Receivables [Abstract] Allowance for loan impairment related to PCI loans Portion of allowance for loan losses allocated to PCI loans Portion of allowance for loan losses allocated to PCI loans Threshold at which large consumer real estate loans are individually evaluated for impairment Threshold at which large consumer real estate loans are individually evaluated for impairment Threshold at which large consumer real estate loans are individually evaluated for impairment Period after which past due loans are considered delinquent Period After Which Loans Are Considered Delinquent Period After Which Loans Are Considered Delinquent Period after which interest income on delinquent loans is discontinued Delinquent Period of Loan to Discontinued Interest Income Delinquent Period of Loan to Discontinued Interest Income Period of time at which delinquent loans are typically charged off Consumer Loans Are Typically Charged Off Consumer Loans Are Typically Charged Off Number of loans past due over 90 days and still accruing interest Financing Receivable, 90 Days or More Past Due, Still Accruing Number of PCI loans considered non-performing Non-Performing PCI Loans Non-Performing PCI Loans Minimum nonaccrual period for TDRs Troubled Debt Restructuring Non Accrual Period Minimum period a TDR loan is on non-accrual. Number of loans modified as a TDR that experienced a subsequent payment default in the preceding 12 months Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts Period at which loan is defined as having a payment default Number Of Days To Define Payment Default Number Of Days To Define Payment Default Period which non-performing other consumer loans are on nonaccrual status Period of time for Consumer Loans to be Past Due to be Classified as Non-Performing Period of time for Consumer Loans to be Past Due to be Classified as Non-Performing Share-based Payment Arrangement [Abstract] Compensation Cost Charged to Income for Share-based Compensation Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Summary of Nonvested Share Activity in Restricted Stock and Unrecognized Compensation Expense Schedule of Nonvested Share Activity [Table Text Block] Loans Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Statement of Comprehensive Income [Abstract] Net income Net Income (Loss) Attributable to Parent Change in unrealized gains (losses) on securities available for sale Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, before Tax Reclassification of amount realized through securities transactions Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Tax effect Other Comprehensive Income (Loss), Securities, Available-for-sale, Tax Reclassification of income tax effects of the Tax Cuts and Jobs Act Other Comprehensive Income (Loss), Tax Cuts And Jobs Act Of 2017, Reclassification Adjustment from AOCI Other Comprehensive Income (Loss), Tax Cuts And Jobs Act Of 2017, Reclassification Adjustment from AOCI Other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Investments, Debt and Equity Securities [Abstract] Schedule of Trading Securities and Other Trading Assets [Table] Debt Securities, Trading, and Equity Securities, FV-NI [Table] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Agency residential mortgage-backed securities Residential Mortgage Backed Securities [Member] Agency commercial mortgage-backed securities Commercial Mortgage Backed Securities [Member] Agency residential collateralized mortgage obligations Agency Collateralized Mortgage Backed Securities [Member] Agency Collateralized Mortgage Backed Securities Municipal bonds Municipal Bonds [Member] Available For Sale And Held To Maturity Securities [Line Items] Available For Sale And Held To Maturity Securities [Line Items] Available For Sale And Held To Maturity Securities [Line Items] HTM - Fair Value Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Fair Value [Abstract] Less than 12 Months Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value 12 Months or More Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value Total Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value HTM - Unrealized Loss Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position [Abstract] Less than 12 Months Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 12 Months or More Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Total Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss Commitments and Contingencies Disclosure [Abstract] Contractual Amounts of Financial Instruments with Off-Balance Sheet Risk Schedule of Fair Value, Off-balance Sheet Risks [Table Text Block] Financing Receivable, Credit Quality Indicator [Table] Financing Receivable, Credit Quality Indicator [Table] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Commercial Real Estate Commercial Real Estate Portfolio Segment [Member] Commercial and Industrial Commercial Portfolio Segment [Member] Construction and Land Construction And Land Portfolio Segment [Member] Construction And Land Portfolio Segment [Member] Consumer Real Estate Residential Mortgage [Member] 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] Financing Receivable, Credit Quality Indicator [Line Items] Financing Receivable, Credit Quality Indicator [Line Items] Loans held for investment Loans and Leases Receivable, Gross Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Commercial real estate Commercial and industrial Construction and land Consumer real estate Other consumer Consumer Portfolio Segment [Member] Financial Instrument Performance Status [Axis] Financial Instrument Performance Status [Axis] Financial Instrument Performance Status [Domain] Financial Instrument Performance Status [Domain] Non-performing Nonperforming Financial Instruments [Member] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Non-performing loans Loans and Leases Receivable, Nonperforming, Nonaccrual of Interest Accounting Policies [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Prosperity Bancshares Prosperity Bancshares, Inc. [Member] Prosperity Bancshares, Inc. [Member] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] LegacyTexas Financial Group LegacyTexas Financial Group [Member] LegacyTexas Financial Group [Member] Scenario [Axis] Scenario [Axis] Scenario [Domain] Scenario [Domain] Forecast Forecast [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Shares of common stock per stockholder under merger agreement (in shares) Business Acquisition, Equity Interest Issued Or Issuable, Number Of Shares Per Stockholder Business Acquisition, Equity Interest Issued Or Issuable, Number Of Shares Per Stockholder Cash consideration per share (in dollars per share) Business Combination, Cash Consideration Per Share Business Combination, Cash Consideration Per Share Cash paid per share of common stock (in dollars per share) Business Acquisition, Share Price Closing price (in dollars per share) Share Price Total consideration Business Combination, Consideration Transferred Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Financial Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Carrying amount Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net Outstanding balance Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance Allowance for loan losses Use of Estimates Use of Estimates, Policy [Policy Text Block] Consolidation Consolidation, Policy [Policy Text Block] Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Other-than-Temporary Impairment Marketable Securities, Policy [Policy Text Block] Allowance for Loan Losses Loans and Leases Receivable, Allowance for Loan Losses Policy [Policy Text Block] Loans Financing Receivable [Policy Text Block] Fair Value Fair Value Measurement, Policy [Policy Text Block] Derivatives Derivatives, Policy [Policy Text Block] Effect of Newly Issued But Not Yet Effective Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Fair Value Disclosures [Abstract] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Level 2 Fair Value, Inputs, Level 2 [Member] Measurement Frequency [Axis] Measurement Frequency [Axis] Measurement Frequency [Domain] Measurement Frequency [Domain] Recurring Fair Value, Recurring [Member] US government and agency securities US Government Agencies Debt Securities [Member] Interest rate lock commitments Interest Rate Lock Commitments [Member] Forward mortgage-backed securities trades Forward Contracts [Member] Interest rate swap Interest Rate Swap [Member] Counterparty Name [Axis] Counterparty Name [Axis] Counterparty Name [Domain] Counterparty Name [Domain] Loan customer counterparty Loan Customer Counterparty [Member] Loan Customer Counterparty [Member] Financial institution counterparty Financial Institution Counterparty [Member] Financial Institution Counterparty [Member] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Not designated as a hedging instrument Not Designated as Hedging Instrument [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] Total securities available for sale Debt Securities, Available-for-sale Loans held for sale Loans Held-for-sale, Fair Value Disclosure Derivative financial instruments - Assets Derivative Asset, Fair Value, Gross Asset Derivative financial instruments - Liabilities Derivative Liability, Fair Value, Gross Liability Aggregate principal balance of loans held for sale Loans Held-for-sale, Fair Value Disclosure, Outstanding Principal Balance Loans Held-for-sale, Fair Value Disclosure, Outstanding Principal Balance Loss Contingencies [Table] Loss Contingencies [Table] Unused commitments to extend credit Commitments to Extend Credit [Member] Unused line of credit Unused lines of Credit [Member] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Unused capacity on Warehouse Purchase Program loans Unused Capacity on Warehouse Purchase Program Loans [Member] Unused Capacity on Warehouse Purchase Program Loans [Member] Standby letters of credit Standby Letters of Credit [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Total unused commitments/capacity Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability Derivative [Table] Derivative [Table] IRLCs Forward mortgage-backed securities trades Commercial loan Commercial Loan [Member] Interest rate swaps and caps Loan customer counterparty Not designated as hedging Derivative [Line Items] Derivative [Line Items] Outstanding Notional Balance Derivative, Notional Amount Asset Derivative Fair Value Liability Derivative Fair Value Leases [Abstract] Supplemental Lease Information Lessee, Supplemental Lease Information [Table Text Block] Lessee, Supplemental Lease Information [Table Text Block] Maturity Analysis of Lease Liabilities Lessee, Operating Lease, Liability, Maturity [Table Text Block] Financing Receivable, Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Table] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Other liabilities Other Liabilities [Member] Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Allowance for loan losses: Financing Receivable, Allowance for Credit Loss [Roll Forward] Beginning balance Financing Receivable, Allowance for Credit Loss Charge-offs on lending-related commitments Financing Receivable, Allowance for Credit Loss, Writeoff Provision (benefit) for credit losses on lending-related commitments Provision for Other Credit Losses Ending balance Securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Fair Value Fair Value Disclosures [Text Block] Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-sale [Line Items] Amortized Cost Debt Securities, Available-for-sale, Amortized Cost Gross Unrealized Gains Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Gross Unrealized Losses Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax Fair Value Share-based Compensation Share-based Payment Arrangement [Text Block] Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Axis] Award Type [Domain] Award Type [Domain] Time-Vested Restricted Shares Outstanding Time-Vested Restricted Stock [Member] Time-Vested Restricted Stock [Member] Performance-Based Restricted Shares Outstanding Performance-Based Restricted Stock [Member] Performance-Based Restricted Stock [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Beginning balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Performance-based shares granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Performance-Based Shares Granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Performance-Based Shares Granted Vested/exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Forfeited/expired (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Ending balance (in shares) Weighted-Average Grant Date Fair Value per Share Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Beginning balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Performance-based shares granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Shares Granted, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Shares Granted, Weighted Average Grant Date Fair Value Vested/exercised (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Forfeited/expired (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Ending balance (in dollars per share) Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Beginning balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Vested/exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Forfeited/expired (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Ending balance (in shares) Weighted- Average Exercise Price per Share Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Beginning balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Granted (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Vested/exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Forfeited/expired (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Ending balance (in dollars per share) Percent increase in awarded amount over target if performance metrics are met Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Conditional Increase In Award, Percent Of Target Amount, Maximum Potential To Vest Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Conditional Increase In Award, Percent Of Target Amount Additional percent increase or decrease in total share award at vesting Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Additional Increase Or Decrease In Total Share Award At Vesting Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Additional Increase (Decrease) In Total Share Award At Vesting Maximum vesting percentage Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Maximum Award Issued, Percent Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Maximum Award Issued, Percent Target vesting percentage Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Target Vesting, Percent Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Target Vesting, Percent Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward] Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward] Beginning balance Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Reclassifications (to) from nonaccretable Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications (to) from Nonaccretable Difference Disposals Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Disposals of Loans Accretion Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion Balance at end of period Schedule of Fair Value, Off-balance Sheet Risks [Table] Schedule of Fair Value, Off-balance Sheet Risks [Table] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Domain] Guarantor Obligations, Nature [Domain] Financial guarantee Financial Guarantee [Member] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] Allowance for credit losses on off-balance sheet lending-related commitments and guarantees SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] Other liabilities Investment Type [Axis] Investment Type [Axis] Investments [Domain] Investments [Domain] FHLB letters of credit Federal Home Loan Bank Certificates and Obligations (FHLB) [Member] Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] Credit card guarantees Guarantor Obligations, Current Carrying Value Valuation reserves SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount Overdraft protection Bank Overdrafts, Overdraft Protection Bank Overdrafts, Overdraft Protection Loans pledged as collateral Loans Pledged as Collateral Unfunded commitments Commitment to Fund Private Equity Fund for Specific Purposes, Unfunded Portion Commitment to Fund Private Equity Fund for Specific Purposes, Unfunded Portion New Accounting Pronouncements and Changes in Accounting Principles [Abstract] Recent Accounting Developments New Accounting Pronouncements and Changes in Accounting Principles [Text Block] Basis of Financial Statement Presentation Basis of Presentation and Significant Accounting Policies [Text Block] Restricted stock Restricted Stock [Member] Stock options Share-based Payment Arrangement, Option [Member] Compensation cost charged to income for: Share-based Payment Arrangement, Noncash Expense [Abstract] Compensation cost Share-based Payment Arrangement, Expense Income tax benefit Share-based Payment Arrangement, Expense, Tax Benefit Revenue from Contract with Customer [Abstract] Revenue Recognition Revenue from Contract with Customer [Text Block] Statement of Financial Position [Abstract] Fair value of securities held-to-maturity Debt Securities, Held-to-maturity, Fair Value Allowance for loan losses on loans held for investment Loans and Leases Receivable, Allowance Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued 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 Unearned Employee Stock Ownership Plan, shares (in shares) Employee Stock Ownership Plan (ESOP), Number of Suspense Shares Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Credit exposure Credit Derivative, Maximum Exposure, Undiscounted Cash collateral pledged Derivative, Collateral, Obligation to Return Cash Schedule of Financing Receivable Allowance For Credit Losses [Table] Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] Class of Financing Receivable [Domain] Class of Financing Receivable [Domain] Loans Receivable, Excluding Warehouse Loans [Member] Loans Receivable, Excluding Warehouse Loans [Member] Loans Receivable, Excluding Warehouse Loans [Member] Other Consumer Financing Receivable Allowance For Credit Losses [Line Items] Charge-offs Recoveries Financing Receivable, Allowance for Credit Loss, Recovery Provision expense (benefit) Provision for Loan and Lease Losses Allowance ending balance: Financing Receivable, Allowance for Credit Loss, Additional Information [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 Loans: Financing Receivable, Additional Information, Loans [Abstract] Financing Receivable, Additional Information, Loans [Abstract] Individually evaluated for impairment Financing Receivable, Individually Evaluated for Impairment Collectively evaluated for impairment Financing Receivable, Collectively Evaluated for Impairment PCI loans Impaired Purchase Credit Loans Recorded Investment Impaired purchase credit loans recorded investment. Total Loans Proceeds Proceeds from Sale of Debt Securities, Available-for-sale Gross gains Debt Securities, Available-for-sale, Realized Gain Gross losses Debt Securities, Available-for-sale, Realized Loss Tax expense of securities gains/losses Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax Gain (loss) on derivatives not designated as hedging instruments Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Statement [Table] Statement [Table] Warehouse Purchase Program Warehouse Loans Receivable [Member] Warehouse Loans Receivable [Member] Statement [Line Items] Statement [Line Items] ASSETS Assets [Abstract] Cash and due from financial institutions Cash and Due from Banks Short-term interest-bearing deposits in other financial institutions Interest-bearing Deposits in Banks and Other Financial Institutions Total cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Securities available for sale, at fair value Securities held to maturity (fair value: June 30, 2019 — $128,864; December 31, 2018— $144,791) Debt Securities, Held-to-maturity Loans held for sale, at fair value Loans Receivable Held-for-sale, Amount Loans held for investment, net Loans and Leases Receivable, Net Amount Federal Home Loan Bank (“FHLB”) stock and other restricted securities, at cost Federal Home Loan Bank Stock Bank-owned life insurance Bank Owned Life Insurance Premises and equipment, net Property, Plant and Equipment, Net Goodwill Goodwill Other assets Other Assets Total assets Assets LIABILITIES AND SHAREHOLDERS’ EQUITY Liabilities and Equity [Abstract] Deposits Deposits [Abstract] Non-interest-bearing demand Noninterest-bearing Domestic Deposit, Demand Interest-bearing demand Interest-bearing Domestic Deposit, Demand Savings and money market Deposits, Savings Deposits Time Time Deposits Total deposits Deposits FHLB advances Advances from Federal Home Loan Banks Repurchase agreements Securities Sold under Agreements to Repurchase Subordinated debt Subordinated Debt Accrued expenses and other liabilities Other Liabilities Total liabilities Liabilities Commitments and contingent liabilities (See Note 11) Commitments and Contingencies Shareholders’ equity Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, $.01 par value; 10,000,000 shares authorized; 0 shares issued — June 30, 2019 and December 31, 2018 Preferred Stock, Value, Issued Common stock, $.01 par value; 90,000,000 shares authorized; 48,833,238 shares issued — June 30, 2019 and 48,505,261 shares issued — December 31, 2018 Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital, Common Stock Retained earnings Retained Earnings (Accumulated Deficit) Accumulated other comprehensive income (loss), net Accumulated Other Comprehensive Income (Loss), Net of Tax Unearned Employee Stock Ownership Plan (ESOP) shares; 1,112,664 shares at June 30, 2019 and 1,139,140 shares at December 31, 2018 Employee Stock Ownership Plan (ESOP), Deferred Shares Total shareholders’ equity Stockholders' Equity Attributable to Parent Total liabilities and shareholders’ equity Liabilities and Equity Significant Revenue Streams from Contracts with Customers Disaggregation of Revenue [Table Text Block] Statement of Stockholders' Equity [Abstract] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock Common Stock [Member] Additional Paid-In Capital Additional Paid-in Capital [Member] Retained Earnings Retained Earnings [Member] Accumulated Other Comprehensive Income (Loss), Net AOCI Attributable to Parent [Member] Unearned ESOP Shares Unearned Esop Shares [Member] Unearned ESOP shares. Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Balance Net income Other comprehensive income, net of tax Reclassification of income tax effects of the Tax Cuts and Jobs Act Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect Dividends declared Dividends, Common Stock, Cash ESOP shares earned Amortization of ESOP Award Share-based compensation expense APIC, Share-based Payment Arrangement, Increase for Cost Recognition Activity in employee stock plans Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture Balance Amortized Cost, Related Gross Unrealized Gains and Losses, and Fair Value of Securities Available for Sale Schedule of Available-for-sale Securities Reconciliation [Table Text Block] Amortized Cost, Related Gross Unrealized Gains and Losses, and Fair Value of Securities Held to Maturity Debt Securities, Held-to-maturity [Table Text Block] Amortized Cost and Fair Value of Held to Maturity Debt Securities and Fair Value of Available-for-Sale Debt Securities by Contractual Maturity Investments Classified by Contractual Maturity Date [Table Text Block] Securities Sales Activity Gain (Loss) on Securities [Table Text Block] Securities with Unrealized Losses Schedule of Unrealized Loss on Investments [Table Text Block] Debt Securities, Held-to-maturity [Table] Debt Securities, Held-to-maturity [Table] Collateral [Axis] Collateral [Axis] Collateral [Domain] Collateral [Domain] Pledged as Collateral Collateral Pledged [Member] Schedule of Held-to-maturity Securities [Line Items] Schedule of Held-to-maturity Securities [Line Items] Carrying value of securities pledged as collateral Debt Securities, Held-to-Maturity Debt Securities, Held-to-Maturity Number of securities in unrealized losses Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions Number of securities in unrealized losses for greater than one year Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions Amortized Cost Gross Unrealized Gains Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain Gross Unrealized Losses Fair Value Class of Financing Receivable [Axis] Performing Performing Financial Instruments [Member] Other consumer credit exposure Financing Receivable, before Allowance for Credit Loss Balance sheet: Assets and Liabilities, Lessee [Abstract] Operating lease asset classified as premises and equipment Operating Lease, Right-of-Use Asset Operating lease liability classified as other liabilities Operating Lease, Liability Income statement: Lease, Cost [Abstract] Operating lease cost classified as occupancy and equipment expense Operating Lease, Cost Weighted average lease term, in years Operating Lease, Weighted Average Remaining Lease Term Weighted average discount rate Operating Lease, Weighted Average Discount Rate, Percent Operating cash flows Operating Lease, Payments Income Statement [Abstract] Interest and dividend income Interest and Dividend Income, Operating [Abstract] Loans, including fees Interest and Fee Income, Loans and Leases Taxable securities Interest Income, Securities, Operating, Taxable Nontaxable securities Interest Income, Securities, Operating, Tax Exempt Interest-bearing deposits in other financial institutions Interest Income, Deposits with Financial Institutions FHLB and FRB stock and other Interest And Dividend Income Federal Home Loan Bank And Federal Reserve Bank Stock Interest and dividend income on FHLB and Federal Reserve Bank stock. Total interest and dividend income Interest and Dividend Income, Operating Interest expense Interest Expense [Abstract] Deposits Interest Expense, Deposits FHLB advances Interest Expense, Federal Home Loan Bank and Federal Reserve Bank Advances, Short-term Repurchase agreements and other borrowings Interest Expense, Other Total interest expense Interest Expense Net interest income Interest Income (Expense), Net Provision for credit losses Provision for Loan, Lease, and Other Losses Net interest income after provision for credit losses Interest Income (Expense), after Provision for Loan Loss Non-interest income Noninterest Income [Abstract] Service charges and other fees Service Charges And Other Fees Service Charges And Other Fees Net gain on sale of mortgage loans held for sale Gain (Loss) on Sales of Loans, Net Bank-owned life insurance income Bank Owned Life Insurance Income Net gain (loss) on securities transactions Debt and Equity Securities, Realized Gain (Loss) Gain (loss) on sale and disposition of assets Gain (Loss) on Sale of Assets and Asset Impairment Charges Other Noninterest Income, Other Operating Income Total non-interest income Noninterest Income Non-interest expense Noninterest Expense [Abstract] Salaries and employee benefits Labor and Related Expense Merger costs Business Combination, Integration Related Costs Advertising Advertising Expense Occupancy and equipment Occupancy, Net Outside professional services Professional Fees Regulatory assessments Federal Deposit Insurance Corporation Premium Expense Data processing Information Technology and Data Processing Office operations Non-interest expense - Office Operations Non-interest expense - Office Operations Other Other Noninterest Expense Total non-interest expense Noninterest Expense Income before income tax expense Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Income tax expense Income Tax Expense (Benefit) Net income Earnings per share: Earnings Per Share [Abstract] Basic (in dollars per share) Earnings Per Share, Basic Diluted (in dollars per share) Earnings Per Share, Diluted Dividends declared (in dollars per share) Common Stock, Dividends, Per Share, Declared Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Loans Held for Investment, Excluding Warehouse Purchase Program Level 1 Fair Value, Inputs, Level 1 [Member] Level 3 Fair Value, Inputs, Level 3 [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Financial Assets at Carrying Value Cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Securities held to maturity FHLB and other restricted securities, at cost Financial Assets at Fair value Assets, Fair Value Disclosure [Abstract] Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Securities held to maturity Loans held for investment, net Loans Receivable, Fair Value Disclosure FHLB and other restricted securities, at cost Accrued interest receivable Interest Receivable Financial Liabilities at Carrying Value Liabilities [Abstract] Deposits FHLB advances Subordinated debt Accrued interest payable Interest Payable Financial Liabilities at Fair Value Financial Liabilities Fair Value Disclosure [Abstract] Deposits Deposits, Fair Value Disclosure FHLB advances Federal Home Loan Bank Borrowings, Fair Value Disclosure Repurchase agreement Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure Subordinated debt Subordinated Debt Obligations, Fair Value Disclosure Accrued interest payable Accrued Liabilities, Fair Value Disclosure Leases Lessee, Operating Leases [Text Block] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] HTM - Amortized Cost Debt Securities, Held-to-maturity, Maturity, Amortized Cost, Net [Abstract] Due in one year or less Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost Due after one to five years Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost Due after five to ten years Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost Due after ten years Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after 10 Years, Amortized Cost Held-to-maturity securities, amortized cost Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Amortized Cost HTM - Fair Value Debt Securities, Held-to-maturity, Maturity, Fair Value, Rolling Maturity [Abstract] Due in one year or less Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value Due after one to five years Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value Due after five to ten years Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value Due after ten years Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value Held-to-maturity securities, fair value Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Fair Value AFS - Fair Value Debt Securities, Available-for-sale, Maturity, Fair Value, Rolling Maturity [Abstract] Due in one year or less Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value Due after one to five years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value Due after five to ten years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value Due after ten years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value Available-for-sale securities, fair value Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value Statement of Cash Flows [Abstract] Cash flows from operating activities Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Provision for credit losses Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Deferred tax benefit Deferred Income Tax Expense (Benefit) Premium amortization and accretion of securities, net Accretion (Amortization) of Discounts and Premiums, Investments Accretion related to acquired loans Amortization of Debt Discount (Premium) Net (gain) loss on securities transactions Debt and Equity Securities, Gain (Loss) ESOP compensation expense Employee Stock Ownership Plan (ESOP), Compensation Expense Share-based compensation expense Share-based Payment Arrangement, Noncash Expense Excess tax benefit on vesting of stock awards Excess Tax Benefit from Share-based Compensation, Operating Activities Net gain on loans held for sale Loans originated or purchased for sale Payments for Origination of Mortgage Loans Held-for-sale Proceeds from sale of loans held for sale Proceeds from Sale of Loans Held-for-sale FHLB stock dividends Fhlb Stock Dividends FHLB stock dividends. Bank-owned life insurance income (Gain) loss on sale and disposition of repossessed assets, premises and equipment Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Net change in deferred loan fees/costs Increase (Decrease) in Loans, Deferred Income Net change in accrued interest receivable Increase (Decrease) in Accrued Interest Receivable, Net Net change in other assets Increase (Decrease) in Other Operating Assets Net change in other liabilities Increase (Decrease) in Other Operating Liabilities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities Net Cash Provided by (Used in) Investing Activities [Abstract] Available-for-sale securities: Debt Securities, Available-for-sale [Abstract] Maturities, prepayments and calls Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale Purchases Payments to Acquire Debt Securities, Available-for-sale Proceeds from sale of AFS securities Held-to-maturity securities: Proceeds from Sale and Maturity of Held-to-maturity Securities [Abstract] Maturities, prepayments and calls Proceeds from Maturities, Prepayments and Calls of Held-to-maturity Securities Purchases Payments to Acquire Held-to-maturity Securities Originations of Warehouse Purchase Program loans Payments for Warehouse Purchase Program Loan Held for Investment Payments for Warehouse Purchase Program Loan Held for Investment Proceeds from pay-offs of Warehouse Purchase Program loans Proceeds from Warehouse Purchase Program Loan Held for Investment Proceeds from Warehouse Purchase Program Loan Held for Investment Net change in loans held for investment, excluding Warehouse Purchase Program loans Payments to Acquire Loans Held-for-investment Purchase of FHLB and Federal Reserve Bank stock and other Payments For Federal Home Loan Bank Stock, Federal Reserve Bank Stock And Other Stock Payments For Federal Home Loan Bank Stock, Federal Reserve Bank Stock And Other Stock Purchases of premises and equipment Payments to Acquire Property, Plant, and Equipment Proceeds from sale of assets Proceeds from Sales of Assets, Investing Activities Net cash (used in) investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Net change in deposits Increase (Decrease) in Deposits Proceeds from FHLB advances Proceeds from FHLBank Borrowings, Financing Activities Repayments on FHLB advances Payments of FHLBank Borrowings, Financing Activities Proceeds from (repayments of) borrowings Proceeds from (Repayments of) Debt Payment of dividends Payments of Ordinary Dividends, Common Stock Activity in employee stock plans Proceeds from Stock Plans Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Net change in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Beginning cash and cash equivalents Ending cash and cash equivalents Supplemental noncash disclosures: Other Noncash Investing and Financing Items [Abstract] Transfers from loans to other real estate owned Real Estate Owned, Transfer to Real Estate Owned Leased assets obtained in exchange for new operating lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Cover page. Document Type Document Type Document Fiscal Period Focus Document Fiscal Period Focus Document Quarterly Report Document Quarterly Report Document Period End Date Document Period End Date Document Transition Report Document Transition Report Amendment Flag Amendment Flag Document Fiscal Year Focus Document Fiscal Year Focus Current Fiscal Year End Date Current Fiscal Year End Date Entity File Number Entity File Number Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key 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 Entity Address, Postal Zip Code Entity Address, Postal Zip Code City Area Code City Area Code Local Phone Number Local Phone Number Title of 12(b) Security Title of 12(b) Security Trading Symbol Trading Symbol Security Exchange Name Security Exchange Name Entity Current Reporting Status Entity Current Reporting Status Entity Interactive Data Current Entity Interactive Data Current Entity Filer Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Shell Company Entity Shell Company Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Non-vested restricted shares Non-vested stock options Unrecognized compensation expense Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Weighted-average period of expense Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Troubled Debt Restructuring, Debtor, Current Period [Table] Troubled Debt Restructuring, Debtor, Current Period [Table] Nonaccrual TDRs Performing TDRs Troubled Debt Restructuring, Debtor, Current Period [Line Items] Troubled Debt Restructuring, Debtor, Current Period [Line Items] TDRs Financing Receivable, Troubled Debt Restructuring Outstanding commitments to lend additional funds to borrowers with TDR loans Financing Receivable, Troubled Debt Restructuring, Commitment to Lend Basic earnings per share: Earnings Per Share, Basic [Abstract] Numerator: Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Net income Gross Profit Distributed and undistributed earnings to participating securities Participating Securities, Distributed and Undistributed Earnings (Loss), Basic Income available to common shareholders Net Income (Loss) Available to Common Stockholders, Basic Denominator: Weighted Average Number of Shares Outstanding, Basic [Abstract] Weighted average common shares outstanding (in shares) Weighted Average Number of Shares Issued, Basic Less: Average unallocated ESOP shares (in shares) Weighted Average Number of Shares, Employee Stock Ownership Plan Shares Not Committed to be Released Average unvested restricted stock awards (in shares) Weighted Average Number of Shares, Restricted Stock Average shares for basic earnings per share (in shares) Weighted Average Number of Shares Outstanding, Basic Basic earnings per common share (in dollars per share) Diluted earnings per share: Earnings Per Share, Diluted [Abstract] Numerator: Net Income (Loss) Available to Common Stockholders, Diluted [Abstract] Income available to common shareholders Net Income (Loss) Available to Common Stockholders, Diluted Denominator: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Average shares for basic earnings per share (in shares) Dilutive effect of share-based compensation plan (in shares) Weighted Average Number Diluted Shares Outstanding Adjustment Average shares for diluted earnings per share (in shares) Weighted Average Number of Shares Outstanding, Diluted Diluted earnings per common share (in dollars per share) Share awards excluded in the computation of diluted earnings per share because the exercise price was greater than the common stock average market price and were therefore antidilutive (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Other Other Portfolio Segment [Member] Other Portfolio Segment [Member] Non-recurring Fair Value, Nonrecurring [Member] Impaired loans Foreclosed assets Other Real Estate, Foreclosed Assets, and Repossessed Assets Dividends declared (in dollars per share) ESOP shares earned (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Activity in employee stock plans (in shares) Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Card services income Card Services [Member] Card Services [Member] Service charges on deposits Deposit Service Charges [Member] Deposit Service Charges [Member] Title income Title Insurance Policies [Member] Title Insurance Policies [Member] Gains (losses) on the sale of other real estate owned Other Real Estate Owned Sales [Member] Other Real Estate Owned Sales [Member] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Revenue from contracts with customers Revenue from Contract with Customer, Excluding Assessed Tax Earnings Per Common Share Earnings Per Share [Text Block] Schedule of 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 and Greater 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] Total Loans Past Due Financing Receivable, Past Due Current Loans Financing Receivable, Not Past Due Schedule of Impaired Financing Receivable [Table] Schedule of Impaired Financing Receivable [Table] Financing Receivable, Impaired [Line Items] Financing Receivable, Impaired [Line Items] Average Recorded Investment Impaired Financing Receivable, Average Recorded Investment Interest Income Recognized Impaired Financing Receivable, Interest Income, Accrual Method Notional Balances and Fair Values of Outstanding Positions and Income (Loss) from Derivatives Derivative Instruments, Gain (Loss) [Table Text Block] Weighted Average Received and Paid for Interest Rate Swaps Schedule of Derivative Instruments [Table Text Block] Unpaid Contractual Principal Balance Impaired Financing Receivable, Unpaid Principal Balance Recorded Investment With No Allowance Impaired Financing Receivable, with No Related Allowance, Recorded Investment Recorded Investment With Allowance Impaired Financing Receivable, with Related Allowance, Recorded Investment Total Recorded Investment Impaired Financing Receivable, Recorded Investment Related Allowance Impaired Financing Receivable, Related Allowance Assets and Liabilities Measured at Fair Value on a Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis Fair Value Measurements, Nonrecurring [Table Text Block] Carrying Amount and Fair Value of Financial Instruments Not Recorded at Fair Value Fair Value, by Balance Sheet Grouping [Table Text Block] Received Derivative, Fixed Interest Rate, Received Derivative, Fixed Interest Rate, Received Paid Derivative, Fixed Interest Rate, Paid Derivative, Fixed Interest Rate, Paid Reconciliation of Numerator and Denominator of Basic and Diluted Earnings per Common Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Statistical Measurement [Axis] Statistical Measurement [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] ASU 2016-02 Accounting Standards Update 2016-02 [Member] Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Renewal terms Lessee, Operating Lease, Renewal Term Right of use asset Lease liability Financing Receivable, Troubled Debt Restructuring [Table] Financing Receivable, Troubled Debt Restructuring [Table] Loan Restructuring Modification [Axis] Loan Restructuring Modification [Axis] Loan Restructuring Modification [Domain] Loan Restructuring Modification [Domain] Principal Deferrals Principal Deferrals [Member] Principal Deferrals [Member] Combination of Rate Reduction and Principal Deferral Combination Of Rate And Maturity [Member] Combination Of Rate And Maturity [Member] Financing Receivable, Troubled Debt Restructuring [Line Items] Financing Receivable, Troubled Debt Restructuring [Line Items] Loans modified as a TDR Financing Receivable, Troubled Debt Restructuring, Postmodification Net deferred tax liabilities Deferred Tax Liabilities, Net Estimated annual effective tax rate Effective Income Tax Rate Reconciliation, Percent AFS - Fair Value Debt Securities, Available-for-sale, Unrealized Gain (Loss) [Abstract] Less than 12 Months Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months 12 Months or More Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer Total Debt Securities, Available-for-sale, Unrealized Loss Position AFS - Unrealized Loss Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract] Less than 12 Months Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 12 Months or More Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Total Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss Subsequent Events [Abstract] Subsequent Events Subsequent Events [Text Block] Fair Value, Recurring and Nonrecurring [Table] Liabilities measured at fair value on a non-recurring basis Financial and Nonfinancial Liabilities, Fair Value Disclosure Mortgage loans on real estate, pending foreclosures Mortgage Loans in Process of Foreclosure, Amount Loans held for sale, at fair value Net of: Loans and Leases Receivable, Net Amount [Abstract] Deferred costs (fees) and discounts, net Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums Allowance for loan losses Total loans held for investment Loans Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Allowances for Loan Losses and Off-Balance Sheet Credit Losses Financing Receivable, Allowance for Credit Loss [Table Text Block] Impaired Loans Impaired Financing Receivables [Table Text Block] Non-Performing (Nonaccrual) Loans Financing Receivable, Nonaccrual [Table Text Block] Outstanding and Recorded Balances of Loans Modified as TDRs Financing Receivable, Troubled Debt Restructuring [Table Text Block] Analysis of Age of Recorded Investment in Loans Financing Receivable, Past Due [Table Text Block] Real Estate and Commercial and Industrial Credit Risk Profile by Internally Assigned Grade Financing Receivable Credit Quality Indicators [Table Text Block] Consumer Credit Exposure Credit Risk Profile Based on Payment Activity Consumer Credit Exposure Credit Risk Profile Based On Payment Activity [Table Text Block] Consumer Credit Exposure Credit Risk Profile Based On Payment Activity [Table Text Block] July 1, 2019 to June 30, 2020 Lessee, Operating Lease, Liability, Payments, Due Next Rolling Twelve Months July 1, 2020 to June 30, 2021 Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Two July 1, 2021 to June 30, 2022 Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Three July 1, 2022 to June 30, 2023 Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Four July 1, 2023 to June 30, 2024 Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Five Thereafter Lessee, Operating Lease, Liability, Payments, Due after Rolling Year Five Total lease payments Lessee, Operating Lease, Liability, Payments, Due Less: Interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Present value of lease liabilities Summary of Net Deferred Tax Assets Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Commitments and Contingent Liabilities Commitments and Contingencies Disclosure [Text Block]