securities Unrealized Gain or Loss Fair Value Option Securities Unrealized Gain or Loss Beginning balance Ending balance Off-Balance-Sheet, Credit Loss, Liability Funds purchased and repurchase agreements Federal Funds Purchased and Securities Sold under Agreements to Repurchase Assets [Abstract] Assets: [Abstract] Assets [Abstract] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Investment Securities, Debt Maturities, One to Five Years, Fair Value Debt Securities, Held-to-Maturity, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value Fair Value Measurements [Text Block] Fair Value Disclosures [Text Block] Shareholders' equity: [Abstract] Equity, Attributable to Parent [Abstract] FDIC special assessment Federal Deposit Insurance Corporation (FDIC) Special Assessment Amount of expense for Federal Deposit Insurance Corporation (FDIC) Special Assessment assessed 30 to 59 Days [Member] Financial Asset, 30 to 59 Days Past Due [Member] Number of Visa Class C Shares in exchange for Class B-2 shares Number of Visa Class C Shares in 2026 exchange for Class B-2 shares Represents the number of Visa Class C Shares that the Company would receive in 2026 exchange for its Class B-2 shares. Loan servicing costs - annually per loan based upon loan type, delinquent, maximum (in dollars per loan) Servicing Assets At Fair Value Assumptions Used to Estimate Fair Value Delinquent Loan Svc Cost Maximum Servicing Assets At Fair Value Assumptions Used to Estimate Fair Value Delinquent Derivative Assets, Gross Fair Value Derivative Asset, Subject to Master Netting Arrangement, before Offset Common Stock Class B-2 Shares Owned Common Stock Visa Class B-2 Shares Owned Number of Visa common class B-2 shares received by exchanging Class B-1 Visa shares under the Visa Exchange Offer Depreciation and amortization Depreciation, Amortization and Accretion, Net Investment securities Interest Income, Debt Securities, Held-to-Maturity Entity Registrant Name Entity Registrant Name Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Gain Contingency, Nature [Domain] Gain Contingency, Nature [Domain] Assets, Fair Value Disclosure Assets, Fair Value Disclosure Provision for credit losses Provision for Loan, Lease, and Other Losses Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions Deposits [Abstract] Deposits [Abstract] Net amortization of discounts and premiums Accretion (Amortization) of Discounts and Premiums, Investments Mortgage servicing rights Beginning balance Ending balance Servicing Asset at Fair Value, Amount Investment Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value Debt Securities, Held-to-Maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value Restatement Determination Date: Restatement Determination Date [Axis] Commercial account service charge revenue [Member] Commercial account service charge revenue [Member] Commercial account service charge revenue [Member] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Available-for-sale Securities, Debt Maturities, Six To Ten Years, Amortized Cost Basis Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years, Amortized Cost Change in amount due on unsettled available-for-sale securities transactions Proceeds from (Payment for) Other Financing Activity Mortgage banking costs Mortgage banking costs Expense related to mortgage banking activities including amortization of capitalized mortgage servicing rights, provision for losses on mortgage loans sold with recourse and other mortgage banking expenses. Name Trading Arrangement, Individual Name Securities, Fair Value Option Securities [Abstract] Securities, Fair Value Option Securities [Abstract] Securities, Fair Value Option Securities [Abstract] Debt Securities, Net Unrealized Loss Remaining in AOCI included in Carrying Value for AFS Securities Transferred to Investment Securities Debt Securities, Net Unrealized Loss Remaining in AOCI included in Carrying Value for AFS Securities Transferred to Investment Securities Debt Securities, Net Unrealized Loss Remaining in AOCI included in Carrying Value for AFS Securities Transferred to Investment Securities Financing Receivable, Modified, Subsequent Default Financing Receivable, Modified, Subsequent Default Segments Reporting Information [Table] Reconciliation of Revenue from Segments to Consolidated [Table] Notional Amount of Derivatives [Abstract] Notional Disclosures [Abstract] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Components of Residential Mortgage Loans Held For Sale [Table Text Block] Residential Mortgage Loans Held For Sale [Table Text Block] Tabular disclosure of mortgage loans to individuals not classified as held for investment but are held-for-sale. Name Awards Close in Time to MNPI Disclosures, Individual Name Collectively measured for impairment, recorded investment Financing Receivable, Collectively Evaluated for Credit Loss Net loss (gain) on mortgage loans held for sale Net loss (gain) on mortgage loans held for sale Represents the combined realized net loss or gain from sale of residential mortgage loans and the change in the unrealized net loss or gain on mortgage loans held for sale during the period. Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Credit Loss [Abstract] Credit Loss [Abstract] Debt Securities, Available-for-sale, Maturity, Fair Value, Rolling Maturity [Abstract] Debt Securities, Available-for-Sale, Maturity, Fair Value, Rolling Maturity [Abstract] Share-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Treasury stock Treasury Stock, Value General number of days outstanding for residential mortgage commitments, maximum (in days) Maximum Number of Days Outstanding For Residential Mortgage Commitments Represents represents the typical maximum period for commitment to originate a residential mortgage loan to when the closed loan is sold to an investor. Litigation Case [Axis] Litigation Case [Axis] Investment Securities, Debt Maturities, Over Ten Years, Net Carrying Value Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years Segments [Domain] Segments [Domain] Securities [Text Block] Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Deposits with no stated maturity Deposits No Stated Maturity Fair Value Disclosure This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. May be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. May be used in both the balance sheet and disclosure in the same submission. Represents time deposits with no stated maturity as presented on the statement of financial position. Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Accumulated Net Unrealized Gain (Loss) on Available for Sale Securities [Member] AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] Interest expense, Operating [Abstract] Interest Expense, Operating and Nonoperating [Abstract] Remaining term (in months) Residential Mortgage Loans Serviced Weighted Average Remaining Term Represents the weighted average remaining term of mortgage loans being serviced fro others. Real estate and other repossessed assets, allowance Real Estate Owned, Valuation Allowance Revenue [Policy Text Block] Revenue [Policy Text Block] Purchases of available-for-sale securities Payments to Acquire Debt Securities, Available-for-Sale Municipal securities [Member] US States and Political Subdivisions Debt Securities [Member] Debt Securities, Trading, and Equity Securities, FV-NI [Abstract] Debt Securities, Trading, and Equity Securities, FV-NI [Abstract] Subordinated debentures Subordinated Debt Financing Receivable, Originated, Year Two Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year Financial Asset, Period Past Due [Axis] Financial Asset, Aging [Axis] All Executive Categories All Executive Categories [Member] Common stock Common Stock, Shares, Outstanding Common Stock, Value, Issued Check card revenue [Member] Check card fee revenue [Member] Check card fee revenue [Member] Less: Earnings allocated to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Visa Class B-2 Conversion Rate Visa Class B-2 Conversion Rate Conversion rate to convert Visa Class B-2 shares to Visa Class A common shares Derivative Liabilities, Net Fair Value Before Cash Collateral Derivative Liability, Net Fair Value Before Cash Collateral Represents net derivative liability before consideration of right to reclasim cash collateral under master netting or similar arrangements. Available-for-sale Securities, Debt Maturities, Weighted Average Maturity Debt Securities, Available-for-sale Securities, Debt Maturities, Weighted Average Maturity Represents the the contractual weighted average maturity (weighted by amount of the security) for this portion of the available-for-sale securities portfolio. Trading securities Interest Income, Debt Securities, Trading, Operating Financing Receivable Year One Originated Current Fiscal Year Writeoff Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year, Writeoff Real estate and other repossessed assets [Member] Fair Value, Real estate and other repossessed assets [Member] Fair Value, Real estate and other repossessed assets [Member] Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Non-Controlling Interests [Member] Noncontrolling Interest [Member] Marketable Securities [Abstract] Marketable Securities [Abstract] Disgorged fees Disgorged fees Represents fees disgorged as a result of a settlement with a regulatory agency. PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount 60 to 89 Days [Member] Financial Asset, 60 to 89 Days Past Due [Member] Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Derivative Assets, Net Fair Value Before Cash Collateral Derivative Assets, Net Fair Value Before Cash Collateral Represents net derivative assets before offsetting the obligation to return cash collateral under a master netting or similar arrangement. Hedging Designation [Axis] Hedging Designation [Axis] Investment securities, Allowance for Credit Loss Debt Securities, Held-to-Maturity, Allowance for Credit Loss Derivative Contract Type [Domain] Derivative Contract [Domain] Financing Receivable, Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Table] Number of residential mortgage loans serviced for others Residential Mortgage Loans Serviced Number Of Loans Indicates the number of mortgage loans being serviced. All Individuals All Individuals [Member] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Change in receivables Increase (Decrease) in Receivables Name Forgone Recovery, Individual Name Net unrealized losses (gains) from derivative contracts Unrealized Gain (Loss) on Derivatives Mortgage banking revenue [Member] Mortgage Banking [Member] 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] Individually measured for impairment, recorded investment Financing Receivable, Individually Evaluated for Credit Loss Financing Receivable, Nonaccrual, No Allowance Financing Receivable, Nonaccrual, No Allowance Number of Visa Class B-3 Shares in exchange for Class B-2 shares Number of Visa Class B-3 Shares in 2026 exchange for Class B-2 shares Represents the number of Visa Class B-3 Shares that the Company would receive in 2026 exchange for its Class B-2 shares. Repurchase of common stock Treasury Stock, Value, Acquired, Par Value Method Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff Debt Securities, Held-to-maturity [Table] Debt Securities, Held-to-Maturity [Table] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss Debt Securities, Held-to-Maturity, Unrealized Loss Position, Accumulated Loss Other borrowings Other Borrowings Commercial [Member] Commercial Portfolio Segment [Member] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Nonaccrual, Min number days past due Nonaccrual, Min number days past due Minimum number of days past due before non-graded loans are categorized as nonaccrual. O2026Q2Dividends O2026Q2Dividends [Member] O2026Q2Dividends Title of 12(b) Security Title of 12(b) Security Provision for loan losses Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) Available-for-sale Securities, Debt Maturities, Less than One Year, Amortized Cost Basis Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Amortized Cost Loss Contingency, Number of Plaintiffs Loss Contingency, Number of Plaintiffs Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value [Table] Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table] Earnings Per Share [Abstract] Earnings Per Share [Abstract] Unpaid principal balance Residential Mortgage Loans Held For Sale Unpaid Principal Balance, Gross Unpaid principal balance of loans held for sale. Accruing Substandard, Max days past due Accruing Substandard, Max days past due Maximum number of days a non-graded loan will be categorized as Accruing Substandard Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff Investment banking revenue [Member] Investment banking revenue [Member] Investment banking revenue [Member] Marketability adjustments of appraised value Marketability adjustments off appraised value [Member] Marketability adjustments off appraised value. Includes consideration of estimated costs to sell which is approximately 10% of the fair value. Corporate card revenue [Member] Corporate card revenue [Member] Corporate card revenue Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Award Timing Disclosures [Line Items] Undistributed Earnings (Loss) Allocated to Participating Securities, Diluted Undistributed Earnings (Loss) Allocated to Participating Securities, Diluted Measurement Frequency [Domain] Measurement Frequency [Domain] Fair Value Inputs, Fair Value Measured On a Nonrecurring Basis, Quantitative Information [Table Text Block] Fair Value Inputs, Fair Value Measured On a Nonrecurring Basis, Quantitative Information [Table Text Block] Fair Value Inputs, Fair Value Measured On a Nonrecurring Basis, Quantitative Information [Table Text Block] Due on unsettled securities purchases Broker-Dealer, Payable to Other Broker-Dealer and Clearing Organization Shareholders' Equity [Text Block] Equity [Text Block] Net change in the fair value of forward sales contracts Change in the fair value of forward sales commitments Represents the change in the fair value of forward sales commitments considered to be derivative instruments during the period. Schedule of Residential Mortgage Loans Held For Sale [Line Items] Schedule of Residential Mortgage Loans Held For Sale [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Loan Restructuring Modification [Domain] Loan Restructuring Modification [Domain] Loans, net of allowance Loans, net of allowance Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss Proceeds from sale of mortgage loans held for sale Proceeds from Sale, Loan, Mortgage, Held-for-Sale Net income attributable to BOK Financial Corporation shareholders Net income attributable to BOK Financial Corp. shareholders Net Income (Loss) Attributable to Parent Trading [Member] Trading [Member] Trading [Member] Pending Litigation [Member] Pending Litigation [Member] Net realized gains on sale of mortgage loans Gain (Loss) on Sale of Mortgage Loans Revenue Not from Contract with Customer Revenue Not from Contract with Customer Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Repurchase of common stock Payments for Repurchase of Common Stock Adoption Date Trading Arrangement Adoption Date Reclassification, Policy [Policy Text Block] Reclassification, Comparability Adjustment [Policy Text Block] Fair value option securities Interest revenue on fair value option securities Interest income from fair value option securities that the Company has elected to carry at fair value and separately identify in the Consolidated Balance Sheets with changes in the fair value recognized in earnings as they occur. Financing Receivable, Past Due [Table] Financing Receivable, Past Due [Table] Loans to individuals [Member] Loans to individuals [Member] Portfolio segment of the company's total financing receivables related to loans to individuals. Retained earnings Retained Earnings (Accumulated Deficit) Residential mortgage [Member] Residential Portfolio Segment [Member] 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] Loans, Number of Days After Notification of Chapter 7 Bankruptcy Non-Risk Graded Loan is Charged Off Loans, Number of Days After Notification of Chapter 7 Bankruptcy Non-Risk Graded Loan is Charged Off Represents the number of days after notification of Chapter 7 bankruptcy for a non-risk graded loan to be charged off Discount rate - risk-free rate plus a market premium (in hundredths) Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Discount Rate Loans, fixed rate of interest Loans Receivable with Fixed Rates of Interest Loan servicing costs - annually per loan based upon loan type, foreclosure, minimum (in dollars per loan) Servicing Assets at Fair Value Assumptions Used to Estimate Fair Value Foreclosure Loan Service Cost Minimum Servicing Assets at Fair Value Assumptions Used to Estimate Fair Value Foreclosure Loan Service Cost Minimum Subsequent Event Type [Domain] Subsequent Event Type [Domain] 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] Statement [Table] Statement [Table] Adjustments to reconcile net income to net cash used in operating activities: [Abstract] Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Investment Securities, Debt Maturities, Weighted Average Maturity Held-to-maturity Securities, Debt Maturities, Weighted Average Maturity Represents the weighted average maturity (weighted by amount of the security) of all securities in this investment type. Cash Flows From Financing Activities: [Abstract] Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Brokerage and trading revenue [Member] Brokerage and trading revenue [Member] Brokerage and trading revenue [Member] Balance, beginning of period (in shares) Balance, end of period (in shares) Shares, Issued Change in trading and fair value option securities Increase (Decrease) in Debt Securities, Trading, and Equity Securities, FV-NI All Adjustments to Compensation All Adjustments to Compensation [Member] Investment Securities, Debt Maturities, Single Maturity Date, Fair Value Debt Securities, Held-to-Maturity, Maturity, Allocated and Single Maturity Date, Fair Value Amendment Flag Amendment Flag Schedule of Accumulated Other Income (Loss) [Abstract] Schedule of Accumulated Other Comprehensive Income [Roll Forward] -- None. No documentation exists for this element. -- Termination Date Trading Arrangement Termination Date Interest-bearing cash and cash equivalents Interest-Bearing Deposits in Banks and Other Financial Institutions Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Allowance for loan losses Beginning balance Ending balance Total Allowance for loan losses Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest Statement [Line Items] Dividends Payable [Table] Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Earnings Per Share [Table Text Block] Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Subsequent Events [Abstract] Subsequent Events [Abstract] Segment Reporting [Abstract] Segment Reporting [Abstract] Transaction Demand Deposit Accounts Loan servicing costs - annually per loan based upon loan type, delinquent, minimum (in dollars per loan) Servicing Assets at Fair Value Assumptions Used to Estimate Fair Value Delinquent Loan Service Cost Minimum Servicing Assets at Fair Value Assumptions Used to Estimate Fair Value Delinquent Loan Service Cost Minimum Net change in unrealized gain (loss) Net change in unrealized gain (loss) 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 Common Stock, Par or Stated Value Per Share Common Stock, Par or Stated Value Per Share Financing Receivable, Nonaccrual, With Allowance Financing Receivable, Nonaccrual, With Allowance Amount of financing receivable on nonaccrual status with an allowance. Outstanding principal balance of residential mortgage loans serviced for others Residential Mortgage Loans Serviced Outstanding Principal Dollar amount of principal outstanding on mortgage loans being serviced. Net occupancy and equipment Occupancy, Net Litigation Settlement, Amount Awarded to Other Party Litigation Settlement, Amount Awarded to Other Party Net payments on derivative liability contracts Payments for (Proceeds from) Derivative Instrument, Financing Activities Special Mention, Minimum number days past due Special Mention, Minimum number days past due Minimum number of days non-graded loans may be past due before considered to be special mention. Subsequent Events [Text Block] Subsequent Events [Text Block] Insider Trading Arrangements [Line Items] Financing Receivable, Originated, More Than Five Years Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year Financial Asset, Not Past Due Financial Asset, Not Past Due [Member] Investment Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract] Debt Securities, Held-to-Maturity, Unrealized Loss Position, Accumulated Loss [Abstract] Total liabilities Liabilities Energy [Member] Energy [Member] Class of financing receivables related to energy industry Available-for-sale Securities, Debt Maturities, Allocated and Single Maturity Date, Amortized Cost Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost General business [Member] General business member [Member] General business member [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Change in fair value due to market assumption changes Asset at Fair Value, Changes in Fair Value Resulting from Changes in Assumptions Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Loans originated, net of principal collected Payments for (Proceeds from) Loans and Leases Financial Instrument Performance Status [Domain] Financial Instrument Performance Status [Domain] Savings Deposits, Savings Deposits Real estate and other repossessed assets, net of allowance Other Real Estate, Foreclosed Assets, and Repossessed Assets Consolidation Items [Axis] Consolidation Items [Axis] Subordinated debentures Interest Expense, Subordinated Notes and Debentures Proceeds from maturities or redemptions of investment securities Proceeds from Maturities, Prepayments and Calls of Held-to-Maturity Securities Available-for-sale securities Available-for-sale Securities, Fair Value Debt Securities, Available-for-Sale Interest-bearing cash and cash equivalents Interest Income, Domestic Deposits Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] Total mortgage banking revenue Mortgage banking revenue Noninterest income derived from the sale and changes in fair value of residential mortgage loans held for sale and fees for servicing of residential mortgage loans held by third parties. Also includes changes in the fair value of residential mortgage loan commitments and forward sales commitments considered to be derivative instruments. Corporate Expense Allocations Corporate Expense Allocations Represent allocation of corporate expenses to segments Chief Executive Officer [Member]