Supplemental Cash Flow Elements [Abstract] Supplemental Disclosure for Statement of Cash Flows Cash Flow, Supplemental Disclosures [Text Block] Investments, Debt and Equity Securities [Abstract] Gross gains Debt Securities, Available-for-sale, Realized Gain Gross losses Debt Securities, Available-for-sale, Realized Loss Net realized gains Debt Securities, Available-for-sale, Realized Gain (Loss) Fair Value Disclosures [Abstract] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Measurement Frequency [Axis] Measurement Frequency [Axis] Measurement Frequency [Domain] Measurement Frequency [Domain] Fair Value, measurements, recurring Fair Value, Recurring [Member] Asset Class [Axis] Asset Class [Axis] Asset Class [Domain] Asset Class [Domain] Interest rate contracts Interest Rate Contract [Member] Other assets - MSRs Other Assets, Mortgage Servicing Rights [Member] Other Assets, Mortgage Servicing Rights [Member] Other assets - SBIC investments Other Assets, SBIC Investments [Member] Other Assets, SBIC Investments [Member] 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 Input Reconciliation, Calculation [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Balance, beginning of year Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Total gains or losses (realized/unrealized): Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net [Abstract] Included in earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Purchases, issuances, sales and settlements: Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements) [Abstract] Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Issuances Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Issuances Balance, end of year Change in unrealized gains (losses) included in earnings for the period, attributable to assets and liabilities still held Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) Receivables [Abstract] Schedule of composition of loan portfolio Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Disclosure of activity in allowance for loan losses during year Financing Receivable, Allowance for Credit Loss [Table Text Block] Schedule of nonaccrual financing receivables Financing Receivable, Nonaccrual [Table Text Block] Schedule of impaired financing receivables Impaired Financing Receivables [Table Text Block] Schedule of credit quality indicators associated with the Company's loans Financing Receivable Credit Quality Indicators [Table Text Block] Schedule of past due loans Financing Receivable, Past Due [Table Text Block] Schedule of troubled debt restructuring loans and subsequent defaults on restructured loans Financing Receivable, Troubled Debt Restructuring [Table Text Block] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] U.S. Treasury and other U.S. government agencies US Treasury and Government [Member] Agency mortgage-backed securities Mortgage Backed Securities, Other [Member] Agency collateralized mortgage obligations Collateralized Mortgage Backed Securities [Member] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-sale [Line Items] Debt securities available for sale: Available-for-sale Securities, Debt Maturities [Abstract] Available-for-sale securities, securities in a loss position for less than 12 months, fair value Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months Available-for-sale securities, securities in a loss position for less than 12 months, unrealized losses Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Available-for-sale securities, securities in a loss position for 12 months or longer, fair value Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer Available-for-sale securities, securities in a loss position for 12 months or longer, unrealized losses Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Available-for-sale securities, fair value Debt Securities, Available-for-sale, Unrealized Loss Position Available-for-sale securities, unrealized losses Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss Commitments and Contingencies Disclosure [Abstract] Loss Contingencies [Table] Loss Contingencies [Table] Litigation Status [Axis] Litigation Status [Axis] Litigation Status [Domain] Litigation Status [Domain] Pending Litigation Pending Litigation [Member] Settled Litigation Settled Litigation [Member] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Accrued Expenses and Other Liabilities Accrued Expenses and Other Liabilities [Member] Accrued Expenses and Other Liabilities [Member] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Potential Recourse Related to FNMA Securitizations Potential Recourse Related To FNMA Securitizations [Member] Potential Recourse Related To FNMA Securitizations [Member] Standard Representations and Warranties Related to Loan Sales to Government-Sponsored Agencies Standard Representations And Warranties Related To Loan Sales To Government-Sponsored Agencies [Member] Standard Representations And Warranties Related To Loan Sales To Government-Sponsored Agencies [Member] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Domain] Guarantor Obligations, Nature [Domain] Financial Standby Letter of Credit Financial Standby Letter of Credit [Member] Statistical Measurement [Axis] Statistical Measurement [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Litigation Case [Axis] Litigation Case [Axis] Litigation Case [Domain] Litigation Case [Domain] David S. Bagwell Trust, et al. v. BBVA USA, et al. David S. Bagwell Trust, et al. v. BBVA USA, et al. [Member] David S. Bagwell Trust, et al. v. BBVA USA, et al. [Member] Zamora-Orduna Realty Group LLC v. BBVA USA Zamora-Orduna Realty Group LLC v. BBVA USA [Member] Zamora-Orduna Realty Group LLC v. BBVA USA [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Standby and commercial letters of credit expiration term Guarantor Obligations, Expiration Term Guarantor Obligations, Expiration Term Letters of credit, deferred fees Contract with Customer, Liability Maximum potential amount of future undiscounted payments Company could be required to make on outstanding standby letters of credit Guarantor Obligations, Maximum Exposure, Undiscounted Loss contingency accrual Loss Contingency Accrual Loss contingency, estimate of possible loss Loss Contingency, Estimate of Possible Loss Damages sought, value Loss Contingency, Damages Sought, Value Amount awarded to other party Litigation Settlement, Amount Awarded to Other Party Damages awarded, value Loss Contingency, Damages Awarded, Value Accounting Policies [Abstract] New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Cumulative Effect, Period of Adoption [Axis] Cumulative Effect, Period of Adoption [Axis] Cumulative Effect, Period of Adoption [Axis] Cumulative Effect, Period of Adoption [Domain] Cumulative Effect, Period of Adoption [Domain] Cumulative Effect, Period of Adoption [Domain] As Reported Under ASC 326 Cumulative Effect, Period Of Adoption, Adjusted Balance [Member] Cumulative Effect, Period Of Adoption, Adjusted Balance [Member] Impact of ASC 326 Adoption Cumulative Effect, Period of Adoption, Adjustment [Member] Cumulative Effect, Period of Adoption, Adjustment [Member] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Accumulated deficit increase, net Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Allowance for credit losses on debt securities held to maturity Debt Securities, Held-to-maturity, Allowance for Credit Loss Allowance for credit losses on loans Financing Receivable, Allowance for Credit Loss Allowance for credit losses on letters of credit and unfunded commitments Off-Balance Sheet, Credit Loss, Liability Transfers and Servicing [Abstract] Securities purchased under agreements to resell Securities Purchased under Agreements to Resell, Gross Including Not Subject to Master Netting Arrangement [Abstract] Securities purchased under agreements to resell, subject to master netting arrangement, gross amounts recognized Securities Purchased under Agreements to Resell, Gross Securities purchased under agreements to resell, subject to a master netting arrangement, gross amounts offset in the condensed consolidated balance sheets Securities Purchased under Agreements to Resell, Liability Securities purchased under agreements to resell, subject to a master netting arrangement, net amount presented in the condensed consolidated balance sheets Securities Purchased under Agreements to Resell Securities purchased under agreements to resell, subject to a master netting arrangement, financial instruments collateral received/ pledged Securities Purchased under Agreements to Resell, Collateral, Obligation to Return Securities Securities purchased under agreements to resell, net amount Securities Purchased under Agreements to Resell, Amount Offset Against Collateral Securities sold under agreements to repurchase Securities Sold under Agreements to Repurchase, Amount Offset Against Collateral [Abstract] Securities sold under agreements to repurchase, subject to a master netting arrangement, gross amounts recognized Securities Sold under Agreements to Repurchase, Gross Securities sold under agreements to repurchase, gross amounts offset in the condensed consolidated balance sheets Securities Sold under Agreements to Repurchase, Asset Securities sold under agreements to repurchase, subject to a master netting arrangement, net amount presented in the condensed consolidated balance sheet Securities Sold under Agreements to Repurchase Securities sold under agreements to repurchase, subject to a master netting arrangement, financial instruments collateral received/ pledged Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities Securities sold under agreements to repurchase, subject to a master netting arrangement, net amount Securities Sold under Agreements to Repurchase, Amount Offset Against Collateral Fair value of collateral received related to securities purchased under agreements to resell Securities Purchased under Agreements to Resell, Fair Value of Collateral Fair value of collateral pledged related to securities sold under agreements to repurchase Securities Sold under Agreements to Repurchase, Fair Value of Collateral Financing Receivable, Nonaccrual [Table] Financing Receivable, Nonaccrual [Table] Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] Class of Financing Receivable [Domain] Class of Financing Receivable [Domain] Real estate – construction Construction Loans [Member] Commercial real estate – mortgage Commercial Real Estate [Member] Residential real estate – mortgage Residential Real Estate [Member] Equity lines of credit Home Equity Line of Credit [Member] Equity loans Home Equity Loan [Member] Credit card Credit Card Receivable [Member] Consumer direct Consumer Direct Loans [Member] Consumer Direct Loans [Member] Consumer indirect Consumer Indirect Loans [Member] Consumer Indirect Loans [Member] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Commercial, Financial and Agricultural Commercial Portfolio Segment [Member] Commercial Real Estate Commercial Real Estate Portfolio Segment [Member] Residential Real Estate Residential Portfolio Segment [Member] Consumer Consumer Portfolio Segment [Member] Financing Receivable, Nonaccrual [Line Items] Financing Receivable, Nonaccrual [Line Items] Nonaccrual Financing Receivable, Nonaccrual Nonaccrual With No Recorded Allowance Financing Receivable, Nonaccrual, No Allowance Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Liability Class [Axis] Liability Class [Axis] Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Long-term debt Long-term Debt [Member] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Derivatives designated as hedging instrument Designated as Hedging Instrument [Member] Hedging Relationship [Axis] Hedging Relationship [Axis] Hedging Relationship [Domain] Hedging Relationship [Domain] Fair value hedges Fair Value Hedging [Member] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Interest rate swap Interest Rate Swap [Member] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Gain (loss) related to hedge, firm commitments no longer qualifying as a fair value hedge Gain (Loss) from Hedged Firm Commitment Not Qualifying as Fair Value Hedge, Net Fair value hedges, weighted average expected remaining term Derivative, Average Remaining Maturity Carrying amount of hedging liabilities Hedged Liability, Fair Value Hedge Cumulative amount of fair value hedging adjustment included in the carrying amount of hedged liabilities - Hedged items currently designated Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease) Cumulative amount of fair value hedging adjustment included in the carrying amount of hedged liabilities - Hedged items no longer designated Hedged Liability, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) Schedule of loans transferred to held for sale and loans sold Schedule of Loans Transferred To Held for Sale And Loans Sold [Table Text Block] Schedule of Loans Transferred To Held for Sale And Loans Sold [Table Text Block] Schedule of loan sales and residential mortgage servicing rights Schedule of Servicing Assets at Fair Value [Table Text Block] Schedule of sensitivity of current fair value of residential real estate mortgage servicing rights Schedule of Assumptions for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Table Text Block] 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] 30-59 Days Past Due Financial Asset, 30 to 59 Days Past Due [Member] 60-89 Days Past Due Financial Asset, 60 to 89 Days Past Due [Member] 90 Days or More Past Due Financial Asset, Equal to or Greater than 90 Days Past Due [Member] Financing Receivable, Past Due [Line Items] Financing Receivable, Past Due [Line Items] Financing Receivable, Past Due Financing Receivable, Past Due Accruing TDRs Financing Receivable, Modifications, Recorded Investment, Accruing Financing Receivable, Modifications, Recorded Investment, Accruing Total Past Due, Nonaccrual or TDR Financing Receivable, Recorded Investment, Past Due, Nonaccrual or TDR Financing Receivable, Recorded Investment, Past Due, Nonaccrual or TDR Not Past Due, Nonaccrual or TDR Financing Receivable, Recorded Investment, Not Past Due, Nonaccrual or TDR Financing Receivable, Recorded Investment, Not Past Due, Nonaccrual or TDR Total Loans and Leases Receivable, Net of Deferred Income Fair Value Option, Disclosures [Table] Fair Value Option, Disclosures [Table] Residential mortgage loans held for sale Loans Held for Sale, Mortgages [Member] Loans Held for Sale, Mortgages [Member] Fair Value, Option, Quantitative Disclosures [Line Items] Fair Value, Option, Quantitative Disclosures [Line Items] Aggregate Fair Value Mortgages Held-for-sale, Fair Value Disclosure Aggregate Unpaid Principal Balance Principal Amount Outstanding on Loans Held-for-sale or Securitization or Asset-backed Financing Arrangement Difference Fair Value, Option, Aggregate Differences, Loans and Long-term Receivables Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Residential Real Estate Mortgage Loans Sold with Retained Servicing Residential Real Estate Mortgage Loans Sold with Retained Servicing [Member] Residential Real Estate Mortgage Loans Sold with Retained Servicing [Member] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Recorded balance of residential real estate mortgage loans sold with retained servicing Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement MSRs Servicing Asset at Fair Value, Amount Originated For Sale In The Secondary Market Secondary Residential Market [Member] Secondary Residential Market [Member] Residential real estate loans originated for sale in the secondary market sold SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Cost of Mortgage Sold Net gains recognized on sales of residential real estate loans originated for sale in the secondary market Gain (Loss) on Sale of Mortgage Loans Servicing fees recognized Contractually Specified Servicing Fees, Amount Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Noninterest income Noninterest Income [Member] Noninterest Income [Member] Forward contracts Forward Contracts [Member] Net gains (losses) realized due to changes in fair value of loans Fair Value, Option, Changes in Fair Value, Gain (Loss) Loan Sales and Servicing Transfers and Servicing of Financial Assets [Text Block] Income Statement [Abstract] Statement [Table] Statement [Table] Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Service charges on deposit accounts Deposit Account [Member] Card and merchant processing fees Credit Card [Member] Investment services sales fees Retail [Member] Money transfer income Transfer Agent [Member] Investment banking and advisory fees Investment Banking And Advisory Fees [Member] Investment banking and advisory fees [Member] Asset management fees Asset Management [Member] Statement [Line Items] Statement [Line Items] Interest income: Interest Income [Abstract] Interest Income [Abstract] Interest and fees on loans Interest and Fee Income, Loans and Leases Interest on debt securities available for sale Interest Income, Debt Securities, Available-for-sale, Operating Interest on debt securities held to maturity Interest Income, Debt Securities, Held-to-maturity Interest on trading account assets Interest Income, Debt Securities, Trading, Operating Interest and dividends on other earning assets Other Interest and Dividend Income Total interest income Interest and Dividend Income, Operating Interest expense: Interest Expense [Abstract] Interest on deposits Interest Expense, Deposits Interest on FHLB and other borrowings Interest Expense, Long-term Debt Interest on federal funds purchased and securities sold under agreements to repurchase Interest Expense, Federal Funds Purchased and Securities Sold under Agreements to Repurchase Interest on other short-term borrowings Interest Expense, Other Short-term Borrowings Total interest expense Interest Expense Net interest income Interest Income (Expense), Net Total provision for credit losses Provision for Loan and Lease Losses Net interest income after provision for credit losses Interest Income (Expense), after Provision for Loan Loss Noninterest income: Noninterest Income [Abstract] Noninterest income Revenue from Contract with Customer, Excluding Assessed Tax Mortgage banking Fees and Commissions, Mortgage Banking Income Fees and Commissions, Mortgage Banking Income Corporate and correspondent investment sales Fees and Commissions, Corporate and Correspondent Investment Sales Fees and Commissions, Corporate and Correspondent Investment Sales Bank owned life insurance Life Insurance, Corporate or Bank Owned, Change in Value Investment securities gains, net Debt Securities, Gain (Loss) Other Noninterest Income, Other Total noninterest income Noninterest Income Noninterest expense: Noninterest Expense [Abstract] Salaries, benefits and commissions Labor and Related Expense Professional services Professional Fees Equipment Equipment Expense Net occupancy Occupancy, Net Money transfer expense Money Transfers Expense Money Transfers Expense Goodwill impairment Goodwill, Impairment Loss Other Other Noninterest Expense Total noninterest expense Noninterest Expense Net (loss) income before income tax expense Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income tax (benefit) expense Income Tax Expense (Benefit) Net (loss) income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Less: net income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Net (loss) income attributable to BBVA USA Bancshares, Inc. Net Income (Loss) Attributable to Parent Less: preferred stock dividends Preferred Stock Dividends, Income Statement Impact Net (loss) income attributable to common shareholder Net Income (Loss) Available to Common Stockholders, Basic Equity [Abstract] Comprehensive Income Comprehensive Income (Loss) Note [Text Block] Interest and Fees on Loans Interest and Fees on Loans [Member] Interest and Fees on Loans [Member] Interest on FHLB and other borrowings Interest On FHLB And Other Borrowings [Member] Interest on FHLB and Other Borrowings [Member] Cash flow hedges Cash Flow Hedging [Member] Gain (loss) on discontinuation of interest rate cash flow hedge due to forecasted transaction probable of not occurring, net Gain (Loss) on Discontinuation of Interest Rate Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring, Net Cash flow hedges not terminated, net fair value Cash Flow Hedges Derivative Instruments at Fair Value, Net Cash flow hedges, weighted average expected remaining term Cash flow hedge gain (loss) to be reclassified within twelve months Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months Maximum length of time hedged in interest rate cash flow hedge Maximum Length of Time Hedged in Interest Rate Cash Flow Hedge Total amounts presented in the unaudited condensed consolidated statements of income Total amounts presented in the unaudited condensed consolidated statements of income Gains (losses) on fair value hedging relationships: Effect of Fair Value Hedges on Results of Operations [Abstract] Amounts related to interest settlements and amortization on derivatives Derivative, Fair Value Hedge, Gain (Loss) on Interest Settlements and Amortization Derivative, Fair Value Hedge, Gain (Loss) on Interest Settlements and Amortization Recognized on derivatives Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments Recognized on hedged items Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge Net income (expense) recognized on fair value hedges Gain (Loss) on Fair Value Hedges Recognized in Earnings Gain (losses) on cash flow hedging relationships: Effect of Cash Flow Hedges on Results of Operations [Abstract] Realized losses reclassified from AOCI into net income Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax Net income (expense) recognized on cash flow hedges Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax Related Party Transactions [Abstract] Schedule of derivative contracts between the Company and BBVA Schedule of Related Party Transactions [Table Text Block] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Fair Value, measurements, nonrecurring Fair Value, Nonrecurring [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] Quoted Prices in Active Markets for Identical Assets, Level 1 Fair Value, Inputs, Level 1 [Member] Significant Other Observable Inputs, Level 2 Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 3 Fair Value, Inputs, Level 3 [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] OREO, fair value Other Real Estate, Fair Value Disclosure Other Real Estate, Fair Value Disclosure OREO, total gains (losses) Impairment of Real Estate Schedule of Credit Derivatives [Table] Schedule of Credit Derivatives [Table] Free-standing derivatives not designated as hedging instrument Not Designated as Hedging Instrument [Member] Other assets Other Assets [Member] Deposits Deposits [Member] Trading Activity [Axis] Trading Activity [Axis] Trading Activity, by Type [Domain] Trading Activity, by Type [Domain] Over the counter Over the Counter [Member] Derivatives [Line Items] Credit Derivatives [Line Items] Derivative assets Derivative Asset, Fair Value, Gross Asset Gain (loss) on derivative instruments held for trading purposes, net Gain (Loss) on Derivative Instruments Held for Trading Purposes, Net Credit risk derivatives, at fair value, net Derivatives, Credit Risk Amount Derivatives, Credit Risk Amount Gain (loss) on derivative instruments held for non-trading purposes, net Gain (Loss) On Derivative Instruments Held For Non-Trading Purposes, Net Gain (Loss) On Derivative Instruments Held For Non-Trading Purposes, Net Derivative, collateral, right to reclaim cash Derivative, Collateral, Right to Reclaim Cash Derivative, collateral, obligation to return Derivative, Collateral, Obligation to Return Cash Goodwill and Intangible Assets Disclosure [Abstract] Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Reporting Unit [Axis] Reporting Unit [Axis] Reporting Unit [Domain] Reporting Unit [Domain] Commercial Banking and Wealth Commercial Banking and Wealth [Member] Commercial Banking and Wealth [Member] Retail Banking Retail Banking [Member] Retail Banking [Member] Corporate and Investment Banking Coporate and Investment Banking [Member] Coporate and Investment Banking [Member] Acquired Finite-Lived Intangible Assets [Line Items] Acquired Finite-Lived Intangible Assets [Line Items] Goodwill Goodwill Summary of asset and liabilities measure at fair value on a recurring basis Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Reconciliation of assets measured on a recurring basis using significant unobservable inputs Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Schedule of carrying amounts and estimated fair values within the fair value hierarchy Fair Value Measurements, Nonrecurring [Table Text Block] Schedule of fair value measurement inputs Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Schedule of fair value by balance sheet location Fair Value, by Balance Sheet Grouping [Table Text Block] Schedule of differences between aggregate fair value and aggregate unpaid principle balance Fair Value Option, Disclosures [Table Text Block] Derivative, net liability position, aggregate fair value Derivative, Net Liability Position, Aggregate Fair Value Collateral already posted, aggregate fair value Collateral Already Posted, Aggregate Fair Value Additional collateral, aggregate fair value Additional Collateral, Aggregate Fair Value Debt Securities, Held-to-maturity, Credit Quality Indicator [Table] Debt Securities, Held-to-maturity, Credit Quality Indicator [Table] U.S. Treasury and other U.S. government agencies Agency Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] Non-agency Mortgage-backed Securities, Issued by Private Enterprises [Member] Asset-backed securities and other Asset-backed Securities [Member] State and political subdivisions US States and Political Subdivisions Debt Securities [Member] Credit Rating, Internal [Axis] Credit Rating, Internal [Axis] Credit Rating, Internal [Axis] Credit Rating, Internal [Domain] Credit Rating, Internal [Domain] [Domain] for Credit Rating, Internal [Axis] AAA Internal, AAA Rating [Member] Internal, AAA Rating [Member] AA / A - Internal, AAplus / A Rating [Member] Internal, AAplus / A Rating [Member] BBB / B- Internal, BBBplus / Bminus Rating [Member] Internal, BBBplus / Bminus Rating [Member] CCC / C Internal, CCCplus / C Rating [Member] Internal, CCCplus / C Rating [Member] D Internal, D Rating [Member] Internal, D Rating [Member] NR Internal, NR Rating [Member] Internal, NR Rating [Member] Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items] Debt Securities, Held-to-maturity, Credit Quality Indicator [Line Items] Held-to-maturity securities, amortized cost Debt Securities, Held-to-maturity Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Loans and Loans Held for Sale Excluding Loans Originated for Sale in Secondary Market Loans and Loans Held for Sale Excluding Loans Originated for Sale in Secondary Market [Member] Loans and Loans Held for Sale Excluding Loans Originated for Sale in Secondary Market [Member] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] BSI BSI Subsidiary [Member] BSI Subsidiary [Member] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Preferred Stock Preferred Stock [Member] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Series A Preferred Stock Series A Preferred Stock [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Uncommitted Demand Facility Uncommitted Demand Facility [Member] Uncommitted Demand Facility [Member] Revolving Note and Cash Subordinated Agreement Revolving Note And Cash Subordinated Agreement [Member] Revolving Note And Cash Subordinated Agreement [Member] Free-standing derivative instruments – risk management and other purposes Risk Management and Other Purposes Derivative [Member] Risk Management and Other Purposes Derivative [Member] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] BBVA Affiliated Entity [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving Credit Facility Revolving Credit Facility [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Line of Credit Line of Credit [Member] Counterparty Name [Axis] Counterparty Name [Axis] Counterparty Name [Domain] Counterparty Name [Domain] BBVA Compass Bancshares, Inc. BBVA Compass Bancshares, Inc. [Member] BBVA Compass Bancshares, Inc. [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Derivative, notional amount Derivative, Notional Amount Related party transaction, amount of transaction Derivative, Fair Value, Net Securities purchased under agreements to resell Securities sold under agreements to repurchase Due from related parties Due from Related Parties Interest expense Interest Expense, Related Party Revenue from related parties Revenue from Related Parties Fees on agreements Related Party Transaction, Expenses from Transactions with Related Party Preferred stock Preferred Stock, Value, Issued Preferred stock dividends Dividends, Preferred Stock Transfer of loans to loans held for sale Transfer of Portfolio Loans and Leases to Held-for-sale Gain on sale of loans Gain (Loss) on Sale of Loans and Leases Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Interest rate swaps related to long-term debt Interest Rate Swap Long Term Debt [Member] Interest Rate Swap Long Term Debt [Member] Swaps related to commercial loans Interest Rate Swap Commercial Loan [Member] Interest Rate Swap Commercial Loan [Member] Swaps related to FHLB advances Interest Rate Swap FHLB Advances [Member] Interest Rate Swap FHLB Advances [Member] Foreign exchange contracts Foreign Exchange Contract [Member] Forward contracts related to held for sale mortgages Interest Rate Forward Contracts, Held For Sale Mortgages [Member] Interest Rate Forward Contracts, Held For Sale Mortgages [Member] Option contracts related to mortgage servicing rights Option Contract Related To Mortgage Servicing Rights [Member] Option Contract Related To Mortgage Servicing Rights [Member] Interest rate lock commitments Interest Rate Lock Commitments [Member] Purchased equity option related to equity-linked CDs Purchased Equity Option Contracts, Equity Linked CDs [Member] Purchased Equity Option Contracts, Equity Linked CDs [Member] Written equity option related to equity-linked CDs Written Equity Options Linked to CDs [Member] Written Equity Options Linked to CDs [Member] Forwards and swaps related to commercial loans Forward Exchange Contracts, Commercial Loans [Member] Forward Exchange Contracts, Commercial Loans [Member] Spots related to commercial loans Foreign Exchange Spot Contracts, Commercial Loans [Member] Foreign Exchange Spot Contracts, Commercial Loans [Member] Swap associated with sale of Visa, Inc. Class B shares Equity Swap Contracts, Sale of Visa Class B Shares [Member] Equity Swap Contracts, Sale of Visa Class B Shares [Member] Futures contracts Futures Contracts [Member] Futures Contracts [Member] Total trading account assets and liabilities Trading Account Assets and Liabilities [Member] Trading Account Assets and Liabilities [Member] Interest rate contracts for customers Interest Rate Contracts For Customers, Trading Account Assets and Liabilities [Member] Interest Rate Contracts For Customers, Trading Account Assets and Liabilities [Member] Foreign exchange contracts for customers Foreign Exchange Contracts, Trading Account Assets and Liabilities [Member] Foreign Exchange Contracts, Trading Account Assets and Liabilities [Member] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Derivative liabilities Derivative Liability, Fair Value, Gross Liability Related Party Transactions Related Party Transactions Disclosure [Text Block] Supplemental disclosures of cash flow information: Supplemental Cash Flow Information [Abstract] Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activities Net income taxes paid Income Taxes Paid, Net Operating cash flows from operating leases Operating Lease, Payments Operating cash flows from finance leases Finance Lease, Interest Payment on Liability Financing cash flows from finance leases Finance Lease, Principal Payments Supplemental schedule of noncash activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Transfer of loans and loans held for sale to OREO Transfer of Loans Held-for-sale to Portfolio Loans Right-of-use assets obtained in exchange for lease obligations- operating leases Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Restricted cash in other assets Restricted Cash Total cash, cash equivalents and restricted cash shown in the statement of cash flows Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Basis of Presentation Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Investment Type [Axis] Investment Type [Axis] Investments [Domain] Investments [Domain] Loan Restructuring Modification [Axis] Loan Restructuring Modification [Axis] Loan Restructuring Modification [Domain] Loan Restructuring Modification [Domain] Interest Rate Concession Contractual Interest Rate Reduction [Member] Modification of Loan Structure Modification of Loan Structure [Member] Modification of Loan Structure [Member] Accounts, Notes, Loans and Financing Receivable Including Other Real Estated Owned [Line Items] Commercial, industrial, commercial real estate or construction loans, held for investment, period of time after payment becomes delinquent that the Company stops accruing interest income and applies subsequent interest payments as principal reductions Loans Held For Investment, Period of Time After Payment Becomes in Doubt That Incurring Interest Stops and Subsequent Interest Payments are Applied Loans Held For Investment, Period of Time After Payment Becomes in Doubt That Incurring Interest Stops and Subsequent Interest Payments are Applied Consumer loans including residential real estate, held for investment, period of time after payment becomes delinquent or when foreclosure proceedings have been initiated that the Company stops accruing interest income Loans Held For Investment, Period of Time After Payment Becomes Delinquent or Before Foreclosure Proceedings Begin That Accrual of Interest Income is Suspended Loans Held For Investment, Period of Time After Payment Becomes Delinquent or Before Foreclosure Proceedings Begin That Accrual of Interest Income is Suspended Recognition of charge off expenses on consumer loans, period of time loan is past due Recognition of Charge Off Expenses on Consumer Loans, Period of Time Loan is Past Due Recognition of Charge Off Expenses on Consumer Loans, Period of Time Loan is Past Due Recognition of charge off expenses on residential loans, period of time loan is past due Recognition of Charge Off Expenses on Residential Loans, Period of Time Loan is Past Due Recognition of Charge Off Expenses on Residential Loans, Period of Time Loan is Past Due Recognition of charge off expenses on credit card loans, period of time loan is past due Recognition of Charge Off Expenses on Credit Card Loans, Period of Time Loan is Past Due Recognition of Charge Off Expenses on Credit Card Loans, Period of Time Loan is Past Due Accrued interest receivable Interest Receivable TDRs Financing Receivable, Troubled Debt Restructuring, Postmodification Impact to the allowance for loan losses related to modifications classified as TDRs Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down Commitments to lend additional funds to borrowers whose terms have been modified in a TDR Financing Receivable, Troubled Debt Restructuring, Commitment to Lend Other real estate owned Real Estate Acquired Through Foreclosure Loans secured by residential real estate properties for which formal foreclosure proceedings were in process Mortgage Loans in Process of Foreclosure, Amount Loans held for sale Loans Receivable Held-for-sale, Net, Not Part of Disposal Group Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income (Loss) Reclassification out of Accumulated Other Comprehensive Income [Member] Unrealized Gains (Losses) on Debt Securities Available for Sale and Transferred to Held to Maturity AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member] Accumulated Gains (Losses) on Cash Flow Hedging Instruments Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Defined Benefit Plan Adjustment Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Unamortized Impairment Losses on Debt Securities Held to Maturity Accumulated Other-than-Temporary Impairment Attributable to Parent [Member] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Interest on FHLB and other borrowings Net periodic expense Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Income tax (expense) benefit Commitments, Contingencies and Guarantees Commitments and Contingencies Disclosure [Text Block] Goodwill Goodwill and Intangible Assets Disclosure [Text Block] Statement of Financial Position [Abstract] Debt securities held to maturity, estimated fair value Debt Securities, Held-to-maturity, Fair Value Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, liquidation preference (in dollars per share) Preferred Stock, Liquidation Preference Per Share Preferred stock, number of shares authorized Preferred Stock, Shares Authorized Preferred stock, number of shares issued Preferred Stock, Shares Issued Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, number of shares authorized Common Stock, Shares Authorized Common stock, number of shares issued Common Stock, Shares, Issued Loans and Leases Receivable Disclosure [Table] Loans and Leases Receivable Disclosure [Table] Type of Borrower [Axis] Type of Borrower [Axis] Class of Financing Receivable, Type of Borrower [Domain] Class of Financing Receivable, Type of Borrower [Domain] Commercial Commercial Borrower [Member] Consumer Consumer Borrower [Member] Loans and Leases Receivable Disclosure [Line Items] Loans and Leases Receivable Disclosure [Line Items] Loans Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Other assets, MSR investments Other Assets, MSR [Member] Other Assets, MSR [Member] Mortgage-backed securities Mortgage Securities [Member] Mortgage Securities [Member] Collateralized mortgage obligations Equity securities Equity Securities [Member] Equity contracts Equity Contract [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Assets: Assets [Abstract] Trading account assets Debt Securities, Trading Investment securities available for sale Debt Securities, Available-for-sale Loans held for sale Loans Held-for-sale, Fair Value Disclosure Derivative asset Derivative Asset Other assets Other Assets, Fair Value Disclosure Liabilities: Liabilities [Abstract] Trading account liabilities Trading Liabilities, Fair Value Disclosure Derivative liabilities Derivative Liability 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 losses Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax Debt securities available for sale Debt securities held to maturity: Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract] Held-to-maturity securities, amortized cost Held-to-maturity securities, gross unrealized gain Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain Held-to-maturity securities, gross unrealized losses Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss Schedule of notional amount and fair value of derivative instruments Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Schedule of hedging derivative instruments Derivative Instruments, Gain (Loss) [Table Text Block] Schedule of fair value hedging instruments Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block] Schedule of other derivatives not designated as hedging instruments Derivatives Not Designated as Hedging Instruments [Table Text Block] Schedule of assets subject to enforceable master netting arrangements Offsetting Assets [Table Text Block] Schedule of liabilities subject to enforceable master netting arrangements Offsetting Liabilities [Table Text Block] Use of Estimates in the Preparation of Consolidated Financial Statements Use of Estimates, Policy [Policy Text Block] Recently Issued Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Debt Securities Debt Securities, Held-to-maturity, Allowance for Credit Loss [Policy Text Block] Debt Securities, Held-to-maturity, Allowance for Credit Loss [Policy Text Block] Loans Financing Receivable, Held-for-investment [Policy Text Block] Troubled Debt Restructuring Troubled Debt Restructuring [Policy Text Block] Allowance for Loan Losses Loans and Leases Receivable, Allowance for Loan Losses Policy [Policy Text Block] Derivatives and Hedging Derivatives, Policy [Policy Text Block] Securities purchased under agreements to resell and securities sold under agreements to repurchase Repurchase and Resale Agreements Policy [Policy Text Block] Schedule of Servicing Assets at Fair Value [Table] Schedule of Servicing Assets at Fair Value [Table] Fixed rate mortgage loans Fixed Rate Residential Mortgage [Member] Adjustable rate mortgage loans Adjustable Rate Residential Mortgage [Member] Servicing Assets at Fair Value [Line Items] Servicing Assets at Fair Value [Line Items] Fair value of MSRs Composition of residential loans serviced for others, percentage Servicing Asset at Fair Value, Composition by Type, Percentage Servicing Asset at Fair Value, Composition by Type, Percentage Weighted average life (in years) Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Weighted Average Life Prepayment speed: Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Prepayment Speed Effect on fair value of a 10% increase Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 10 Percent Adverse Change in Prepayment Speed Effect on fair value of a 20% increase Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 20 Percent Adverse Change in Prepayment Speed Weighted average option adjusted spread: Assumptions For Fair Value of Assets Or Liabilities That Relate To Transferor's Continuing Involvement, Option Adjusted Spread Assumptions For Fair Value of Assets Or Liabilities That Relate To Transferor's Continuing Involvement, Option Adjusted Spread Effect on fair value of a 10% increase Sensitivity Analysis Of Fair Value, Transferor's Interests In Transferred Financial Assets, Impact Of 10 Percent Adverse Change In Option Adjusted Spread Sensitivity Analysis Of Fair Value, Transferor's Interests In Transferred Financial Assets, Impact Of 10 Percent Adverse Change In Option Adjusted Spread Effect on fair value of a 20% increase Sensitivity Analysis Of Fair Value, Transferor's Interests In Transferred Financial Assets, Impact Of 20 Percent Adverse Change In Option Adjusted Spread Sensitivity Analysis Of Fair Value, Transferor's Interests In Transferred Financial Assets, Impact Of 20 Percent Adverse Change In Option Adjusted Spread Schedule of Impaired Financing Receivable [Table] Schedule of Impaired Financing Receivable [Table] Financing Receivable, Impaired [Line Items] Financing Receivable, Impaired [Line Items] Individually evaluated impaired loans with no recorded allowance, recorded investment Impaired Financing Receivable, with No Related Allowance, Recorded Investment Individually evaluated impaired loans with no recorded allowance, unpaid principal balance Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance Individually evaluated impaired loans with a recorded allowance, recorded investment Impaired Financing Receivable, with Related Allowance, Recorded Investment Individually evaluated impaired loans with a recorded allowance, unpaid principal balance Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance Individually evaluated impaired loans with a recorded allowance, allowance Impaired Financing Receivable, Related Allowance Individually evaluated impaired loans, average recorded investment Impaired Financing Receivable, Average Recorded Investment Individually evaluated impaired loans, interest income recognized Impaired Financing Receivable, Interest Income, Accrual Method Schedule of assets and liabilities subject to enforceable master netting arrangements Schedule of Securities Financing Transactions [Table Text Block] Schedule of securities sold under agreements to repurchase Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Table Text Block] Loans transferred from held for investment to held for sale Charge-offs on loans recognized at transfer from held for investment to held for sale Charge-off On Loans Recognized At Transfer From Held For Investment To Held For Sale Charge-off On Loans Recognized At Transfer From Held For Investment To Held For Sale Loans and loans held for sale sold Loans and Loans Held for Sale, Cost of Loans Sold Loans and Loans Held for Sale, Cost of Loans Sold Segment Reporting [Abstract] Segment Information Segment Reporting Disclosure [Text Block] Financing Receivable, Credit Quality Indicator [Table] Financing Receivable, Credit Quality Indicator [Table] Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] Pass Pass [Member] Special Mention Special Mention [Member] Substandard Substandard [Member] Doubtful Doubtful [Member] Financial Instrument Performance Status [Axis] Financial Instrument Performance Status [Axis] Financial Instrument Performance Status [Domain] Financial Instrument Performance Status [Domain] Performing Performing Financial Instruments [Member] Nonperforming Nonperforming Financial Instruments [Member] Financing Receivable, Credit Quality Indicator [Line Items] Financing Receivable, Credit Quality Indicator [Line Items] 2020 Financing Receivable, Originated in Current Fiscal Year 2019 Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year 2018 Financing Receivable, Originated Two Years before Latest Fiscal Year 2017 Financing Receivable, Originated Three Years before Latest Fiscal Year 2016 Financing Receivable, Originated Four Years before Latest Fiscal Year Prior Financing Receivable, Originated Five or More Years before Latest Fiscal Year Recorded Investment of Revolving Loans Financing Receivable, Revolving Recorded Investment of Revolving Loans Converted to Term Loans Financing Receivable, Revolving, Converted To Term Loan Financing Receivable, Revolving, Converted To Term Loan Total Financing Receivable, before Allowance for Credit Loss Loans Cash and due from banks Cash and Due from Banks Federal funds sold, securities purchased under agreements to resell and interest bearing deposits Federal Funds Sold, Securities Purchased Under Agreement to Resell and Interest Bearing Deposits Federal Funds Sold, Securities Purchased Under Agreement to Resell and Interest Bearing Deposits Cash and cash equivalents Trading account assets Debt Securities, Trading, and Equity Securities, FV-NI Debt securities held to maturity, net of allowance for debt securities held to maturity losses of $1,892 at March 31, 2020 (fair value of $8,267,393 and $6,921,158 at March 31, 2020 and December 31, 2019, respectively) Debt Securities, Held-to-maturity, Net of Allowance for Credit Losses Debt Securities, Held-to-maturity, Net of Allowance for Credit Losses Loans held for sale, at fair value Allowance for loan losses Loans and Leases Receivable, Allowance Net loans Loans and Leases Receivable, Net Amount Premises and equipment, net Property, Plant and Equipment, Net Bank owned life insurance Bank Owned Life Insurance Other assets Other Assets Total assets Assets Deposits: Deposits [Abstract] Noninterest bearing Noninterest-bearing Deposit Liabilities Interest bearing Interest-bearing Deposit Liabilities Total deposits Deposits FHLB and other borrowings Long-term Debt Federal funds purchased and securities sold under agreements to repurchase Federal Funds Purchased and Securities Sold under Agreements to Repurchase and Other Short-term Borrowings Federal Funds Purchased and Securities Sold under Agreements to Repurchase and Other Short-term Borrowings Accrued expenses and other liabilities Accrued Liabilities and Other Liabilities Total liabilities Liabilities Shareholder’s Equity: Series A Preferred stock, $.0.01 par value, liquidation preference $200,000 per share, authorized — 30,000,000 shares, issued — 1,150 at both March 31, 2020 and December 31, 2019 Common stock — $0.01 par value; authorized — 300,000,000 shares, issued — 222,963,891 shares at both March 31, 2020 and December 31, 2019, respectively Common Stock, Value, Issued Surplus Additional Paid in Capital Accumulated deficit Retained Earnings (Accumulated Deficit) Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Total BBVA USA Bancshares, Inc. shareholder’s equity Stockholders' Equity Attributable to Parent Noncontrolling interests Stockholders' Equity Attributable to Noncontrolling Interest Total shareholder’s equity Total liabilities and shareholder’s equity Liabilities and Equity Summary of activity related to the Company's goodwill Schedule of Goodwill [Table Text Block] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Total AOCI Attributable to Parent [Member] Unrealized Gains (Losses) on Debt Securities Available for Sale and Transferred to Held to Maturity Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Comprehensive Income [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Balance, beginning of period Cumulative effect adjustment related to ASU adoptions Cumulative Effect of New Accounting Principle in Period of Adoption Balance, as adjusted Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance Other comprehensive income before reclassifications Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Amounts reclassified from accumulated other comprehensive income (loss) Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Net current period other comprehensive income Other Comprehensive Income (Loss), Net of Tax Balance, end of period 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] Reported value measurement Reported Value Measurement [Member] Estimate of fair value measurement Estimate of Fair Value Measurement [Member] Fair Value, Inputs, Level 1 Fair Value, Inputs, Level 2 Assets: Assets, Fair Value Disclosure [Abstract] Cash and cash equivalents, estimated fair value Cash and Cash Equivalents, Fair Value Disclosure Debt securities held to maturity Loans Loans and Leases Receivable, Gross Loans, net, estimated fair value Loans Receivable, Fair Value Disclosure Liabilities: Liabilities, Fair Value Disclosure [Abstract] Deposits Deposits, estimated fair value Deposits, Fair Value Disclosure FHLB and other borrowings Federal Home Loan Bank and Other Borrowings Federal Home Loan Bank and Other Borrowings FHLB and other borrowings, estimated fair value Federal Home Loan Bank and Other Borrowings, Fair Value Disclosure Federal Home Loan Bank and Other Borrowings, Fair Value Disclosure Federal funds purchased and securities sold under agreements to repurchase Federal Funds Purchased and Securities Sold under Agreements to Repurchase Federal funds purchased and securities sold under agreements to repurchase, estimated fair value Federal Funds Purchased and Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure Schedule of commitments to extend credit, standby letters of credit and commercial letters of credit Schedule of Commitments to Extend Credit, Standby Letters of Credit and Commercial Letters of Credit [Table Text Block] Schedule of Commitments to Extend Credit, Standby Letters of Credit and Commercial Letters of Credit [Table Text Block] Schedule of adjusted cost and approximate fair value of investment securities available for sale and investments held to maturity Marketable Securities [Table Text Block] Schedule of fair value and gross unrealized losses of available for sale and held to maturity securities that were in a loss position Schedule of Unrealized Loss on Investments [Table Text Block] Schedule of allowance for credit losses for debt securities held to maturity Debt Securities, Held-to-maturity, Allowance for Credit Loss [Table Text Block] Schedule of debt securities held to maturity through credit ratings Debt Securities, Held-to-maturity, Credit Quality Indicator [Table Text Block] Schedule of investments classified by contractual maturity date Investments Classified by Contractual Maturity Date [Table Text Block] Schedule of gross realized gains and losses Schedule of Realized Gain (Loss) [Table Text Block] Derivatives and Hedging Derivative Instruments and Hedging Activities Disclosure [Text Block] Financing Receivable, Troubled Debt Restructuring [Table] Financing Receivable, Troubled Debt Restructuring [Table] Financing Receivable, Troubled Debt Restructuring [Line Items] Financing Receivable, Troubled Debt Restructuring [Line Items] Number of Contracts Financing Receivable, Modifications, Number of Contracts Post-Modification Outstanding Recorded Investment Number of subsequent default contracts Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts Recorded investment at subsequent default Financing Receivable, Troubled Debt Restructuring, Subsequent Default Schedule of segment reporting information Schedule of Segment Reporting Information, by Segment [Table Text Block] Entity [Abstract] Entity [Abstract] 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 Filer Category Entity Filer Category Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Entity Shell Company Entity Shell Company Amendment Flag Amendment Flag Entity Emerging Growth Company Entity Emerging Growth Company Entity Small Business Entity Small Business Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Financing Receivable, Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Allowance for Loan and Lease Losses [Roll Forward] Allowance for Loan and Lease Losses [Roll Forward] Balance at beginning of period Provision for loan losses Provision for Loan, Lease, and Other Losses Loans charged-off Financing Receivable, Allowance for Credit Loss, Writeoff Loan recoveries Financing Receivable, Allowance for Credit Loss, Recovery Net charge-offs Financing Receivable, Allowance for Credit Loss, Writeoff, Net Financing Receivable, Allowance for Credit Loss, Writeoff, Net Balance at end of period Ending balance of allowance attributable to loans: Ending Balance of Allowance Attributable to Loans [Abstract] Ending Balance of Allowance Attributable to Loans [Abstract] Individually evaluated for impairment Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment Collectively evaluated for impairment Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment Total allowance for loan losses Ending balance of loans: Ending Balance of Loans [Abstract] Ending Balance of Loans [Abstract] Individually evaluated for impairment Financing Receivable, Individually Evaluated for Impairment Collectively evaluated for impairment Financing Receivable, Collectively Evaluated for Impairment Debt Securities, Held-to-maturity, Allowance for Credit Loss [Table] Debt Securities, Held-to-maturity, Allowance for Credit Loss [Table] Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items] Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items] Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward] Debt Securities, Held-to-maturity, Allowance for Credit Loss [Roll Forward] Balance at beginning of period Provision for credit losses Debt Securities, Held-to-maturity, Credit Loss Expense (Reversal) Securities charged off Debt Securities, Held-to-maturity, Allowance for Credit Loss, Writeoff Recoveries Debt Securities, Held-to-maturity, Allowance for Credit Loss, Recovery Balance at end of period Fair Value Measurements Fair Value Disclosures [Text Block] Change in components of other comprehensive income (loss) Comprehensive Income (Loss) [Table Text Block] Schedule of accumulated other comprehensive income (loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of reclassifications out of accumulated other comprehensive income Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Loans and Allowance for Loan Losses Financing Receivables [Text Block] Investment securities available for sale, amortized cost [Abstract] Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost [Abstract] Maturing within one year Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost Maturing after one but within five years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost Maturing after five but within ten years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost Maturing after ten years Debt Securities, Available-for-sale, Allocated and Single Maturity Date, Maturity, after 10 Years, Amortized Cost Total single date maturities Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost Mortgage-backed securities and collateralized mortgage obligations Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Amortized Cost Investment securities available for sale, fair value [Abstract] Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value [Abstract] Maturing within one year Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value Maturing after one but within five years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value Maturing after five but within ten years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value Maturing after ten years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value Total single date maturities Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value Mortgage-backed securities and collateralized mortgage obligations Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Fair Value Total Held-to-maturity securities, amortized cost [Abstract] Debt Securities, Held-to-maturity, Maturity, Amortized Cost, Net [Abstract] Maturing within one year Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost Maturing after one but within five years Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost Maturing after five but within ten years Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost Maturing after ten years Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after 10 Years, Amortized Cost Total single date maturities Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Amortized Cost Collateralized mortgage obligations Debt Securities, Held-to-maturity, Maturity, without Single Maturity Date, Amortized Cost Held-to-maturity securities, fair value [Abstract] Debt Securities, Held-to-maturity, Maturity, Fair Value [Abstract] Maturing within one year Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value Maturing after one but within five years Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value Maturing after five but within ten years Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value Maturing after ten years Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value Total single date maturities Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Fair Value Collateralized mortgage obligations Debt Securities, Held-to-maturity, Maturity, without Single Maturity Date, Fair Value Total Schedule of Assets Sold under Agreements to Repurchase [Table] Schedule of Assets Sold under Agreements to Repurchase [Table] Mortgage-backed securities Securities or Other Assets Sold under Agreements to Repurchase, Maturity Periods [Axis] Repurchase Agreements and Similar Transactions, Maturity Periods [Axis] Assets Sold under Agreements to Repurchase, Maturity Period [Domain] Repurchase Agreements and Similar Transactions, Maturity Periods [Domain] Overnight and Continuous Maturity Overnight [Member] Up to 30 days Maturity Less than 30 Days [Member] 30 - 90 days Maturity 30 to 90 Days [Member] Greater Than 90 days Maturity Greater than 90 Days [Member] Assets Sold under Agreements to Repurchase [Line Items] Assets Sold under Agreements to Repurchase [Line Items] Securities sold under agreements repurchase Financial Assets Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement Schedule of ASC 326 impact Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Operating Segments Operating Segments [Member] Corporate Support and Other Corporate, Non-Segment [Member] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Corporate and Investment Banking Corporate and Investment Banking [Member] Corporate and Investment Banking [Member] Treasury Treasury [Member] Treasury [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Net interest income (expense) Provision for credit losses Noninterest income Noninterest expense Income tax expense (benefit) Average assets Average Assets Average Assets Debt Securities Available for Sale and Debt Securities Held to Maturity Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Statement of Stockholders' Equity [Abstract] Common Stock Common Stock [Member] Surplus Additional Paid-in Capital [Member] Accumulated Deficit Retained Deficit [Member] Retained Deficit [Member] Accumulated Other Comprehensive Income (Loss) Non-Controlling Interests Noncontrolling Interest [Member] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] ASU 2016-02, 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Comprehensive Income (Loss), Net of Tax [Abstract] Net unrealized gains arising during period from debt securities available for sale Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax Less: reclassification adjustment for net gains on sale of debt securities available for sale in net income Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Net change in net unrealized holding gains on debt securities available for sale Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax Change in unamortized net holding gains on debt securities held to maturity Other Comprehensive Loss, Held-to-maturity Security, Adjustment from AOCI for Accretion of Noncredit Portion of OTTI, after Tax Change in unamortized non-credit related impairment on debt securities held to maturity Other than Temporary Impairment Losses, Investments, Portion in Other Comprehensive Loss, Net of Tax, Portion Attributable to Noncontrolling Interest, Held-to-maturity Securities Net change in unamortized holding gains on debt securities held to maturity Other Comprehensive Loss, Held-to-maturity Security, OTTI, after Tax and Adjustments Unrealized holding gains arising during period from cash flow hedge instruments Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Change in defined benefit plans Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax Other comprehensive income, net of tax Comprehensive (loss) income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Less: comprehensive income attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Comprehensive (loss) income attributable to BBVA USA Bancshares, Inc. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Securities Financing Activities Assets and Liabilities Subject to Enforceable Master Netting Arrangements [Text Block] Assets and Liabilities Subject to Enforceable Master Netting Arrangements [Text Block] Schedule of supplemental cash flow disclosures Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Schedule of cash and cash equivalents Schedule of Cash and Cash Equivalents [Table Text Block] Schedule of restricted cash equivalents Restrictions on Cash and Cash Equivalents [Table Text Block] Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Measurement Input Type [Axis] Measurement Input Type [Axis] Measurement Input Type [Domain] Measurement Input Type [Domain] Closing ratios Measurement Input, Closing Ratio [Member] Measurement Input, Closing Ratio [Member] Cap grids Measurement Input, Cap Rate [Member] Discount rate Measurement Input, Discount Rate [Member] Constant prepayment rate or life speed Measurement Input, Constant Prepayment Rate [Member] Cost to service Measurement Input, Cost To Service [Member] Measurement Input, Cost To Service [Member] Transaction price Measurement Input, Transaction Price [Member] Measurement Input, Transaction Price [Member] Prepayment rate Measurement Input, Prepayment Rate [Member] Default rate Measurement Input, Default Rate [Member] Loss severity Measurement Input, Loss Severity [Member] Appraised value Measurement Input, Appraised Value [Member] Average Weighted Average [Member] Debt securities held to maturity Investments [Member] Impaired loans Impaired Loans [Member] Impaired Loans [Member] OREO Other Real Estate Owned [Member] Other Real Estate Owned [Member] Valuation Approach and Technique [Axis] Valuation Approach and Technique [Axis] Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Discounted cash flow Valuation, Income Approach [Member] Appraised value Valuation, Market Approach [Member] Fair Value Inputs, Liabilities, Quantitative Information [Line Items] (Deprecated 2018-01-31) Fair Value Measurement Inputs and Valuation Techniques [Line Items] Derivative asset, measurement input Derivative Asset, Measurement Input Other assets, measurement input Other Assets, Measurement Input Other Assets, Measurement Input Debt securities held to maturity, estimated fair value, measurement input Debt Securities, Held-to-maturity, Fair Value, Measurement Input Debt Securities, Held-to-maturity, Fair Value, Measurement Input Impaired loans Impaired Financing Receivable, Recorded Investment Impaired loans, measurement input Impaired Financing Receivable, Recorded Investment, Measurement Input Impaired Financing Receivable, Recorded Investment, Measurement Input Other real estate owned Other Real Estate Other real estate owned, measurement input Other Real Estate, Measurement Input Other Real Estate, Measurement Input Futures contracts Future [Member] Interest rate lock commitments Option contracts related to mortgage servicing rights Forward contracts related to residential mortgage loans held for sale Interest rate contracts for customers Purchased equity option related to equity-linked CDs Written equity option related to equity-linked CDs Forward and swap contracts related to commercial loans Spot contracts related to commercial loans Foreign currency exchange contracts for customers Mortgage banking income and corporate and correspondent investment sales Mortgage Banking Income and Corporate and Correspondent Investment Sales [Member] Mortgage Banking Income and Corporate and Correspondent Investment Sales [Member] Mortgage banking income Mortgage Banking Income [Member] Mortgage Banking Income [Member] Other expense Noninterest Expense, Other [Member] Noninterest Expense, Other [Member] Other income Other Income [Member] Corporate and correspondent investment sales Corporate and Correspondant Investment Sales [Member] Corporate and Correspondant Investment Sales [Member] Derivative instruments not designated as hedging instruments, gain (loss), net Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Debt Security Category [Axis] Debt Security Category [Axis] Other than Temporary Impairment, Credit Losses Recognized in Earnings, Categories of Investments [Domain] Other than Temporary Impairment, Credit Losses Recognized in Earnings, Categories of Investments [Domain] Available-for-sale Securities Available-for-sale Securities [Member] Held-to-maturity Securities Held-to-maturity Securities [Member] Change in unamortized net holding gains on debt securities held to maturity Accumulated Gains (Losses) On Held-to-maturity Securities, Net Holding Losses [Member] Accumulated Gains (Losses) On Held-to-maturity Securities, Net Holding Losses [Member] Change in unamortized non-credit related impairment on debt securities held to maturity Accumulated Gains (Losses) On Held-to-maturity Securities, Non-Credit Impairment [Member] Accumulated Gains (Losses) On Held-to-maturity Securities, Non-Credit Impairment [Member] Unrealized Gains (Losses) on Debt Securities Held to Maturity AOCI, Accumulated Gain (Loss), Debt Securities, Held-to-maturity, Parent [Member] AOCI, Accumulated Gain (Loss), Debt Securities, Held-to-maturity, Parent [Member] Other Comprehensive Income (Loss), Pretax [Abstract] Other Comprehensive Income (Loss), before Tax [Abstract] Unrealized holding gains arising during period from debt securities available for sale Other Comprehensive Income (Loss), before Reclassifications, before Tax Less: reclassification adjustment for net gains on sale of debt securities in net income Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax Change in unamortized net holding gains on debt securities held to maturity Other Comprehensive Loss, Held-to-maturity Security, Adjustment from AOCI for Accretion of Noncredit Portion of OTTI, before Tax Change in unamortized non-credit related impairment on debt securities held to maturity Other than Temporary Impairment Losses, Investments, Portion in Other Comprehensive Loss, before Tax, Portion Attributable to Noncontrolling Interest, Held-to-maturity Securities Change in defined benefit plans Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), after Reclassification Adjustment, before Tax Other comprehensive income Other Comprehensive Income (Loss), before Tax Other Comprehensive Income (Loss), Tax Expense/(Benefit) [Abstract] Other Comprehensive Income (Loss), Tax [Abstract] Unrealized holding gains arising during period from debt securities available for sale Other Comprehensive Income (Loss) before Reclassifications, Tax Less: reclassification adjustment for net gains on sale of debt securities in net income Reclassification from AOCI, Current Period, Tax Change in unamortized net holding gains on debt securities held to maturity Other Comprehensive Loss, Held-to-maturity Security, Adjustment from AOCI for Accretion of Noncredit Portion of OTTI, Tax Change in unamortized non-credit related impairment on debt securities held to maturity Other than Temporary Impairment Losses, Investments, Portion in Other Comprehensive Loss, Tax, Portion Attributable to Noncontrolling Interest, Held-to-maturity Securities Change in defined benefit plans Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax Other comprehensive income Other Comprehensive Income (Loss), Tax Other Comprehensive Income (Loss), After-Tax [Abstract] Unrealized holding gains arising during period from debt securities available for sale Less: reclassification adjustment for net gains on sale of debt securities in net income Change in unamortized net holding losses on debt securities held to maturity Change in unamortized non-credit related impairment on debt securities held to maturity Change in defined benefit plans Derivative financial assets: Derivative Asset [Abstract] Derivative assets, total derivatives subject to a master netting arrangement, gross amounts recognized Derivative assets, total derivative subject to a master netting arrangement, gross amounts offset in the condensed consolidated balance sheet Derivative Asset, Fair Value, Gross Liability Derivative assets, total derivatives subject to a master netting arrangement, net amount presented in the condensed consolidated balance sheets Derivative Asset, Fair Value, Amount Not Offset Against Collateral Derivative assets, total derivatives subject to a master netting arrangement, financial instruments collateral received/pledged Derivative, Collateral, Obligation to Return Securities Derivate assets, total derivatives subject to a master netting arrangement, cash collateral received/pledged Derivative asset, total derivatives subject to a master netting arrangement, net amount Derivative Asset, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election Derivative assets, total derivatives not subject to a master netting arrangement Derivative Asset, Not Subject to Master Netting Arrangement Derivative assets, total derivatives not subject to a master netting arrangement, net amount Derivative Asset, Not Subject to Master Netting Arrangement Deduction Total derivative financial assets, gross amounts recognized Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement Total derivative financial assets, net amount presented in the condensed consolidated balance sheet Total derivative financial assets, net amount Derivative Asset, Fair Value, Amount Offset Against Collateral Derivative financial liabilities: Derivative Liability [Abstract] Derivative liabilities, total derivative subject to a master netting arrangement, gross amounts recognized Derivative liabilities, total derivative subject to a master netting arrangement, gross amount offset in the condensed consolidated balance sheets Derivative Liability, Fair Value, Gross Asset Derivative liabilities, total derivative subject to a master netting arrangement, net amount presented in the condensed consolidated balance sheets Derivative Liability, Fair Value, Amount Not Offset Against Collateral Derivative liabilities, total derivatives subject to a master netting arrangement, financial instruments collateral received/pledged Derivative, Collateral, Right to Reclaim Securities Derivative liabilities, total derivative subject to a master netting arrangement, cash collateral received/pledged Derivate liabilities, total derivatives subject to master netting arrangement, net amount Derivative Liability, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election Derivative liabilities, total derivatives not subject to a master netting arrangement Derivative Liability, Not Subject to Master Netting Arrangement Derivative liabilities, total derivatives not subject to a master netting arrangement, net amount Derivative Liability, Not Subject to Master Netting Arrangement Deduction Derivative liabilities, total derivative financial liabilities, gross amount recognized Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement Total derivative financial liabilities, net amount presented in the condensed consolidated balance sheets Total derivative financial liabilities, net amount Derivative Liability, Fair Value, Amount Offset Against Collateral Statement of Cash Flows [Abstract] Operating Activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Depreciation and amortization Depreciation, Amortization and Accretion, Net Accretion of discount, loan fees and purchase market adjustments, net Accretion (Amortization) of Discount, Loan Fees and Purchase Market Adjustments Accretion (Amortization) of Discount, Loan Fees and Purchase Market Adjustments Net change in trading account assets Increase (Decrease) in Debt Securities, Trading, and Equity Securities, FV-NI Net change in trading account liabilities Increase (Decrease) in Trading Liabilities Originations and purchases of mortgage loans held for sale Payments for Origination and Purchases of Loans Held-for-sale Sale of mortgage loans held for sale Proceeds from Sale of Loans Held-for-sale Deferred tax (benefit) expense Deferred Income Tax Expense (Benefit) Investment securities gains, net Debt and Equity Securities, Gain (Loss) Net gain on sale of premises and equipment Gain (Loss) on Disposition of Property Plant Equipment Loss on sale of loans Gain (Loss) on Sale of Loans Gain (Loss) on Sale of Loans Gain on sale of mortgage loans held for sale Net loss on sale of other real estate and other assets Gain (Loss) on Disposition of Other Assets Increase in other assets Increase (Decrease) in Other Operating Assets Increase in other liabilities Increase (Decrease) in Other Operating Liabilities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Investing Activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Proceeds from sales of debt securities available for sale Proceeds from Sale of Debt Securities, Available-for-sale Proceeds from prepayments, maturities and calls of debt securities available for sale Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale Purchases of debt securities available for sale Payments to Acquire Debt Securities, Available-for-sale Proceeds from prepayments, maturities and calls of debt securities held to maturity Proceeds from Maturities, Prepayments and Calls of Held-to-maturity Securities Purchases of debt securities held to maturity Payments to Acquire Held-to-maturity Securities Proceeds from sales of equity securities Proceeds from Sale of Equity Securities Proceeds from Sale of Equity Securities Purchases of equity securities Payments to Acquire Equity Securities Payments to Acquire Equity Securities Net change in loan portfolio Payments for (Proceeds from) Loans and Leases Proceeds from sales of loans Proceeds from Sale of Loans Receivable Purchases of premises and equipment Payments to Acquire Property, Plant, and Equipment Proceeds from sales of premises and equipment Proceeds from Sale of Property, Plant, and Equipment Proceeds from settlement of BOLI policies Proceeds from Life Insurance Policy Cash payments for premiums of BOLI policies Payment to Acquire Life Insurance Policy, Investing Activities Proceeds from sales of other real estate owned Proceeds from Sale of Other Real Estate Net cash (used in) provided by investing activities Net Cash Provided by (Used in) Investing Activities Financing Activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Net increase in total deposits Increase (Decrease) in Deposits Net increase in federal funds purchased and securities sold under agreements to repurchase Increase (Decrease) in Federal Funds Purchased and Securities Sold under Agreements to Repurchase, Net Net increase in other short-term borrowings Proceeds from Short-term Debt Proceeds from FHLB and other borrowings Proceeds from Issuance of Long-term Debt Repayment of FHLB and other borrowings Repayments of Long-term Debt Capital contribution for non-controlling interest Proceeds from Noncontrolling Interests Issuance of common stock Proceeds from Issuance of Common Stock Preferred dividends paid Payments of Ordinary Dividends, Preferred Stock and Preference Stock Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Net (decrease) increase in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash, cash equivalents and restricted cash at beginning of year Cash, cash equivalents and restricted cash at end of period Schedule of Guarantor Obligations [Table] Schedule of Guarantor Obligations [Table] Guarantor Obligations [Line Items] Guarantor Obligations [Line Items] Commitments to extend credit Unused Commitments to Extend Credit Standby and commercial letters of credit Guarantor Obligations, Current Carrying Value Reporting units with no remaining goodwill balance Reporting Units With No Remaining Goodwill Balance [Member] Reporting Units With No Remaining Goodwill Balance [Member] Number of reporting units Number of Reporting Units Recognized accumulated goodwill impairment losses Servicing Asset at Amortized Cost [Table] Servicing Asset at Amortized Cost [Table] Residential Mortgage Residential Mortgage [Member] Servicing Asset at Amortized Cost [Line Items] Servicing Asset at Amortized Cost [Line Items] Servicing Asset at Fair Value, Amount [Roll Forward] Servicing Asset at Fair Value, Amount [Roll Forward] Beginning balance Additions Servicing Asset at Fair Value, Additions Increase (decrease) in fair value: Servicing Asset at Fair Value, Changes in Fair Value Resulting from Changes in Valuation Inputs or Changes in Assumptions [Abstract] Due to changes in valuation inputs or assumptions Servicing Asset at Fair Value, Changes in Fair Value Resulting from Changes in Valuation Inputs or Changes in Assumptions Due to other changes in fair value Servicing Asset at Fair Value, Other Changes in Fair Value Ending balance