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Duration Trading Arrangement Duration Schedule of Investment Portfolio in Continuous Unrealized Loss Position, Fair Value Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] Entity Address, City or Town Entity Address, City or Town Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Schedule of Segment Reporting Information, by Segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Residential - Home Equity Home Equity Loan [Member] Document Transition Report Document Transition Report Award Timing Predetermined Award Timing Predetermined [Flag] Church Street Capital Church Street Capital [Member] Church Street Capital [Member] Borrowed funds Interest Expense, Borrowings Termination Date Trading Arrangement Termination Date Common stock, shares authorized (in shares) Common Stock, Shares Authorized Construction Construction Loans [Member] 2019 Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year Financing Receivable, Past Due [Table] Financing Receivable, Past Due [Table] Interest Recognized Year to Date Interest Recognized Impaired Financing Receivable, Interest Income, Accrual Method Earned fees Contract With Customer, Liability, Revenue Recognized Excluding Opening Balance Contract With Customer, Liability, Revenue Recognized Excluding Opening Balance Real estate Real estate: Real Estate Loan [Member] Financial Asset, Period Past Due [Axis] Financial Asset, Aging [Axis] 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] Unrealized Gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Derivative Instrument [Axis] Derivative Instrument [Axis] Provision for credit losses Financing Receivable, Credit Loss Expense (Reversal), Net Of Release Of Credit Losses On Unfunded Commitments Financing Receivable, Credit Loss Expense (Reversal), Net Of Release Of Credit Losses On Unfunded Commitments 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] All Trading Arrangements All Trading Arrangements [Member] Substandard Substandard [Member] Within one year Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One All Adjustments to Compensation All Adjustments to Compensation [Member] Award Timing Disclosures [Line Items] Foreclosed real estate expenses (income), net Other Real Estate Expenses, Net Other Real Estate Expenses, Net Compensation Amount Outstanding Recovery Compensation Amount Provision for credit losses on unfunded commitments Unfunded Commitments, Credit Loss, Expense (Reversal) Unfunded Commitments, Credit Loss, Expense (Reversal) Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Additional paid-in capital Additional Paid in Capital Increase (decrease) in valuation of loans held for sale carried at fair value Mortgage Banking And Servicing, Gain (Loss) Mortgage Banking And Servicing, Gain (Loss) Loan processing Loan Processing Fee Credit card fees Credit Card [Member] Over five to ten years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Fair value of interest rate lock commitments Derivative assets Derivative Asset Loans receivable, net Loans Receivable, Fair Value Disclosure Gross Charge-offs Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] Portfolio loans receivable, gross Portfolio loans receivable, gross Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss Deferred income tax (benefit) expense Deferred Income Tax Expense (Benefit) Net proceeds from exercise of stock options Proceeds from Stock Options Exercised Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Residential Real Estate Residential Real Estate [Member] Doubtful Doubtful [Member] Income taxes Income Tax, Policy [Policy Text Block] Municipal Municipal Municipal Municipal Bonds [Member] Insider Trading Arrangements [Line Items] Allowance for credit losses Accounts Receivable, Allowance for Credit Loss Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] Number of other locations Lessee, Operating Lease, Number Of Other Locations Lessee, Operating Lease, Number Of Other Locations Gain on sale of foreclosed real estate Gains (Losses) on Sales of Other Real Estate Total cash and cash equivalents Cash, Cash Equivalents, and Federal Funds Sold Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Other assets Other Assets Shares issued as compensation (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Interest-bearing deposits at other financial institutions Interest-Bearing Deposits in Banks and Other Financial Institutions Entity Registrant Name Entity Registrant Name Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Award Timing Method Award Timing Method [Text Block] Increase in other assets Increase (Decrease) in Other Operating Assets Prior Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year, Writeoff Adjustment to Compensation, Amount Adjustment to Compensation Amount Interest Recognized on Nonaccrual Loans Finance Receivable Interest Recognized On Nonaccrual Loans Finance Receivable Interest Recognized On Nonaccrual Loans Other borrowed funds Other Borrowings ROU assets Net lease asset Operating Lease, Right-Of-Use Asset, Net Operating Lease, Right-Of-Use Asset, Net Document Period End Date Document Period End Date Executive long-term incentive plan expense Increase (Decrease) in Deferred Compensation U.S. Small Business Administration (“SBA”) Payroll Protection Program (“PPP”) loans receivable, net of fees and costs Financing Receivable, Small Business Administration, Paycheck Protection Program, Net Of Fees Financing Receivable, Small Business Administration, Paycheck Protection Program, Net Of Fees Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Schedule of Non-Accrual Loans Financing Receivable, Nonaccrual [Table Text Block] Adoption Date Trading Arrangement Adoption Date Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Entity Central Index Key Entity Central Index Key Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Income tax expense Income Tax Expense (Benefit) Designated as Hedging Instrument Designated as Hedging Instrument [Member] Investment securities available for sale Interest Income, Debt Securities, Available-for-Sale, Operating Fair Value Fair Value Disclosures [Text Block] Pledged securities Securities Loaned, Fair Value of Collateral Name Trading Arrangement, Individual Name Cash and Cash Equivalents [Abstract] Cash and Cash Equivalents [Abstract] Other comprehensive loss Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Provision for credit losses Provision (release of provision) for loan losses Financing Receivable, Credit Loss, Expense (Reversal) AFS, 12 months or longer, Unrealized Losses Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Financial Asset, 60 to 89 Days Past Due Financial Asset, 60 to 89 Days Past Due [Member] Entity [Domain] Entity [Domain] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Deposits Interest Expense, Deposits Amendment Flag Amendment Flag Legal Entity [Axis] Legal Entity [Axis] AFS, Less than 12 months, Unrealized Losses Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Weighted average discount rate Operating Lease, Weighted Average Discount Rate, Percent Interest Interest Paid, Excluding Capitalized Interest, Operating Activities Net interest income Net interest income Interest Income (Expense), Net Financing Receivable, Credit Quality Indicator [Table] Financing Receivable, Credit Quality Indicator [Table] Schedule of Past Due Loans Receivables Financing Receivable, Past Due [Table Text Block] Deferred origination fees, net Financing Receivable, Deferred Commitment Fee Within one year Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Shares repurchased and retired (in shares) Stock Repurchased and Retired During Period, Shares Unused lines of credit Unused Commitments to Extend Credit Savings Deposits Savings Deposits [Member] Savings Deposits [Member] Useful lives Property, Plant and Equipment, Useful Life Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] 2020 Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff Schedule of Impaired Loans Receivables Impaired Financing Receivables [Table Text Block] Total Recorded Investment Individually evaluated loans for credit loss, net Impaired Financing Receivable, Recorded Investment Proceeds from sales of loans held for sale Proceeds from Sale, Loan, Held-for-Sale Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Total interest income Interest income Interest and Dividend Income, Operating 2021 Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year Gross Charge-offs Charge Offs [Member] Charge Offs Company Selected Measure Amount Company Selected Measure Amount Restricted investments Restricted Investments, at Fair Value Additional Paid-in Capital Additional Paid-in Capital [Member] Loans 30-59 Days Past Due Financial Asset, 30 to 59 Days Past Due [Member] Total assets Total assets Assets Name Awards Close in Time to MNPI Disclosures, Individual Name Revision of Prior Period [Axis] Revision of Prior Period [Axis] Cover [Abstract] Cover [Abstract] Mortgage Loans Sold Mortgage Loans Sold [Member] Mortgage Loans Sold [Member] Financing receivable, troubled debt restructuring Financing Receivable, Modified, Accumulated Allowance for Loan Losses Ending Balance Evaluated for Impairment: Collectively Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment Stock-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Fair Value, Measurements, Recurring Fair Value, Recurring [Member] Salaries and employee benefits Labor and Related Expense Dividends paid Payments of Dividends Non-NEOs Non-NEOs [Member] Total future lease payments Lessee, Operating Lease, Liability, to be Paid 2019 Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff Recorded Investment With No Allowance Impaired Financing Receivable, with No Related Allowance, Recorded Investment Segments Segment Reporting Disclosure [Text Block] Cash and Cash Equivalents Cash and Cash Equivalents Disclosure [Text Block] Net increase (decrease) in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash flows from financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Construction Construction Portfolio Segment [Member] Construction Portfolio Segment [Member] Non-PEO NEO Non-PEO NEO [Member] Equity Component [Domain] Equity Component [Domain] Adjustment to Compensation: Adjustment to Compensation [Axis] Noninterest income Noninterest Income, Other Bank owned life insurance Bank Owned Life Insurance Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Unpaid Contractual Principal Balance Impaired Financing Receivable, Unpaid Principal Balance Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Entity Current Reporting Status Entity Current Reporting Status Fixed interest rate term Financing Receivable, Fixed Interest Rate Term Financing Receivable, Fixed Interest Rate Term Reclassifications Reclassification, Comparability Adjustment [Policy Text Block] Recorded Investment With Allowance Impaired Financing Receivable, with Related Allowance, Recorded Investment Nonaccrual with No Allowance for Credit Loss Financing Receivable, Nonaccrual, No Allowance Provision (Release of Provision) for Credit Losses Provision for (reversal of) reserve for unfunded commitments Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) 2027 and thereafter Lessee, Operating Lease, Liability, to be Paid, Year Three And Thereafter Lessee, Operating Lease, Liability, to be Paid, Year Three And Thereafter Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Segments [Axis] Segments [Axis] Statement [Line Items] Statement [Line Items] Mortgage banking revenue Mortgage Banking [Member] Aggregate fair value Fair Value Estimate of Fair Value Measurement [Member] Increase in allowance for credit loss Other Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Other Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Other Premises and equipment Property, Plant and Equipment, Policy [Policy Text Block] Schedule of Derivative Instruments Schedule of Derivative Instruments [Table Text Block] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Mortgage-backed securities Mortgage-backed securities Mortgage-backed securities Collateralized Mortgage-Backed Securities [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Fiscal Year Maturity [Abstract] Accounting Standards Update 2016-13 [Member]