Income Statement [Abstract] Interest and Dividend Income Interest and Dividend Income, Operating [Abstract] Interest and fees on loans Interest and Fee Income, Loans and Leases Interest on deposits in banks Interest Income, Deposits with Financial Institutions Interest and dividends on securities: Interest and Dividend Income, Securities, by Classification [Abstract] Taxable interest Interest Income, Securities, Operating, Taxable Tax-exempt interest Interest Income, Securities, Operating, Tax Exempt Dividends Dividend Income, Operating Total interest and dividend income Interest and Dividend Income, Operating Interest Expense Interest Expense [Abstract] Interest on deposits Interest Expense, Deposits Interest on subordinated debt Interest Expense, Subordinated Notes and Debentures Interest on junior subordinated debt Interest Expense, Junior Subordinated Debentures Total interest expense Interest Expense Net interest income Interest Income (Expense), Net Provision for loan losses Provision for Loan and Lease Losses Net interest income after provision for loan losses Interest Income (Expense), after Provision for Loan Loss Noninterest Income Noninterest Income [Abstract] Service charges on deposit accounts Fees and Commissions, Depositor Accounts ATM and check card fees ATM And Check Card Fees ATM and check card fees. Wealth management fees Fees and Commissions Fees for other customer services Fees and Commissions, Other Income from bank owned life insurance Bank Owned Life Insurance Income Net gains on sale of loans Gain (Loss) on Sales of Loans, Net Other operating income Noninterest Income, Other Operating Income Total noninterest income Noninterest Income Noninterest Expense Noninterest Expense [Abstract] Salaries and employee benefits Labor and Related Expense Occupancy Occupancy, Net Equipment Equipment Expense Marketing Marketing Expense Supplies Supplies Expense Legal and professional fees Professional Fees ATM and check card expense ATM And Check Card Fees Expenses ATM and check card fees. FDIC assessment Federal Deposit Insurance Corporation Premium Expense Bank franchise tax Bank Franchise Tax Bank franchise tax. Telecommunications expense Communication Data processing expense Information Technology and Data Processing Postage expense Postage Expense Amortization expense Amortization of Intangible Assets Other real estate owned (income) expense, net Other Real Estate Owned Income (Expense), Net Other Real Estate Owned Income (Expense), Net Other operating expense Other Noninterest Expense Total noninterest expense Noninterest Expense Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income tax expense Income Tax Expense (Benefit) Net income Net Income (Loss) Attributable to Parent Earnings per common share Earnings Per Share [Abstract] Basic (in usd per share) Earnings Per Share, Basic Diluted (in usd per share) Earnings Per Share, Diluted Investments, Debt and Equity Securities [Abstract] Summary of Amortized Costs and Fair Values of Securities Schedule Of Available For Sale And Held To Maturity Reconciliation [Table Text Block] Schedule Of Available For Sale And Held To Maturity Reconciliation [Table Text Block] Summary of Investments in an Unrealized Loss Position that were Temporarily Impaired Schedule of Temporary Impairment Losses, Investments [Table Text Block] Amortized Cost and Fair Value of Securities Investments Classified by Contractual Maturity Date [Table Text Block] Composition of Restricted Securities Marketable Securities [Table Text Block] Real Estate [Abstract] Summary of Changes in the Balance for OREO Real Estate Investment Financial Statements, Disclosure [Table Text Block] Equity [Abstract] Schedule of Changes in Component of Accumulated Other Comprehensive Loss Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Retirement Benefits [Abstract] Schedule of Defined Benefit Plans Disclosures [Table] Schedule of Defined Benefit Plans Disclosures [Table] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Minimum eligibility for full-time employees, age Defined Benefit Pension Plan Minimum Eligible Age Of Employee Defined benefit pension plan minimum eligible age of employee. Period of service credit by employee Period Of Service Credit By Employee Period of service credit by employee. Number of highest-paid consecutive years for benefits Number Of Highest Paid Consecutive Periods Of Service For Calculation Of Average Compensation Related To Benefits Number of highest paid consecutive periods of service for calculation of average compensation related to benefits. Amount contributed to pension plan Defined Benefit Plan, Plan Assets, Contributions by Employer Statement of Comprehensive Income [Abstract] Net income Other comprehensive (loss) income, net of tax, Other Comprehensive Income (Loss), Net of Tax [Abstract] Unrealized holding (losses) gains on available for sale securities, net of tax Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Pension liability adjustment, net of tax Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax Total other comprehensive (loss) income Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Total comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Receivables [Abstract] Schedule of Financing Receivables Past Due [Table] Schedule of Financing Receivables Past Due [Table] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Real estate loans Real Estate Portfolio Segment [Member] Real Estate Portfolio Segment [Member] Commercial and industrial loans Commercial And Industrial Portfolio Segment [Member] Commerial and Industrial Portfolio Segment [Member] Consumer and other loans Consumer Portfolio Segment [Member] Financing Receivables, Period Past Due [Axis] Financing Receivables, Period Past Due [Axis] Financing Receivables, Period Past Due [Domain] Financing Receivables, Period Past Due [Domain] 30-59 Days Past Due Financing Receivables, 30 to 59 Days Past Due [Member] 60-89 Days Past Due Financing Receivables, 60 to 89 Days Past Due [Member] 90 Days Past Due Financing Receivables, Equal to Greater than 90 Days Past Due [Member] Class of Financing Receivable, Type [Axis] Class of Financing Receivable, Type [Axis] Class of Financing Receivable, Type [Domain] Class of Financing Receivable, Type [Domain] Construction and land development Construction And Land Development [Member] Construction And Land Development [Member] Secured by 1-4 family residential Residential One Through Four Family [Member] Residential one through four family. Other real estate loans Other Real Estate Loans [Member] Other real estate loans. Financing Receivable, Recorded Investment, Past Due [Line Items] Financing Receivable, Recorded Investment, Past Due [Line Items] Total Past Due Financing Receivable, Recorded Investment, Past Due Current Financing Receivable, Recorded Investment, Current Total Loans Loans and Leases Receivable, Gross Non-accrual Loans Financing Receivable, Recorded Investment, Nonaccrual Status 90 Days or More Past Due and Accruing Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing Allowance by Impairment Methodology and Loans by Impairment Methodology Allowance For Credit Losses On Financing Receivables Classification [Table Text Block] Allowance for credit losses on financing receivables classification. Impaired Loans and Related Allowance Impaired Loans And Related Allowance [Table Text Block] Impaired loans and the related allowance. Other Real Estate [Table] Other Real Estate [Table] Other Real Estate [Table] Real Estate, Type of Property [Axis] Real Estate, Type of Property [Axis] Real Estate [Domain] Real Estate [Domain] Residential real estate properties Apartment Building [Member] Other Real Estate [Line Items] Other Real Estate [Line Items] Other Real Estate [Line Items] Residential real estate carrying amount included in OREO Other Real Estate Mortgage loans foreclosed Mortgage Loans on Real Estate, Foreclosures Net expenses applicable to other real estate owned Other Real Estate Owned Expenses Other real estate owned expenses. Other Liabilities and Financial Instruments Subject to Mandatory Redemption [Abstract] Junior Subordinated Debt Debt Disclosure [Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] 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] Equity Award [Domain] Equity Award [Domain] 2014 Stock Incentive Plan Stock Compensation Plan [Member] Restricted stock units Restricted Stock Units (RSUs) [Member] Vesting [Axis] Vesting [Axis] Vesting [Domain] Vesting [Domain] Vesting immediately Share-based Compensation Award, Tranche One [Member] Vesting within one year Share-based Compensation Award, Tranche Three [Member] Vesting within two years Share-based Compensation Award, Tranche Two [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 available for grant (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Stock-based compensation expense related to stock awards Allocated Share-based Compensation Expense Restricted stock units, granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Restricted stock units, vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Restricted stock units, nonvested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Percentage of units vesting Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Total unrecognized pre-tax compensation expense related to unvested restricted stock unit awards Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options Stock-based compensation Share-based Compensation Fair Value Disclosures [Abstract] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Recurring basis Fair Value, Measurements, Recurring [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [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] Significant Unobservable Inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Investment Type [Axis] Investment Type [Axis] Investments [Domain] Investments [Domain] U.S. agency and mortgage-backed securities Us Agency And Mortgage Backed Securities [Member] U.S. agency and mortgage backed securities. Obligations of states and political subdivisions Municipal Bonds [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] Fair Value Available-for-sale Securities Brokers and Dealers [Abstract] Subordinated Debt Subordinated Borrowings Disclosure [Text Block] Fair Value Measurements Fair Value Disclosures [Text Block] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Net Unrealized Gains (Losses) on Securities Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] Adjustments Related to Pension Benefits Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] AOCI Attributable to Parent, Net of Tax [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] Beginning Balance Stockholders' Equity Attributable to Parent Unrealized holding (losses) gains, net of tax Pension liability adjustment, net of tax Change during period Ending Balance Unrealized holding gains, tax Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax Pension liability adjustment, tax Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax Reclassification from AOCI current period, net of tax Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Corporate debt securities Corporate Debt Securities [Member] Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Securities available for sale: Available-for-sale Securities [Abstract] Less than 12 months - Fair value Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value Less than 12 months - Unrealized (loss) Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 12 months or more - Fair value Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 12 months or more - Unrealized (loss) Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value Unrealized (Loss) Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax Securities held to maturity: Held-to-maturity Securities [Abstract] Less than 12 months - Fair value Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value Less than 12 months - Unrealized (loss) Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 12 months or more - Fair value Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 12 months or more - Unrealized (loss) Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Fair Value Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value Unrealized (Loss) Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss Total securities, Less than 12 months - Fair value Available for Sale Securities and Held to Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value Available for Sale Securities and Held to Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value Total securities, Less than 12 months - Unrealized (loss) Available For Sale Securities And Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Accumulated Loss Available for sale securities and held to maturity securities continuous unrealized loss position less than twelve months accumulated loss. Total securities, 12 months or more - Fair value Available for Sale Securities and Held to Maturity Securities Continuous Unrealized Loss Position Twelve Months or Longer Fair Value Available for Sale Securities and Held to Maturity Securities Continuous Unrealized Loss Position Twelve Months or Longer Fair Value Total securities, 12 months or more - Unrealized (loss) Available For Sale Securities And Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Accumulated Loss Available for sale securities and held to maturity securities continuous unrealized loss position twelve months or longer accumulated loss. Total securities, Total fair value Available for Sale Securities and Held to Maturity Securities Continuous Unrealized Loss Position Fair Value Available for Sale Securities and Held to Maturity Securities Continuous Unrealized Loss Position Fair Value Total unrealized (loss) Available For Sale Securities And Held To Maturity Securities Continuous Unrealized Loss Position Accumulated Loss Available for sale securities and held to maturity securities continuous unrealized loss position accumulated loss. Schedule Of Available For Sale And Held To Maturity Securities [Table] Schedule Of Available For Sale And Held To Maturity Securities [Table] Schedule Of Available For Sale And Held To Maturity Securities [Table] Schedule Of Available For Sale And Held To Maturity Securities [Line Items] Schedule Of Available For Sale And Held To Maturity Securities [Line Items] Schedule Of Available For Sale And Held To Maturity Securities [Line Items] Amortized Cost Available-for-sale Debt Securities, Amortized Cost Basis Gross Unrealized Gains Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax Gross Unrealized (Losses) Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax Fair Value Available-for-sale Securities, Debt Securities Amortized Cost Held-to-maturity Securities, Amortized Cost before Other than Temporary Impairment Gross Unrealized Gains Held-to-maturity Securities, Accumulated Unrecognized Holding Gain Gross Unrealized (Losses) Held-to-maturity Securities, Accumulated Unrecognized Holding Loss Fair Value Held-to-maturity Securities, Fair Value Total securities, Amortized cost Available For Sale Securities And Held To Maturity Securities Amortized Cost Available For Sale Securities And Held To Maturity Securities Amortized Cost Total securities, Gross unrealized gains Available For Sale Securities And Held To Maturity Securities Accumulated Gross Unrealized Gain Available for sale securities and held to maturity securities accumulated gross unrealized gain. Total securities, Gross unrealized (losses) Available For Sale And Held To Maturity Securities Accumulated Gross Unrealized Loss Available for sale and held to maturity securities accumulated gross unrealized loss. Total securities, Fair value Available-for-sale Securities and Held-to-maturity Securities Balances of Assets Measured at Fair Value on a Recurring Basis Fair Value, Assets Measured on Recurring Basis [Table Text Block] Summary of Assets Measured at Fair Value on a Nonrecurring Basis Fair Value Measurements, Nonrecurring [Table Text Block] Quantitative Information about Level 3 Fair Value Measurements Fair Value Inputs, Assets, Quantitative Information [Table Text Block] Carrying Values and Estimated Fair Values of Company's Financial Instruments Fair Value, by Balance Sheet Grouping [Table Text Block] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Unvested, beginning of year (in shares) Granted (in shares) Vested (in shares) Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Unvested, end of period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Unvested, beginning of year (in usd 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 usd 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 Vested (in usd 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 (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Unvested, end of period (in usd per share) Regulatory Capital Requirements [Abstract] Comparison of Capital of Company and Bank with Minimum Regulatory Guidelines Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block] Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table] Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table] Products and Services [Axis] Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] Demand deposit overdrafts Demand Deposit Overdrafts [Member] Demand deposit overdrafts. Financing Receivable, Recorded Investment [Line Items] Financing Receivable, Recorded Investment [Line Items] Net deferred loan fees and costs Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums Total Loans Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] FHLB Federal Home Loan Bank Advances [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Unused lines of credit Line of Credit Facility, Remaining Borrowing Capacity Blanket floating lien agreement Percentage Of Assets For Maximum Borrowing Percentage of assets for maximum borrowing. Collateral pledged on borrowings including real estate loans Loans Pledged as Collateral FHLB stock book value Federal Home Loan Bank Stock Borrowings from FHLB Advances from Federal Home Loan Banks Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Preferred Stock Preferred Stock [Member] Common Stock Common Stock [Member] Surplus Additional Paid-in Capital [Member] Retained Earnings Retained Earnings [Member] Statement [Line Items] Statement [Line Items] Other comprehensive income (loss) Cash dividends on common stock Dividends, Common Stock, Cash Stock-based compensation Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Issuance of common stock, dividend reinvestment plan Stock Issued During Period, Value, Dividend Reinvestment Plan Issuance of common stock, stock incentive plan Stock Issued During Period, Value, Share-based Compensation, Gross Repurchase of common stock, stock incentive plan Stock Repurchased During Period, Value Numerator [Abstract] Numerator [Abstract] Denominator [Abstract] Denominator [Abstract] Weighted average shares outstanding – basic (in shares) Weighted Average Number of Shares Outstanding, Basic Potentially dilutive common shares – restricted stock units (in shares) Weighted Average Number of Shares, Restricted Stock Weighted average shares outstanding – diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Available for Sale Amortized Cost Available-for-sale Securities, Amortized Cost Basis [Abstract] Due within one year Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis Due after one year through five years Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis Due after five years through ten years Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis Due after ten years Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis Amortized Cost Available-for-sale Securities, Amortized Cost Basis Fair Value Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract] Due within one year Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value Due after one year through five years Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value Due after five years through ten years Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value Due after ten years Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value Fair Value Held to Maturity Amortized Cost Held-to-maturity Securities, Debt Maturities, Amortized Cost, Rolling Maturity [Abstract] Due within one year Held-to-maturity Securities, Debt Maturities, within One Year, Net Carrying Amount Due after one year through five years Held-to-maturity Securities, Debt Maturities, after One Through Five Years, Net Carrying Amount Due after five years through ten years Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount Due after ten years Held-to-maturity Securities, Debt Maturities, after Ten Years, Net Carrying Amount Amortized Cost Held-to-maturity Securities Fair Value Held-to-maturity Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] Due within one year Held-to-maturity Securities, Debt Maturities, Next Twelve Months, Fair Value Due after one year through five years Held-to-maturity Securities, Debt Maturities, Year Two Through Five, Fair Value Due after five years through ten years Held-to-maturity Securities, Debt Maturities, Year Six Through Ten, Fair Value Due after ten years Held-to-maturity Securities, Debt Maturities, after Ten Years, Fair Value 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] Depreciation and amortization of premises and equipment Depreciation, Depletion and Amortization, Nonproduction Amortization of core deposit intangibles Amortization of debt issuance costs Amortization of Debt Issuance Costs Origination of loans held for sale Payments for Origination and Purchases of Loans Held-for-sale Proceeds from sale of loans held for sale Proceeds from Sale of Loans Held-for-sale Net gains on sales of loans held for sale Net gains on sale of other real estate owned Gains (Losses) on Sales of Other Real Estate Increase in cash value of bank owned life insurance Life Insurance, Corporate or Bank Owned, Change in Value Accretion of discounts and amortization of premiums on securities, net Accretion (Amortization) of Discounts and Premiums, Investments Accretion of premium on time deposits Accretion Amortization Of Discounts And Premium On Time Deposits Accretion amortization of discounts and premium on time deposits. Excess tax benefits on stock-based compensation Excess Tax Benefit from Share-based Compensation, Operating Activities Deferred income tax expense (benefit) Deferred Income Tax Expense (Benefit) Changes in assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Decrease (increase) in interest receivable Increase (Decrease) in Accrued Interest Receivable, Net Decrease in other assets Increase (Decrease) in Other Operating Assets (Decrease) increase in accrued expenses and other liabilities Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations Cash Flows from Investing Activities Net Cash Provided by (Used in) Investing Activities [Abstract] Proceeds from maturities, calls, and principal payments of securities available for sale Proceeds from Sale and Maturity of Available-for-sale Securities Proceeds from maturities, calls, and principal payments of securities held to maturity Proceeds from Sale and Maturity of Held-to-maturity Securities Purchases of securities available for sale Payments to Acquire Available-for-sale Securities Net purchase of restricted securities Payments to Acquire Restricted Investments Purchase of premises and equipment Payments to Acquire Productive Assets Proceeds from sale of other real estate owned Proceeds from Sale of Other Real Estate Proceeds from cash value of bank owned life insurance Proceeds from Life Insurance Policy Net decrease (increase) in loans Payments for (Proceeds from) Loans and Leases Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations Cash Flows from Financing Activities Net Cash Provided by (Used in) Financing Activities [Abstract] Net increase in demand deposits and savings accounts Increase (Decrease) in Deposits Net increase (decrease) in time deposits Increase (Decrease) in Time Deposits Cash dividends paid on common stock, net of reinvestment Payments of Ordinary Dividends, Common Stock Repurchase of common stock Payments for Repurchase of Common Stock Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations Increase in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and Cash Equivalents Cash and Cash Equivalents [Abstract] Cash and cash equivalents, beginning of year Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents, end of year Supplemental Disclosures of Cash Flow Information Supplemental Cash Flow Information [Abstract] Cash payments for: Cash Payments [Abstract] Cash payments. Interest Interest Paid Supplemental Disclosures of Noncash Investing and Financing Activities Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Unrealized (losses) gains on securities available for sale Available-for-sale Securities, Change in Net Unrealized Holding Gain (Loss), Net of Tax Change in pension liability Increase (Decrease) in Obligation, Pension Benefits Issuance of common stock, dividend reinvestment plan Proceeds from Issuance of Common Stock, Dividend Reinvestment Plan Unrealized holding gains on available for sale securities, tax Components of Net Periodic Benefit Cost Schedule of Net Benefit Costs [Table Text Block] Statement of Financial Position [Abstract] Assets Assets [Abstract] Cash and due from banks Cash and Due from Banks Interest-bearing deposits in banks Interest-bearing Deposits in Banks and Other Financial Institutions Securities available for sale, at fair value Securities held to maturity, at amortized cost Restricted securities, at cost Restricted Investments Loans held for sale Loans Receivable Held-for-sale, Net, Not Part of Disposal Group Loans, net of allowance for loan losses Loans and Leases Receivable, Net Amount Other real estate owned, net of valuation allowance Other Real Estate, Foreclosed Assets, and Repossessed Assets Premises and equipment, net Property, Plant and Equipment, Net Accrued interest receivable Interest Receivable Bank owned life insurance Bank Owned Life Insurance Core deposit intangibles, net Core Deposit Intangible, Net Core deposit intangible, net. Other assets Other Assets Total assets Assets Liabilities and Shareholders’ Equity Liabilities and Equity [Abstract] Liabilities Liabilities [Abstract] Deposits: Deposits [Abstract] Noninterest-bearing demand deposits Noninterest-bearing Deposit Liabilities Savings and interest-bearing demand deposits Deposits, Savings Deposits Time deposits Time Deposits Total deposits Deposits Subordinated debt Subordinated Debt Junior subordinated debt Junior Subordinated Notes Accrued interest payable and other liabilities Other Liabilities Total liabilities Liabilities Shareholders’ Equity Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, par value Preferred Stock, Value, Issued Common stock, par value Common Stock, Value, Issued Surplus Additional Paid in Capital Retained earnings Retained Earnings (Accumulated Deficit) Accumulated other comprehensive loss, net Accumulated Other Comprehensive Income (Loss), Net of Tax Total shareholders’ equity Total liabilities and shareholders’ equity Liabilities and Equity Capital Requirements Regulatory Capital Requirements under Banking Regulations [Text Block] Computation of Basic and Diluted Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Fair Value Inputs, Assets, Quantitative Information [Table] Fair Value Inputs, Assets, Quantitative Information [Table] Nonrecurring basis Fair Value, Measurements, Nonrecurring [Member] Asset Class [Axis] Asset Class [Axis] Asset Class [Domain] Asset Class [Domain] Other real estate owned Other Real Estate Owned Net [Member] Other Real Estate Owned Net [Member] Fair Value Inputs, Assets, Quantitative Information [Line Items] Fair Value Inputs, Assets, Quantitative Information [Line Items] Fair Value Assets, Fair Value Disclosure Range (Weighted-Average) Fair Value Inputs, Discount Rate Actual amount total capital (to risk weighted assets) Capital Actual ratio total capital (to risk weighted assets) Capital to Risk Weighted Assets Minimum capital requirement amount total capital (to risk weighted assets) Capital Required for Capital Adequacy Minimum capital requirement ratio total capital (to risk weighted assets) Capital Required for Capital Adequacy to Risk Weighted Assets Minimum to be well capitalized under prompt corrective action provisions amount total capital (to risk weighted assets) Capital Required to be Well Capitalized Minimum to be well capitalized under prompt corrective action provisions ratio total capital (to risk weighted assets) Capital Required to be Well Capitalized to Risk Weighted Assets Actual amount Tier 1 capital (to risk weighted assets) Tier One Risk Based Capital Actual ratio Tier 1 capital (to risk weighted assets) Tier One Risk Based Capital to Risk Weighted Assets Minimum capital requirement amount Tier 1 capital (to risk weighted assets) Tier One Risk Based Capital Required for Capital Adequacy Minimum capital requirement ratio Tier 1 capital (to risk weighted assets) Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets Minimum to be well capitalized under prompt corrective action provisions amount Tier 1 capital (to risk weighted assets) Tier One Risk Based Capital Required to be Well Capitalized Minimum to be well capitalized under prompt corrective action provisions ratio Tier 1 capital (to risk weighted assets) Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets Actual amount common equity Tier 1 capital (to risk weighted assets) Common Equity Tier One Risk Based Capital Common Equity Tier One Risk Based Capital Actual ratio common equity Tier 1 capital (to risk weighted assets) Common Equity Tier One Risk Based Capital To Risk Weighted Assets Common Equity Tier One Risk Based Capital To Risk Weighted Assets Minimum capital requirement amount common equity Tier 1 capital (to risk weighted assets) Common Equity Tier One Risk Based Capital Required For Capital Adequacy Common Equity Tier One Risk Based Capital Required For Capital Adequacy Minimum capital requirement ratio common equity Tier 1 capital (to risk weighted assets) Common Equity Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Common Equity Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Minimum to be well capitalized under prompt corrective action provisions amount common equity Tier 1 capital (to risk weighted assets) Common Equity Tier One Risk Based Capital Required To Be Well Capitalized Common Equity Tier One Risk Based Capital Required To Be Well Capitalized Minimum to be well capitalized under prompt corrective action provisions ratio common equity Tier 1 capital (to risk weighted assets) Common Equity Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets Common Equity Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets Actual amount Tier 1 capital (to average assets) Tier One Leverage Capital Actual ratio Tier 1 capital (to average assets) Tier One Leverage Capital to Average Assets Minimum capital requirement amount Tier 1 capital (to average assets) Tier One Leverage Capital Required for Capital Adequacy Minimum capital requirement ratio Tier 1 capital (to average assets) Tier One Leverage Capital Required for Capital Adequacy to Average Assets Minimum to be well capitalized under prompt corrective action provisions amount Tier 1 capital (to average assets) Tier One Leverage Capital Required to be Well Capitalized Minimum to be well capitalized under prompt corrective action provisions ratio Tier 1 capital (to average assets) Tier One Leverage Capital Required to be Well Capitalized to Average Assets Stock Compensation Plans Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Real estate loans: Loans and Leases Receivable, Net Amount [Abstract] Loans Allowance for loan losses Loans and Leases Receivable, Allowance Loans, net Cash dividends on common stock, per share (in usd per share) Common Stock, Dividends, Per Share, Declared Issuance of common stock dividend reinvestment plan, shares (in shares) Stock Issued During Period, Shares, Dividend Reinvestment Plan Issuance of common stock incentive plan, shares (in shares) Stock Issued During Period, Shares, Share-based Compensation, Gross Repurchase of common stock incentive plan, shares (in shares) Stock Repurchased During Period, Shares Other real estate owned Document And Entity Information [Abstract] Document and entity information. Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol 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 Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Maximum Maximum [Member] Loans held for sale Loans Held For Sale [Member] Loans held for sale [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Non recurring fair value adjustments on loans held for sale Assets, Fair Value Adjustment Period under consideration for valuation of real estate collateral Period Used To Determine Value Of Real Estate Collateral Maximum period used to determine value of real estate collateral. Period under consideration for valuation of house or building in the process of construction Period Of Appraisal Of Property To Consider Different Method To Measure Fair Value Period of appraisal of property to consider different method to measure fair value. Period under consideration for valuation of business equipment Period Used To Determine Value Of Business Equipment Period used to determine value of business equipment. Interest cost Defined Benefit Plan, Interest Cost Expected return on plan assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Net periodic benefit cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Allowance For Loan Losses [Table] Allowance For Loan Losses [Table] Allowance For Loan Losses [Table] Financial Instrument Performance Status [Axis] Financial Instrument Performance Status [Axis] Financial Instrument Performance Status [Domain] Financial Instrument Performance Status [Domain] Performing financing receivable Performing Financial Instruments [Member] Allowance For Loan Losses [Line Items] Allowance For Loan Losses [Line Items] Allowance For Loan Losses [Line Items] TDRs performing under the restructured terms Financing Receivable, Modifications, Recorded Investment Loans modified under TDRs Financing Receivable, Modifications, Number of Contracts Troubled debt restructuring loan subsequent default Financing Receivable, Modifications, Subsequent Default, Recorded Investment Troubled debt restructuring loan subsequent default period Financing Receivable Modification As Troubled Debt Restructuring That Subsequently Defaulted Financing receivable modification as troubled debt restructuring that subsequently defaulted. Balance at the beginning of year, gross Transfers in Other Real Estate, Additions Charge-offs Other Real Estate Charge Off Other real estate charge off. Sales proceeds Other Real Estate, Disposals Gain on disposition Other Real Estate Gross Gains Other real estate gross gains. Balance at the end of period, gross Less: valuation allowance Other Real Estate, Valuation Adjustments Balance at the end of period, net Accounting Policies [Abstract] General Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Schedule of Impaired Financing Receivable [Table] Schedule of Impaired Financing Receivable [Table] Construction and Land Development Secured by 1-4 Family Residential Financing Receivable, Impaired [Line Items] Financing Receivable, Impaired [Line Items] Unpaid 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 Financing Receivable, Individually Evaluated for Impairment Related Allowance Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment Average Recorded Investment Impaired Financing Receivable, Average Recorded Investment Interest Income Recognized Impaired Financing Receivable, Interest Income, Accrual Method Summary of Restricted Stock Units Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] Accumulated Other Comprehensive Loss Comprehensive Income (Loss) Note [Text Block] 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] Other Borrowings Other Borrowings [Text Block] Other borrowings. Schedule of Financial Instruments Subject to Mandatory Redemption [Table] Schedule of Financial Instruments Subject to Mandatory Redemption [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] First National (VA) Statutory Trust II First National Va Statutory Trust Two [Member] First National (VA) Statutory Trust II. First National (VA) Statutory Trust III First National Va Statutory Trust Three [Member] First National (VA) Statutory Trust III. Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items] Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items] Issuance of trust preferred securities Proceeds from Issuance of Trust Preferred Securities LIBOR-indexed floating rate of interest Debt Instrument, Interest Rate, Effective Percentage Junior subordinated debt Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust Maximum capital required for capital adequacy Maximum Capital Required For Capital Adequacy Maximum capital required for capital adequacy. Schedule of Financing Receivable, Allowance for Credit Losses [Table] Schedule of Financing Receivable, Allowance for Credit Losses [Table] Other Real Estate Financing Receivable, Allowance for Credit Losses [Line Items] Financing Receivable, Allowance for Credit Losses [Line Items] Allowance for loan losses: Allowance for Loan and Lease Losses [Roll Forward] Beginning Balance Charge-offs Allowance for Loan and Lease Losses, Write-offs Recoveries Allowance for Loan and Lease Loss, Recovery of Bad Debts Provision for (recovery of) loan losses Ending Balance Ending Balance: Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract] Allowance for loan losses, Individually evaluated for impairment Allowance for loan losses, Collectively evaluated for impairment Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment Loans: Financing Receivable Loans And Leases Receivable [Abstract] Financing receivable loans and leases receivable. Losses, Individually evaluated for impairment Losses, Collectively evaluated for impairment Financing Receivable, Collectively Evaluated for Impairment Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Fair Value Measurement and Disclosures Fair Value Measurement, Policy [Policy Text Block] Federal Home Loan Bank stock Federal Reserve Bank stock Federal Reserve Bank Stock Community Bankers’ Bank stock Community Bankers Bank Stock Community bankers bank stock. Total restricted securities Securities held to maturity, at fair value Allowance for loan losses Other real estate owned, valuation allowance Real Estate Owned, Valuation Allowance Preferred stock, par value (in usd 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 Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Common stock, par value (in usd per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized (in shares) Common Stock, Shares Authorized Common stock, shares issued (in shares) Common Stock, Shares, Issued Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Other Real Estate Owned (OREO) Real Estate Owned [Text Block] Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table] Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Scenario, Forecast Scenario, Forecast [Member] Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] Capital conservation buffer period Capital Conservation Buffer Phase Period Capital conservation buffer phase period. Capital conservation buffer percentage Capital Conservation Buffer Percentage Capital conservation buffer percentage. Capital conservation buffer percentage maintained at bank Capital Conservation Buffer Percentage Maintained At Bank Capital conservation buffer percentage maintained at bank. Number of securities in an unrealized loss position Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions Total number of securities Available For Sale Securities Number Of Securities Available For Sale Securities Number Of Securities Percentage of investment portfolio Percentage Of Investment Portfolio Percentage of investment portfolio. Weighted-average period of re-pricing of portfolio Weighted Average Period Of Pricing Of Portfolio Weighted average period of pricing of portfolio. Impairment recognized Impairment Losses Related To Federal Home Loan Stock Impairment losses related to federal home loan stock. Measurement Basis [Axis] Measurement Basis [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Carrying Amount Reported Value Measurement [Member] Fair Value Estimate of Fair Value Measurement [Member] Financial Assets Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Cash and short-term investments Cash and Cash Equivalents, Fair Value Disclosure Securities held to maturity Restricted securities Loans held for sale Loans Held-for-sale, Fair Value Disclosure Loans, net Loans Receivable, Fair Value Disclosure Financial Liabilities Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Deposits Deposits, Fair Value Disclosure Subordinated debt Subordinated Debt Fair Value Disclosure Subordinated debt fair value disclosure. Junior subordinated debt Subordinated Debt Obligations, Fair Value Disclosure Accrued interest payable Accrued Liabilities, Fair Value Disclosure Summary of Loans Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Summary of Loan Classes and an Aging of Past Due Loans Past Due Financing Receivables [Table Text Block] Analysis of the Credit Risk Profile of Each Loan Class Financing Receivable Credit Quality Indicators [Table Text Block] Securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Allowance for Loan Losses Allowance for Credit Losses [Text Block] Earnings per Common Share Earnings Per Share [Text Block] Benefit Plans Pension and Other Postretirement Benefits Disclosure [Text Block] Loans Loans, Notes, Trade and Other Receivables, Excluding Allowance for Credit Losses [Text Block] Subordinated Borrowing [Table] Subordinated Borrowing [Table] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] 6.75% fixed interest subordinate term note Six Point Seven Five Percentage Fixed Interest Subordinate Term Note [Member] 6.75% Fixed Interest Subordinate Term Note [Member] Subordinated Borrowing [Line Items] Subordinated Borrowing [Line Items] Aggregate principal amount Debt Instrument, Face Amount Fixed interest rate Debt Instrument, Interest Rate, Stated Percentage Unamortized debt issuance costs Unamortized Debt Issuance Expense