Earnings Per Share [Abstract] Earnings Per Share [Text Block] Earnings Per Share [Text Block] Revenue from Contract with Customer [Abstract] Disaggregation of Fees and Commissions Revenue [Table Text Block] Disaggregation of Revenue [Table Text Block] Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract] Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract] Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value [Table] Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value [Table] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] U.S. Treasury [Member] US Treasury Securities [Member] Residential agency mortgage-backed securities [Member] Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] Commercial mortgage-backed securities guaranteed by U.S. government agencies [Member] Commercial Mortgage Backed Securities [Member] Other debt securities [Member] Other Debt Obligations [Member] Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items] Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items] Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions 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 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 Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value Debt Securities, Available-for-sale, Unrealized Loss Position 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 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 Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss Derivative Instrument Detail [Abstract] Derivative Contracts [Table Text Block] Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Derivative Instruments, Gain (Loss) in Statement of Earnings [Table Text Block] Derivative Instruments, Gain (Loss) [Table Text Block] Fair Value Disclosures [Abstract] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value, Recurring and Nonrecurring [Table] Measurement Frequency [Axis] Measurement Frequency [Axis] Measurement Frequency [Domain] Measurement Frequency [Domain] Fair Value, Recurring [Member] Fair Value, Recurring [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 3 [Member] Fair Value, Inputs, Level 3 [Member] U.S. government agency debentures [Member] US Treasury and Government [Member] Municipal and other tax-exempt securities [Member] US States and Political Subdivisions Debt Securities [Member] Asset-backed securities [Member] Asset-backed Securities, Securitized Loans and Receivables [Member] Residential non-agency mortgage-backed securities [Member] Mortgage-backed Securities, Issued by Private Enterprises [Member] 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] Assets: [Abstract] Assets [Abstract] Trading securities Debt Securities, Trading Available for sale securities Debt Securities, Available-for-sale Fair value option securities 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. Residential mortgage loans held for sale Mortgages Held-for-sale, Fair Value Disclosure Mortgage servicing rights Servicing Asset at Fair Value, Amount Derviative contracts, net of cash collateral, Assets, Fair value Derivative Asset Liabilities: [Abstract] Liabilities [Abstract] Derivative contracts, net of cash collateral, Liabilities, Fair Value Derivative Liability 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 Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Statistical Measurement [Axis] Statistical Measurement [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Weighted Average [Member] Weighted Average [Member] Valuation Approach and Technique [Axis] Valuation Approach and Technique [Axis] Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Discounted Cash Flow [Member] Valuation Technique, Discounted Cash Flow [Member] Measurement Frequency [Axis] Fair Value, Nonrecurring [Member] Fair Value, Nonrecurring [Member] Asset Class [Axis] Asset Class [Axis] Fair Value by Asset Class [Domain] Asset Class [Domain] Impaired Loans [Member] Fair Value, Impaired Loans [Member] Fair Value, Impaired Loans [Member] 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] Measurement Input Type [Axis] Measurement Input Type [Axis] Measurement Input Type [Domain] Measurement Input Type [Domain] Management knowledge of Industry [Member] Management knowledge of Industry [Member] Management knowledge of industry and non-real estate collateral including but not limited to recoverable oil and gas reserves, forward-looking commodity prices, estimated operating costs Marketability adjustments off appraised value Marketability adjustments off appraised value [Domain] Marketability adjustments off appraised value [Domain] Recoverable oil and gas reserves, forward-looking commodity prices, and estimated operating costs [Member] Recoverable oil and gas reserves, forward-looking commodity prices, and estimated operating costs [Member] Recoverable oil and gas reserves, forward-looking commodity prices, and estimated operating costs [Member] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Assets, Fair Value Disclosure Assets, Fair Value Disclosure Fair Value of Impaired Loans as Percentage of Unpaid Principal Balance Fair Value of Impaired Loans as Percentage of Unpaid Principal Balance Fair Value of Impaired Loans as Percentage of Unpaid Principal Balance Fair Value Measurement, Percentage of Appraised Value. Minimum Fair Value Measurement, Percentage of appraised value Fair Value Measurement, Percentage of appraised value Commitments and Contingencies Disclosure [Abstract] Schedule of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Other Assets [Member] Other Assets [Member] Other Liabilities [Member] Other Liabilities [Member] Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net Loans and Leases Receivable, Net Amount [Abstract] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Commercial [Member] Commercial Portfolio Segment [Member] Commercial real estate [Member] Commercial Real Estate Portfolio Segment [Member] Residential mortgage [Member] Residential Portfolio Segment [Member] Personal [Member] Consumer Portfolio Segment [Member] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Loan receivables disclosure [Abstract] Loans and Leases Receivable Disclosure [Abstract] Loans, fixed rate of interest Loans Receivable with Fixed Rates of Interest Loans, variable rate of interest Loans Receivable with Variable Rates of Interest Loans, non-accrual Loans and Leases Receivable, Nonperforming, Nonaccrual of Interest Total Loans and Leases Receivable, Gross Accruing loans past due (90 days) Financing Receivable, 90 Days or More Past Due, Still Accruing Credit Commitments [Abstract] Credit Commitments [Abstract] -- None. No documentation exists for this element. -- Outstanding commitments to extend credit Unused Commitments to Extend Credit Outstanding standby letters of credit Letters of Credit Outstanding, Amount Statement of Financial Position [Abstract] Assets [Abstract] Cash and due from banks Cash and Due from Banks Interest-bearing cash and cash equivalents Interest-bearing Deposits in Banks and Other Financial Institutions Trading securities Debt Securities, Trading, and Equity Securities, FV-NI Investment securities Debt Securities, Held-to-maturity Restricted equity securities Federal Home Loan Bank Stock and Federal Reserve Bank Stock Residential mortgage loans held for sale Loans Receivable Held-for-sale, Net, Not Part of Disposal Group Loans Allowance for loan losses Loans and Leases Receivable, Allowance Loans, net of allowance Loans and Leases Receivable, Net Amount Premises and equipment, net Property, Plant and Equipment, Net Receivables Accrued Investment Income Receivable Goodwill Goodwill Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Real estate and other repossessed assets, net of allowance Other Real Estate, Foreclosed Assets, and Repossessed Assets Derivative contracts, net Cash surrender value of bank-owned life insurance Bank Owned Life Insurance Receivable on unsettled securities sales Receivables from Brokers-Dealers and Clearing Organizations Other assets Other Assets Total assets Assets Liabilities and Equity [Abstract] Liabilities and Equity [Abstract] Deposits [Abstract] Deposits [Abstract] Noninterest-bearing demand deposits Noninterest-bearing Deposit Liabilities, Domestic Interest-bearing deposits: [Abstract] Interest-bearing Deposit Liabilities [Abstract] Transaction Demand Deposit Accounts Savings Deposits, Savings Deposits Time Time Deposits Total deposits Deposits Funds purchased and repurchase agreements Federal Funds Purchased and Securities Sold under Agreements to Repurchase Other borrowings Other Borrowings Subordinated debentures Subordinated Debt Accrued interest, taxes and expense Accounts Payable and Accrued Liabilities Derivative contracts, net Due on unsettled securities purchases Broker-Dealer, Payable to Other Broker-Dealer and Clearing Organization Other liabilities Other Liabilities Total liabilities Liabilities Shareholders' equity: [Abstract] Stockholders' Equity Attributable to Parent [Abstract] Common stock Common Stock, Value, Issued Capital surplus Additional Paid in Capital, Common Stock Retained earnings Retained Earnings (Accumulated Deficit) Treasury stock Treasury Stock, Value Accumulated other comprehensive gain (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Total shareholders’ equity Stockholders' Equity Attributable to Parent Non-controlling interests Stockholders' Equity Attributable to Noncontrolling Interest Total equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total liabilities and equity Liabilities and Equity Mortgage Banking [Abstract] Mortgage Banking Activities [Text Block] Mortgage Banking Activities [Text Block] Mortgage Banking Activities [Text Block] Financing Receivable, Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Table] Specific Allowance [Member] Specific Allowance [Member] Financing receivables and related allowance that have been spefically allocated to a portfolio segment. Nonspecific Allowance [Member] Unallocated Financing Receivables [Member] Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Activity in allowance for credit losses [Abstract] Activity In Allowance For Credit Losses [Abstract] -- None. No documentation exists for this element. -- Allowance for loan losses [Roll Forward] Financing Receivable, Allowance for Credit Loss [Roll Forward] Beginning balance Provision for loan losses Provision for Loan and Lease Losses Loans charged off Financing Receivable, Allowance for Credit Loss, Writeoff Recoveries Financing Receivable, Allowance for Credit Loss, Recovery Ending balance Allowance for off-balance sheet credit losses [Abstract] Allowance For Off-Balance Sheet Credit Losses [Abstract] -- None. No documentation exists for this element. -- Allowance for off-balance sheet credit losses [Roll Forward] SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] Beginning balance SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount Provision for off-balance sheet credit losses Provision for Other Credit Losses Ending balance Total provision for credit losses Provision for Loan, Lease, and Other Losses Recorded investment [Abstract] Recorded Investment [Abstract] -- None. No documentation exists for this element. -- Collectively measured for impairment, recorded investment Financing Receivable, Collectively Evaluated for Impairment Individually measured for impairment, recorded investment Financing Receivable, Individually Evaluated for Impairment Related allowance [Abstract] Related Allowance [Abstract] -- None. No documentation exists for this element. -- Collectively measured for impairment, related allowance Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment Individually measured for impairment, related allowance Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment Total Segment Reporting [Abstract] Segments Reporting Information [Table] Reconciliation of Revenue from Segments to Consolidated [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Operating Segments [Member] Operating Segments [Member] Funds Management and Other [Member] Corporate, Non-Segment [Member] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Commercial [Member] Commercial [Member] Business segment-commercial customers. Consumer [Member] Consumer [Member] Business segment-consumer customers. Wealth Management [Member] Wealth Management [Member] Business segment-wealth management consulting customers. Segment Reporting Information [Line Items] Segment Reporting, Revenue Reconciling Item [Line Items] Net interest revenue from external sources NIR (expense) from external sources Amount of interest revenue, primarily from loans and securities net of interest expense (cost of borrowed funds accounted for as interest) from external sources. Net interest revenue (expense) from internal sources NIR (expense) from internal sources Amount of interest revenue 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. Net interest revenue Interest Income (Expense), Net Provision for credit losses Net interest revenue after provision for credit losses Interest Income (Expense), after Provision for Loan Loss Other operating revenue Noninterest Income Other operating expense Noninterest Expense Net direct contribution Net direct contribution Represents net direct contribution of segments prior to corporate expense allocations. Gain (loss) on financial instruments, net Gain (Loss) on Financial Instruments, Net Represents gain (loss) on financial instruments, net, used for segment reporting purposes on a summary basis. Includes those gains and losses from derivative contracts, fair value option securities and available for sale securities. Also includes in other-than-temporary impairment losses recognized in earnings. Change in fair value of mortgage servicing rights Segment Reporting, Change in Fair Value of Mortgage Servicing Rights Represents the change in the fair value of mortgage servicing rights used for segment reporting purposes. Gain (loss) on repossessed assets, net Gain (Loss) on Sale of Assets and Asset Impairment Charges Corporate expense allocations Corporate Expense Allocations Represent allocation of corporate expenses to segments Net income before taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Federal and state income taxes Income Tax Expense (Benefit) Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income attributable to non-controlling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Net income attributable to BOK Financial Corp. shareholders Net Income (Loss) Attributable to Parent Average assets Average Assets for Reporting Period Amount of average assets attributed to the reportable segment for the reporting period. Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Fees and commissions revenue [Member] Fees and commissions revenue [Member] Fees and commissions revenue [Member] Brokerage and trading revenue [Member] Brokerage and trading revenue [Member] Brokerage and trading revenue [Member] Trading revenue [Member] Gain loss on trading [Member] Gain loss on trading [Member] Customer hedging revenue [Member] Customer hedging revenue [Member] Customer hedging revenue [Member] Retail brokerage revenue [Member] Retail brokerage revenue [Member] Retail brokerage revenue [Member] Insurance brokerage revenue [Member] Insurance brokerage revenue [Member] Insurance brokerage revenue [Member] Investment banking revenue [Member] Investment banking revenue [Member] Investment banking revenue [Member] Transaction card revenue [Member] Transaction card revenue [Member] Transaction card revenue [Member] TransFund EFT network revenue [Member] TransFund EFT network revenue [Member] TransFund EFT network revenue [Member] Merchant services revenue [Member] Merchant services revenue [Member] Merchant services revenue [Member] Corporate card revenue [Member] Corporate card revenue [Member] Corporate card revenue Fiduciary and asset management revenue [Member] Fiduciary and Trust [Member] Personal trust revenue [Member] Personal trust revenue [Member] Personal trust revenue [Member] Corporate trust revenue [Member] Corporate trust revenue [Member] Corporate trust revenue [Member] Institutional trust & retirement plan services revenue [Member] Institutional trust & retirement plan services revenue [Member] Institutional trust & retirement plan services revenue [Member] Investment management services and other revenue [Member] Investment management services and other [Member] Investment management services and other [Member] Deposit service charges and fees [Member] Deposit Account [Member] Commercial account service charge revenue [Member] Commercial account service charge revenue [Member] Commercial account service charge revenue [Member] Overdraft fee revenue [Member] Overdraft fee revenue [Member] Overdraft fee revenue [Member] Check card revenue [Member] Check card fee revenue [Member] Check card fee revenue [Member] 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] Mortgage banking revenue [Member] Mortgage Banking [Member] Mortgage production revenue [Member] Mortgage production revenue [Member] Mortgage production revenue [Member] Mortgage servicing revenue [Member] Mortgage servicing revenue [Member] Mortgage servicing revenue [Member] Other revenue [Member] Financial Service, Other [Member] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] 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. Fees and commission revenue not from contracts with customers Fees and commission revenue not from contracts with customers Represents fees and commissions revenue not in the scope of ASC 606, Revenue from Contracts with Customers, related to financial instruments or from contractual rights and obligations within the scope of other applicable accounting guidance. Fees and commissions revenue from contracts with customers Revenue from Contract with Customer, Excluding Assessed Tax Investment securities [Abstract] Debt Securities, Available-for-sale [Abstract] Investment Securities, fair value Debt Securities, Held-to-maturity, Fair Value Allowance for real estate and other repossessed assets Real Estate Owned, Valuation Allowance Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized (in shares) Common Stock, Shares Authorized Common stock, shares issued (in shares) Common Stock, Shares, Issued Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Treasury stock, shares at cost (in shares) Treasury Stock, Shares Financing Receivable, Past Due [Table] Financing Receivable, Past Due [Table] Financial Asset, Period Past Due [Axis] Financial Asset, Period Past Due [Axis] Financial Asset, Period Past Due [Domain] Financial Asset, Period Past Due [Domain] 30 to 59 Days [Member] Financial Asset, 30 to 59 Days Past Due [Member] 60 to 89 Days [Member] Financial Asset, 60 to 89 Days Past Due [Member] 90 Days or More [Member] Financial Asset, Equal to or Greater than 90 Days Past Due [Member] Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] Class of Financing Receivable [Domain] Class of Financing Receivable [Domain] Energy [Member] Energy [Member] Class of financing receivables related to energy industry Services [Member] Services [Member] Class of financing receivables related to services industry Wholesale/retail [Member] Wholesale and retail [Member] Class of financing receivables related to wholesale/retail industry. Manufacturing [Member] Manufacturing [Member] Class of financing receivables related to manufacturing industry. Healthcare [Member] Health Care [Member] Public finance [Member] Public Finance [Member] Class of financing receivables related to public finance Other commercial and industrial [Member] Other Commercial and Industrial [Member] Class of financing receivables related to other commercial and industrial industry. Residential construction and land development [Member] Residential construction and land development [Member] Residential construction and land development [Member] Retail [Member] Retail [Member] Office [Member] Office [Member] Class of financing receivables related for which repayment will come from the sale or rental of office space. Multifamily [Member] Multifamily [Member] Industrial [Member] Industrial [Member] Class of financing receivables for which repayment will come from the sale or rental of industrial facilities. Other commercial real estate [Member] Other Commercial Real Estate [Member] Class of financing receivables for which repyament is expected from the sale or rental of other commercial real estate properties. Permanent mortgage [Member] Permanent Residential Mortgage [Member] Class of financing receivables related to mortgages of permanent residences. Permanent mortgages guaranteed by US government agencies [Member] Permanent Mortgages Guaranteed by US Government Agencies [Member] Class of financing receivables related to mortages for permanent residences guaranteed by U.S. government agencies. Home equity [Member] Home Equity Line of Credit [Member] Financing Receivable, Past Due [Line Items] Financing Receivable, Past Due [Line Items] Financing receivable, recorded investment, aging [Abstract] Financing Receivable, Recorded Investment, Aging [Abstract] Current Financing Receivable, Not Past Due Past Due Financing Receivable, Past Due Nonaccrual Financing Receivable, Nonaccrual Total Derivatives [Text Block] Derivative Instruments and Hedging Activities Disclosure [Text Block] 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. -- Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract Type [Domain] Derivative Contract [Domain] Residential Mortgage Loan Commitments [Member] Residential Mortgage Loan Commitments [Member] Represent contracts related to mortgage loan commitments to purchase. Forward sales contracts [Member] Forward sales contracts [Member] Represents forward contracts to purchase mortgage loans. Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Not Designated as Hedging Instrument [Member] Not Designated as Hedging Instrument [Member] 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. 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. 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. 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. 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. 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. 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. 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 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 Unpaid principal balance Residential Mortgage Loans Held For Sale Unpaid Principal Balance, Gross Unpaid principal balance of loans held for sale. Notional Derivative, Notional Amount 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 Derivative, Net fair value Derivative, Fair Value, Net Statement of Cash Flows [Abstract] Cash Flows From Operating Activities: [Abstract] Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash used in operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Change in fair value of mortgage servicing rights due to market changes Mortgage Servicing Rights (MSR) Impairment (Recovery) 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 Net unrealized losses (gains) from derivative contracts Unrealized Gain (Loss) on Derivatives Share-based compensation Share-based Payment Arrangement, Noncash Expense Depreciation and amortization Depreciation, Amortization and Accretion, Net Net amortization of discounts and premiums Accretion (Amortization) of Discounts and Premiums, Investments Net losses (gains) on financial instruments and other losses (gains), net Realized Investment Gains (Losses) Net gain on mortgage loans held for sale Net gain on mortgage loans held for sale Represents the combined realized net gain from sale of residential mortgage loans and the change in the unrealized net gain on mortgage loans held for sale during the period. Mortgage loans originated for sale Payments for Origination of Mortgage Loans Held-for-sale Proceeds from sale of mortgage loans held for sale Proceeds from Sale of Mortgage Loans Held-for-sale Capitalized mortgage servicing rights Capitalized mortgage servicing rights Represents non-cash adjustment to reconcile net income related to capitalization of mortgage servicing rights. Change in trading and fair value option securities Increase (Decrease) in Debt Securities, Trading, and Equity Securities, FV-NI Change in receivables Increase (Decrease) in Receivables Change in other assets Increase (Decrease) in Other Operating Assets Change in accrued interest, taxes and expense Increase (Decrease) in Other Accounts Payable and Accrued Liabilities Change in other liabilities Increase (Decrease) in Other Operating Liabilities Net cash used in operating activities Net Cash Provided by (Used in) Operating Activities Cash Flows From Investing Activities: [Abstract] Net Cash Provided by (Used in) Investing Activities [Abstract] Proceeds from maturities or redemptions of investment securities Proceeds from Maturities, Prepayments and Calls of Held-to-maturity Securities Proceeds from maturities or redemptions of available for sale securities Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale Purchases of investment securities Payments to Acquire Held-to-maturity Securities Purchases of available for sale securities Payments to Acquire Debt Securities, Available-for-sale Proceeds from sales of available for sale securities Proceeds from Sale of Debt Securities, Available-for-sale 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. Loans originated, net of principal collected Payments for (Proceeds from) Loans and Leases Net payments on derivative asset contracts Payments for (Proceeds from) Derivative Instrument, Investing Activities Acquisitions, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Proceeds from disposition of assets Proceeds from Sale of Productive Assets Purchases of assets Payments to Acquire Productive Assets Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Cash Flows From Financing Activities: [Abstract] Net Cash Provided by (Used in) Financing Activities [Abstract] 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 Net change in time deposits Increase (Decrease) in Time Deposits Net change in other borrowed funds Proceeds from (Repayments of) Debt Net proceeds on derivative liability contracts Payments for (Proceeds from) Derivative Instrument, Financing Activities Net change in derivative margin accounts Net change in derivative margin accounts The net change in derivative margin accounts. Change in amount due on unsettled available for sale securities transactions Proceeds from (Payments for) Other Financing Activities Issuance of common and treasury stock, net Proceeds from Issuance of Common Stock Repurchase of common stock Payments for Repurchase of Common Stock Dividends paid Payments of Ordinary Dividends, Common Stock Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Net increase (decrease) in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents at beginning of period Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents at end of period Supplemental Cash Flow Information: [Abstract] Supplemental Cash Flow Information [Abstract] Cash paid for interest Interest Paid, Excluding Capitalized Interest, Operating Activities Cash paid for taxes Income Taxes Paid, Net Net loans and bank premises transferred to repossessed real estate and other assets Real Estate Owned, Transfer to Real Estate Owned 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. 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. Right-of-use assets obtained in exchange for operating lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Debt Securities, Trading, and Equity Securities, FV-NI [Abstract] Schedule of Trading Securities [Table] Debt Securities, Trading, and Equity Securities, FV-NI [Table] Schedule of Trading Securities [Line Items] Debt and Equity Securities, FV-NI [Line Items] 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. Document and Entity Information [Abstract] Document and Entity Information [Abstract] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Tax Identification Number Entity Address, Address Line One Entity Address, Address Line One Entity Address, City or Town Entity Address, City or Town Entity Address, State or Province Entity Address, State or Province Document Transition Report Document Transition Report Document Quarterly Report Document Quarterly Report Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Emerging Growth Company Entity Emerging Growth Company Entity Bankruptcy Proceedings, Reporting Current Entity Shell Company Entity Small Business Entity Small Business Entity Current Reporting Status Entity Current Reporting Status Entity Interactive Data Current Entity Interactive Data Current Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Document Type Document Type Entity File Number Entity File Number Amendment Flag Amendment Flag Document Period End Date Document Period End Date City Area Code City Area Code Local Phone Number Local Phone Number Entity Address, Postal Zip Code Entity Address, Postal Zip Code Numerator: [Abstract] Numerator: [Abstract] -- None. No documentation exists for this element. -- Less: Earnings allocated to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Numerator for basic earnings per share – income available to common shareholders Net Income (Loss) Available to Common Stockholders, Basic Effect of reallocating undistributed earnings of participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Diluted Numerator for diluted earnings per share – income available to common shareholders Net Income (Loss) Available to Common Stockholders, Diluted Denominator: [Abstract] Denominator: [Abstract] -- None. No documentation exists for this element. -- Weighted average shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic and Diluted Less: Participating securities included in weighted average shares (in shares) Incremental Common Shares Attributable to Participating Nonvested Shares with Non-forfeitable Dividend Rights Denominator for basic earnings per common share (in shares) Weighted Average Number of Shares Outstanding, Basic Dilutive effect of employee stock compensation plans (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Denominator for diluted earnings per common share (in shares) Weighted Average Number of Shares Outstanding, Diluted Basic earnings per share (per share) Earnings Per Share, Basic Diluted earnings per share (per share) Earnings Per Share, Diluted Excludes employee stock options with exercise prices greater than current market price. Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Summary of Mortgage Servicing Rights [Abstract] Summary of Mortgage Servicing Rights [Abstract] -- None. No documentation exists for this element. -- Number of residential mortgage loans serviced for others Residential Mortgage Loans Serviced Number Of Loans Indicates the number of mortgage loans being serviced. 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. 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. 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. Servicing Asset at Fair Value, Amount [Roll Forward] Servicing Asset at Fair Value, Amount [Roll Forward] Beginning balance Additions, net Servicing Asset at Fair Value, Additions Change in fair value due to principal payments Change in fair value due to loan runoff The decrease in fair value as a result of loan runoff. Change in fair value due to market assumption changes Asset at Fair Value, Changes in Fair Value Resulting from Changes in Assumptions Ending balance 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] 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 Prepayment rate - based upon loan interest rate, original term and loan type, minimum Servicing Assets At Fair Value Assumptions Used To Estimate Fair Value Prepayment Speed Minimum The minimum estimated speed of prepayments of principal on financial assets which may be one of the factors applied in estimating the fair value of servicing assets. Prepayment rate - based upon loan interest rate, original term and loan type, maximum Servicing Assets At Fair Value Assumptions Used To Estimate Fair Value Prepayment Speed Maximum The maximum estimated speed of prepayments of principal on financial assets which may be one of the factors applied in estimating the fair value of servicing assets. 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. 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. 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 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 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 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 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. Primary secondary mortgage rate spread Primary secondary mortgage rate spread Mortgage rate spread between the primary and secondary market. Commitments and Contingent Liabilities [Text Block] Commitments and Contingencies Disclosure [Text Block] Leases [Abstract] Operating Lease, Right-of-Use Asset Operating Lease, Right-of-Use Asset Lease, Cost [Abstract] Weighted-average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Weighted-average discount rate operating leases Operating Lease, Weighted Average Discount Rate, Percent Operating lease cost recognized as occupancy and equipment expense Operating Lease, Expense Operating cash flows from operating leases Operating Lease, Payments Short-term Lease, Cost Short-term Lease, Cost Finance Lease, Liability, Payment, Due, Rolling Maturity [Abstract] Finance Lease, Liability, Payment, Due, Rolling Maturity [Abstract] Lessee, Operating Lease, Liability, Payments, Due Next Rolling Twelve Months Lessee, Operating Lease, Liability, Payments, Due Next Rolling Twelve Months Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Two Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Two Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Three Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Three Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Four Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Four Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Five Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Five Lessee, Operating Lease, Liability, Payments, Due after Rolling Year Five Lessee, Operating Lease, Liability, Payments, Due after Rolling Year Five Statement of Comprehensive Income [Abstract] Other comprehensive income (loss) before income taxes: Other Comprehensive Income (Loss), before Tax [Abstract] Net change in unrealized gain (loss) Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, before Tax Reclassification adjustments included in earnings: Reclassification Adjustments Included in Earnings [Abstract] Reclassification Adjustments Included in Earnings [Abstract] Loss (gain) on available for sale securities, net Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Other comprehensive income (loss) before income taxes Other Comprehensive Income (Loss), before Tax Federal and state income taxes Other Comprehensive Income (Loss), Tax Other comprehensive income (loss), net of income taxes Other Comprehensive Income (Loss), Net of Tax Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive income attributable to non-controlling interests Comprehensive income attributable to BOK Financial Corp. shareholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent Debt Securities, Held-to-maturity [Abstract] Debt Securities, Held-to-maturity [Table] Debt Securities, Held-to-maturity [Table] Fixed Maturity Securities [Member] Fixed Income Securities [Member] Schedule of Investment (Held-to-Maturity) Securities [Line Items] Schedule of Held-to-maturity Securities [Line Items] Investments Securities, Amortized Cost Investment Securities, Gross Unrealized Gain Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain Investment Securities, Gross Unrealized Loss Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss Investment Securities, Debt Maturities [Abstract] Debt Securities, Held-to-maturity, Maturity [Abstract] Investment Securities, Debt Maturities, Net Carrying Value [Abstract] Debt Securities, Held-to-maturity, Maturity, Amortized Cost, Net [Abstract] Investment Securities, Debt Maturities, Less than One Year, Net Carrying Value Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Amortized Cost Investment Securities, Debt Maturities, One to Five Years, Net Carrying Value Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Amortized Cost Investment Securities, Debt Maturities, Six to Ten Years, Net Carrying Value Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling after Five Through Ten Years, Amortized Cost Investment Securities, Debt Maturities, Over Ten Years, Net Carrying Value Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Amortized Cost Investment Securities, Debt Maturities, Single Maturity Date, Net Carrying Value Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Amortized Cost Investment Securities, Debt Maturities, without Single Maturity Date, Net Carrying Value Debt Securities, Held-to-maturity, Maturity, without Single Maturity Date, Amortized Cost Investments Securities, Debt Maturities, Amortized Cost Investment Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract] Debt Securities, Held-to-maturity, Maturity, Fair Value, Rolling Maturity [Abstract] 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 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 Investment Securities, Debt Maturities, Six to Ten Years, Fair Value Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling after Five Through Ten Years, Fair Value 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 Investment Securities, Debt Maturities, Single Maturity Date, Fair Value Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Fair Value Investment Securities, Debt Maturities, without Single Maturity Date, Fair Value Debt Securities, Held-to-maturity, Maturity, without Single Maturity Date, Fair Value Investment Securities, Debt Maturities, Fair Value 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. 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. Investment Securities, Continuous Unrealized Loss Position [Abstract] Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position [Abstract] Investment Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract] Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Qualitative Disclosure [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 Investment Securities, Continuous Unrealized Loss Position, Fair Value [Abstract] Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Fair Value [Abstract] 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 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 Investment Securities, Continuous Unrealized Loss Position, Fair Value Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value Investment Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract] Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss [Abstract] 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 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 Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Residential Mortgage Backed Securities [Member] Residential Mortgage Backed Securities [Member] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-sale [Line Items] Available-for-sale Securities, Amortized Cost Debt Securities, Available-for-sale, Amortized Cost Available-for-sale Securities, Gross Unrealized Gain Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Available-for-sale Securities, Gross Unrealized Loss Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax Available-for-sale Securities, Debt Maturities [Abstract] Available-for-sale Securities, Debt Maturities [Abstract] Debt Securities, Available-for-sale, Maturity, Amortized Cost, Rolling Maturity [Abstract] Debt Securities, Available-for-sale, Maturity, Amortized Cost, Rolling Maturity [Abstract] 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 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 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 Five Through Ten Years, Amortized Cost 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 Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Amortized Cost Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Amortized Cost Debt Securities, Available-for-sale, Maturity, Fair Value, Rolling Maturity [Abstract] Debt Securities, Available-for-sale, Maturity, Fair Value, Rolling Maturity [Abstract] 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 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 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 Five Through Ten Years, Fair Value 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 Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Fair Value Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Fair Value 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. 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. Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract] Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract] Available-for-sale Securities, Gross realized gains Debt Securities, Available-for-sale, Realized Gain Available-for-sale Securities, Gross realized losses Debt Securities, Available-for-sale, Realized Loss, Excluding Other-than-temporary Impairment Available-for-sale Securities, Related federal and state income tax expense (benefit) Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax Pledged Assets Separately Reported, Securities Pledged as Collateral, at Fair Value Pledged Assets Separately Reported, Securities Pledged as Collateral, at Fair Value Marketable Securities [Abstract] Securities [Text Block] Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Schedule of Loans by Portfolio Segment [Table Text Block] Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] 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] Schedule of Credit Quality Indicators [Table Text Block] Financing Receivable Credit Quality Indicators [Table Text Block] Summary of Impaired Loans [Table Text Block] Impaired Financing Receivables [Table Text Block] Summary of Loans by Aging Status [Table Text Block] Financing Receivable, Past Due [Table Text Block] 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. Mortgage Banking Revenue [Table Text Block] Mortgage Banking Revenue [Table Text Block] Mortgage Banking Revenue [Table 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. Activity in Capitalized Mortgage Servicing Rights [Table Text Block] Schedule of Servicing Assets at Fair Value [Table 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] Loss Contingency [Abstract] Loss Contingency [Abstract] Loss Contingencies [Table] Loss Contingencies [Table] Litigation Status [Axis] Litigation Status [Axis] Litigation Status [Domain] Litigation Status [Domain] Judicial Ruling [Member] Judicial Ruling [Member] Pending Litigation [Member] Pending Litigation [Member] Litigation Case [Axis] Litigation Case [Axis] Litigation Case [Domain] Litigation Case [Domain] Misuse of Revenues Pledged to Municipal Bonds [Member] Misuse of Revenues Pledged to Municipal Bonds [Member] Misuse of Revenues Pledged to Municipal Bonds [Member] 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] Purchase of facilities from principals subject to SEC New Jersey proceedings [Member] Purchase of facilities from principals subject to SEC New Jersey proceedings [Member] Purchase of facilities from principals subject to SEC New Jersey proceedings [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Litigation Settlement [Abstract] Disgorged fees Disgorged fees Represents fees disgorged as a result of a settlement with a regulatory agency. Litigation Settlement, Amount Awarded to Other Party Litigation Settlement, Amount Awarded to Other Party Loss Contingency, Number of Plaintiffs Loss Contingency, Number of Plaintiffs 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 Alleged total of judgment against nursing home operator Alleged total of judgment against nursing home operator Alleged total of judgment against nursing home operator Number of individuals who purchased facilities from the principals subject to SEC New Jersey proceedings Number of individuals who purchased facilities from the principals subject to SEC New Jersey proceedings Number of individuals who purchased facilities from the principals subject to SEC New Jersey proceedings Outstanding principal, accrued interest and other amounts required by bond documents Outstanding principal, accrued interest and other amounts required by bond documents Outstanding principal, accrued interest and other amounts required by bond documents Number of principals in SEC New Jersey proceedings Number of principals in SEC New Jersey proceedings Number of principals in SEC New Jersey proceedings Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Measurement Basis [Axis] Measurement Basis [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member] Reported Value Measurement [Member] Estimate of Fair Value, Fair Value Disclosure [Member] Estimate of Fair Value Measurement [Member] Asset-backed securities Asset-backed Securities [Member] Other trading securities Other Trading Securities [Member] Other debt or equity trading securities Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Cash and due from banks Cash and Cash Equivalents, Fair Value Disclosure 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. Loans, net of allowance 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. Time deposits Other borrowed funds Other Liabilities, Fair Value Disclosure Organization, Consolidation and Presentation of Financial Statements [Abstract] Stockholders' Equity Note [Abstract] Statement [Table] Statement [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Accumulated Net Unrealized Gain (Loss) on Available for Sale Securities [Member] AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member] Accumulated Unrealized Gain (Loss) on Employee Benefit Plans [Member] Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Statement [Line Items] Statement [Line Items] Dividends Payable, Date Declared Dividends Payable, Date Declared Dividends declared (in dollars per share) Common Stock, Dividends, Per Share, Declared Dividends Payable, Date to be Paid Dividends Payable, Date to be Paid Dividends Payable, Date of Record Dividends Payable, Date of Record Schedule of Accumulated Other Income (Loss) [Abstract] Schedule of Accumulated Other Comprehensive Income [Roll Forward] -- None. No documentation exists for this element. -- Balance, Beginning of Period Transition adjustment for new accounting principle in period of adoption Cumulative Effect of New Accounting Principle in Period of Adoption Net change in unrealized gain (loss) Other comprehensive income (loss), before income taxes Other comprehensive income (loss), net of income taxes Balance, End of Period Loans and Allowance for Credit Losses [Abstract] Loans and Allowance for Credit Losses [Abstract] 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. 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. Loans and Allowances for Credit Losses, Minimum No of Days After Which Past Due Non-Risk Graded Loans Are Charged Off 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 Loans and Allowances for Credit Losses, Maximum No of Days After Which Past Due Non-Risk Graded Loans Are Charged Off Max No 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 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 Earnings Per Share [Table Text Block] Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Fees and Commissions Revenue [Text Block] Revenue from Contract with Customer [Text Block] Subsequent Events [Abstract] Subsequent Events [Text Block] Subsequent Events [Text Block] Accounting Policies [Abstract] Basis of Accounting, Policy [Policy Text Block] Basis of Accounting, Policy [Policy Text Block] Principles of Consolidation [Policy Text Block] Consolidation, Policy [Policy Text Block] Reclassification, Policy [Policy Text Block] Reclassification, Policy [Policy Text Block] Newly Adopted and Pending Accounting Policies [Policy Text Block] New Accounting Pronouncements, Policy [Policy Text Block] Derivatives, Policy [Policy Text Block] Derivatives, Policy [Policy Text Block] Loans and Allowances for Credit Losses, Loans [Policy Text Block] Policy Loans Receivable, Policy [Policy Text Block] Loans and Allowances for Credit Losses, Allowances for Credit Losses [Policy Text Block] Loans and Leases Receivable, Allowance for Loan Losses Policy [Policy Text Block] Lessee, Leases [Policy Text Block] Lessee, Leases [Policy Text Block] Revenue [Policy Text Block] Revenue [Policy Text Block] Fair Value Measurements, Measured On Recurring Basis, Significant Unobservable Inputs, Quantitative Information [Abstract] Fair Value Measurements, Measured On Recurring Basis, Significant Unobservable Inputs, Quantitative Information [Abstract] Interest Rate Spread [Member] Interest Rate Spread [Member] Interest Rate Spread [Member] Liquidity discount [Member] Measurement Input, Discount for Lack of Marketability [Member] Quoted prices of loans sold in securitization transactions, with a liquidity discount applied [Member] Quoted prices of loans sold in securitization transactions, with a liquidity discount applied [Member] Quoted prices of loans sold in securitization transactions, with a liquidity discount applied [Member] Available-for-sale securities [Member] Available-for-sale Securities [Member] Residential mortgage loans held for sale [Member] Residential Mortgage Loans Held for Sale [Member] Represents financial statement line item Residential Mortgage Loans Held for Sale Range of Interest Rates used to Value Securities Range of Interest Rates used to Value Securities Range of Interest Rates used to Value Securities Range of fair value as a percentage of par value Range of fair value as a percentage of part value Range of fair value as a percentage of part value 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. Average Yields On Comparable Short-term Taxable Securities Maximum Average Yields On Comparable Short-term Taxable Securities Maximum The average rate of yield for comparable short-term investment grade taxable security. Significant Accounting Policies [Text Block] Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Reportable Segments [Text Block] Segment Reporting Disclosure [Text Block] 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] Fair Value Assets Measured On Recurring Basis, Significant Unobservable Inputs [Table Text Block] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Fair Value Inputs, Fair Value Measured On a Recurring Basis, Quantitative Information [Table Text Block] Fair Value Inputs, Fair Value Measured On a Recurring Basis, Quantitative Information [Table Text Block] Fair Value Inputs, Fair Value Measured On a Recurring Basis, Quantitative Information [Table Text Block] Fair Value Assets Measured on Nonrecurring Basis [Table Text Block] Fair Value Measurements, Nonrecurring [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] Fair Value Inputs, Fair Value Measured On a Nonrecurring Basis, Quantitative Information [Table Text Block] Fair Value of Financial Instruments [Table Text Block] Fair Value, by Balance Sheet Grouping [Table Text Block] Leases of Lessee Disclosure [Text Block] Leases of Lessee Disclosure [Text Block] Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Trading Securities, [Table Text Block] Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block] Investment Securities (Held-to-Maturity) [Table Text Block] Debt Securities, Held-to-maturity [Table Text Block] Available For Sale Securities [Table Text Block] Debt Securities, Available-for-sale [Table Text Block] 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] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Mortgage banking revenue [Member] Mortgage banking revenue [Member] Represents Mortgage banking revenue income statement line item. Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value Assets Measured on Recurring Basis Unobservable Reconciliation [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Balance, beginning of period Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Transfer to Level 3 from Level 2 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Proceeds from sales Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales Redemptions and distributions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Gain (loss) recognized in earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Other comprehensive income (loss) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Balance, end of period Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Total customer risk management programs Customer Risk Management Programs [Member] Represents total derivative contracts in customer risk management programs. To-be-announced residential mortgage-backed securities [Member] TBA Residential Mortgage-Backed Securities [Member] To-be-announed residential mortgage-backed securities [Member] Interest rate swaps [Member] Interest Rate Swap [Member] Energy contracts [Member] Energy Related Derivative [Member] Agricultural contracts [Member] Agricultural Contracts [Member] Trading in a derivative instrument whose primary underlying risk is tied to agricultural commodity prices. Foreign exchange contracts [Member] Foreign Exchange Contract [Member] Equity option contracts [Member] Equity Swap [Member] 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. Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Notional Amount of Derivatives [Abstract] Notional Disclosures [Abstract] Derivative Assets, Notional Derivative Asset, Notional Amount Derivative Liabilities, Notional Derivative Liability, Notional Amount Derivative Assets, Fair Value, Net [Abstract] Derivative Asset, Fair Value, Amount Not Offset Against Collateral [Abstract] Derivative Assets, Gross Fair Value Derivative Asset, Fair Value, Gross Asset 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. 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. Derivative Assets, Cash Collateral Derivative Asset, Collateral, Obligation to Return Cash, Offset Derviative contracts, net of cash collateral, Assets, Fair value Derivative Liabilities, Fair Value, Net [Abstract] Derivative Liability, Fair Value, Amount Not Offset Against Collateral [Abstract] Derivative Liabilities, Gross Fair Value Derivative Liability, Fair Value, Gross Liability 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 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. Derivative Liabilities, Cash Collateral Derivative Liability, Collateral, Right to Reclaim Cash, Offset Derivative Liabilities, Fair Value, Net of Cash Collateral Reportable Segments [Table Text Block] Schedule of Segment Reporting Information, by Segment [Table Text Block] Financing Receivable, Troubled Debt Restructuring [Table] Financing Receivable, Troubled Debt Restructuring [Table] Financial Instrument Performance Status [Axis] Financial Instrument Performance Status [Axis] Financial Instrument Performance Status [Domain] Financial Instrument Performance Status [Domain] Accruing [Member] Performing Financial Instruments [Member] Financing Receivable, Troubled Debt Restructuring [Line Items] Financing Receivable, Troubled Debt Restructuring [Line Items] Troubled Debt Restructuring, Recorded Investment Financing Receivable, Troubled Debt Restructuring Troubled Debt Restructuring, Performing in Accordance With Modified Terms Troubled Debt Financing Receivable Modification Performing According To Modified Terms Represents the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructuring and are performing according to modified terms. Financing Receivable, Troubled Debt Restructuring, Postmodification Financing Receivable, Troubled Debt Restructuring, Postmodification Mortgage Banking Revenue [Abstract] Mortgage Banking Revenue [Abstract] Net realized gains on sale of mortgage loans Gain (Loss) on Sale of Mortgage Loans Net change in unrealized gain on mortgage loans held for sale Net change in unrealized gain on mortgage loans held for sale Represents the net change in unrealized gain on mortgage loans held for sale under fair value option. 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. 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. Total production revenue Mortgage Production Revenue Total gain (loss) on mortgage loans held for sale, including mortgage loan commitments and forward sales contracts. Servicing revenue Mortgage Servicing Fees Servicing fees for loans secured by real property. 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. Shareholders' Equity [Text Block] Stockholders' Equity Note Disclosure [Text Block] Financing Receivable, Credit Quality Indicator [Table] Financing Receivable, Credit Quality Indicator [Table] Performing [Member] Nonaccrual [Member] Nonperforming Financial Instruments [Member] Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] Pass [Member] Pass [Member] Other Loans Especially Mentioned [Member] Special Mention [Member] Substandard [Member] Substandard [Member] Financing Receivable, Credit Quality Indicator [Line Items] Financing Receivable, Credit Quality Indicator [Line Items] Recorded Investment [Abstract] Internally Risk Graded, Recorded Investment Internally Risk Graded, Recorded Investment The amount of the recorded investment, that is internally risk graded on credit quality, in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Non-Graded, Recorded Investment Non-Graded, Recorded Investment The amount of the recorded investment, for which risk grading is not used to monitor credit quality, in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. These represent small homogeneous pools primarily composed of residential and consumers as well as certain commercial loans. Related Allowance [Abstract] Internally Risk Graded, Allowance Internally Risk Graded, Allowance The amount of the allowance for credit losses on recorded investment, that is internally risk graded, in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Non-Graded, Allowance Non-Graded, Allowance The amount of the allowance for credit losses on recorded investment that is not internally risk graded, in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract] Derivative, Gain (Loss) on Derivative, Net [Abstract] Brokergage and Trading Revenue Trading Gain (Loss) Gain (Loss) on Derivatives, Net Derivative, Gain (Loss) on Derivative, Net Loans [Text Block] Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Schedule of Impaired Loans [Table] Schedule of Impaired Financing Receivable [Table] Financing Receivable, Impaired [Line Items] Financing Receivable, Impaired [Line Items] Impaired loans [Abstract] Loan and Lease Receivables, Impaired [Abstract] Impaired loans, unpaid principal balance Impaired Financing Receivable, Unpaid Principal Balance Impaired loans, recorded investment, total Impaired Financing Receivable, Recorded Investment Impaired loans, recorded investment with no related allowance Impaired Financing Receivable, with No Related Allowance, Recorded Investment Impaired loans, recorded investment with related allowance Impaired Financing Receivable, with Related Allowance, Recorded Investment Impaired loans, related allowance Impaired Financing Receivable, Related Allowance Impaired loans, average recorded investment Impaired Financing Receivable, Average Recorded Investment Impaired loans, interest income recognized Impaired Financing Receivable, Interest Income, Accrual Method Impaired loans, unpaid principal balance to affiliates Impaired Affiliated Loans Impaired Affiliated Loans Statement of Stockholders' Equity [Abstract] Common Stock [Member] Common Stock [Member] Capital Surplus [Member] Additional Paid-in Capital [Member] Retained Earnings [Member] Retained Earnings [Member] Treasury Stock [Member] Treasury Stock [Member] Accumulated Other Comprehensive Income (Loss) [Member] AOCI Attributable to Parent [Member] Total Shareholders' Equity [Member] Parent [Member] Non-Controlling Interests [Member] Noncontrolling Interest [Member] Balance, beginning of period (in shares) Shares, Issued Balance, beginning of period Balance, beginning of period, adjusted Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance Net income Other comprehensive income (loss) Repurchase of common stock (in shares) Stock Repurchased During Period, Shares Repurchase of common stock Treasury Stock, Value, Acquired, Par Value Method Stock options exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Stock options exercised Stock Issued, Value, Stock Options Exercised, Net of Tax Benefit (Expense) Non-vested shares awarded, net (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Non-vested shares awarded, net Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net Vesting of non-vested shares (in shares) Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Vesting of non-vested shares Share-based Payment Arrangement, Decrease for Tax Withholding Obligation Share-based compensation APIC, Share-based Payment Arrangement, Increase for Cost Recognition Cash dividends on common stock Dividends, Common Stock, Cash Capital calls and distributions, net Noncontrolling Interest, Decrease from Deconsolidation Balance, end of period (in shares) Balance, end of period Gross charge-offs against allowance for loan losses Allowance for Loan and Lease Losses, Write-offs Net losses and expenses of repossessed assets, net Repossessed Assets Expense And Net Losses Amount of expense and net losses recognized during the period for repossessed assets. Income Statement [Abstract] Interest revenue [Abstract] Interest Income (Expense), Net [Abstract] Loans Interest and Fee Income, Loans and Leases Held-in-portfolio Residential mortgage loans held for sale Interest and Fee Income, Loans Held-for-sale, Mortgages Trading securities Interest and Dividend Income, Securities, Operating, Trading or Measured at Fair Value Investment securities Interest Income, Debt Securities, Held-to-maturity Available for sale securities Interest and Dividend Income, Securities, Operating, Available-for-sale 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