Investments, Debt and Equity Securities [Abstract] Trust Preferred Securities [Abstract] Trust Preferred Securities [Abstract] Trust Preferred Securities [Abstract] Writedown Carry Amount Pooled Trust Preferred Securities Recognized In Earnings Writedown Carry Amount Pooled Trust Preferred Securities Recognized In Earnings The amount of write-down of TRUP securities as Available-for-sale which have been recognized in earnings during the period. Trust Preferred Securities, Amortized Cost Trust Preferred Securities Amortized Cost This item represents the cost of Trust Preferred debt securities. Available for sale securities, TRUPS, Net Realized Gain (Loss) on Sale Available for sale securities, TRUPS, Net Realized Gain (Loss) on Sale The realized gain/loss on sale of available for sale Trust Preferred Securities. Available-for-sale Securities, Gross Realized Gain (Loss) [Abstract] Available-for-sale Securities, Gross Realized Gain (Loss) [Abstract] Available-for-sale Securities, Gross Realized Gain (Loss) Available-for-sale Securities, Gross Realized Gain (Loss) Available-for-sale Securities, Gross Realized Gains Available-for-sale Securities, Gross Realized Gains Available-for-sale Securities, Gross Realized Losses Available-for-sale Securities, Gross Realized Losses Held-to-maturity Securities, Other Disclosure Items [Abstract] Held-to-maturity Securities, Other Disclosure Items [Abstract] Proceeds from sale of held-to-maturity securities Proceeds from Sale of Held-to-maturity Securities Pledged Financial Instruments, Not Separately Reported, Securities Pledged Financial Instruments, Not Separately Reported, Securities Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Statement [Table] Statement [Table] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Statement [Line Items] Statement [Line Items] Net income Net Income (Loss) Attributable to Parent Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Unrealized holding gains (losses) on available for sale securities during the period Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax Change in net unrealized loss on securities transferred to held to maturity Available for Sale Securities, Transferred to Held-to-Maturity, Net Unrealized Gain The net unrealized gain in Other Comprehensiev Income for available for sale securities transferred to held-to-maturity. This amount will be amortized over the life of the securities. Noncredit portion of other-than-temporary impairment losses on the AFS securities Available For Sale Securities Other Than Temporary Impairment Non Credit Portion The amount of other than temporary impairment loss on a debt security, categorized as Available-for-sale. This amount is a portion of the gross unrealized losses not realized in earnings. Reclassification adjustment for net gain on sale of available for sale securities, included in net income Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Reclassification of other-than-temporary impairment charges on available for sale securities, included in net income Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Securities Amortization of net actuarial loss, included in net periodic benefit cost Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), before Tax Amortization of prior service credit, included in net periodic benefit cost Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), before Tax Other comprehensive income (loss), before tax Other Comprehensive Income (Loss), before Tax Income tax (expense) benefit related to other items of comprehensive income Other Comprehensive Income (Loss), Tax Other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract] Schedule of Defined Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans [Axis] Defined Benefit Plan and Other Postretirement Benefit Plan [Domain] Defined Benefit Pension Plan Pension Plan [Member] Restoration Plan Other Pension Plan [Member] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] Service cost Defined Benefit Plan, Service Cost Interest cost Defined Benefit Plan, Interest Cost Expected return on assets Defined Benefit Plan, Expected Return on Plan Assets Net actuarial loss recognition Defined Benefit Plan, Amortization of Gains (Losses) Prior service (credit) cost amortization Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Net periodic benefit cost Defined Benefit Plan, Net Periodic Benefit Cost Pension and Other Postretirement Benefit Contributions [Abstract] Pension and Other Postretirement Benefit Contributions [Abstract] Pension and other postretirement benefit contributions Pension and Other Postretirement Benefit Contributions Receivables [Abstract] Schedule of Financing Receivable, Troubled Debt Restructurings [Table] Financing Receivable, Troubled Debt Restructuring [Axis] Financing Receivable, Troubled Debt Restructuring [Domain] Construction Construction Loans [Member] 1-4 Family Residential Residential Real Estate [Member] Other Commercial Real Estate Portfolio Segment [Member] Commercial Loans Commercial Loan [Member] Municipal Loans Municipal Loans [Member] Class of financing receivables related to state, city or local governments or the agencies operated by state, city or local governments. Loans to Individuals Consumer Loan [Member] Financing Receivable, Modifications [Line Items] Troubled Debt Restructuring [Abstract] Restructuring and Related Activities [Abstract] Extend Amortization Period Loan modification related to extending amortization period The amount of modified outstanding recorded investment related to extending amortization period. Interest Rate Reductions Loan modification related to lowering interest rates The amount of modified outstanding recorded investment related to lowering interest rates. Combination (1) Loan modification extending amortization period, lowering interest rate, and principal forgiveness The amount of the modified outstanding recorded investment related to amortization period, lowering interest rate, and principal forgiveness of loans. Total Modifications Financing Receivable, Modifications, Total Modifications for the Period Financing Receivable, Modifications, Total Modifications for the Period Number of Loans Financing Receivable, Modifications, Number of Contracts Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] LIBOR [Member] LIBOR [Member] LIBOR [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Federal Home Loan Bank Advances Federal Home Loan Bank Advances [Member] Southside Statutory Trust III Southside Statutory Trust III [Member] Debt obligations for Southside Statutory Trust III. Southside Statutory Trust V Southside Statutory Trust V [Member] Debt obligation for Southside Statutory Trust V. Southside Statutory Trust IV Southside Statutory Trust IV [Member] Debt obligation for Southside Statutory Trust IV. Magnolia Trust Company I Magnolia Trust Company I [Member] Debt obligation for Magnolia Trust Company I. Debt Instrument [Line Items] Maturity date Maturity date The maturity date of outstanding debt instruments are required to be repaid. Debt Instruments [Abstract] Debt Instruments [Abstract] FHLB advances Long-term Federal Home Loan Bank Advances Long-term debt Other Long-term Debt Total long-term obligations Long-term Debt Advances from Federal Home Loan Banks [Abstract] Long-term Federal Home Loan Bank Advances [Abstract] Weighted average cost (in hundredths) Debt, Weighted Average Interest Rate Maturity date range, earliest Debt Instrument, Maturity Date Range, Start Maturity date range, latest Debt Instrument, Maturity Date Range, End Long-term Debt, Other Disclosures [Abstract] Long-term Debt, Other Disclosures [Abstract] Debt Instrument, Basis Spread on Variable Rate Debt Instrument, Basis Spread on Variable Rate Adjusted rate of debt (in hundredths) Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate Date of interest rate adjustment Date of interest rate adjustment This element represent the adjustment date of interest rate. Debt Instrument, Description of Variable Rate Basis Debt Instrument, Description of Variable Rate Basis Commitments and Contingencies Disclosure [Abstract] Commitments and Guarantee Obligations [Table] Other Commitments [Table] Unused Commitments and Guarantee Obligations Type [Axis] Other Commitments [Axis] Unused Commitments and Guarantee Obligations Type [Domain] Other Commitments [Domain] Standby letters of credit Standby Letters of Credit [Member] Credit card and ready reserve Credit Card and Ready Reserve [Member] Credit Card and Ready Reserve [Member] Commitments and Guarantee Obligations [Line Items] Other Commitments [Line Items] Maturity of credit card and ready reserves Maturity of credit card and ready reserves This element represent the year that unused commitments for credit and ready reserves are due. Financial instruments with off-balance-sheet-risk: [Abstract] -- None. No documentation exists for this element. -- Unused Commitments: Contractual Obligation, Fiscal Year Maturity [Abstract] Due in one year or less Contractual Obligation, Due in Next Twelve Months Due after one year Contractual Obligation, Due After 12 Months Contractual Obligation, Due After 12 Months Total outstanding unused commitments Contractual Obligation Letters of Credit Outstanding, Amount Letters of Credit Outstanding, Amount Securities: Available-for-sale Securities and Held-to-maturity Securities [Abstract] Unsettled trades to purchase securities Unsettled Trades to Purchase Securities Liability Amount of securities purchased that were not settled by the end of the period. The amount recorded is the purchase price including any accrued interest. This asset is collected upon delivery of the securities. Unsettled trades to sell securities Unsettled Trades to Sell Securities Amount of securities sold that were not settled by the end of the period. The amount recorded is the selling price including any accrued interest. This asset is collected upon delivery of the securities. Deposits: Deposits [Abstract] Unsettled issuances of brokered CDs Unsettled Issuances of Brokered CDs Amount of brokered CDs sold that were not settled by the end of the period. The amount recorded is the selling price including any accrued interest. Business Combinations [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] OmniAmerican Bancorp, Inc. [Member] OmniAmerican Bancorp, Inc. [Member] OmniAmerican Bancorp, Inc. Business Acquisition [Line Items] Business Acquisition [Line Items] Assets Assets Noncash or Part Noncash Acquisition, Company Stock Consideration, Per Each Share of Acquiree Stock, Shares Issued Noncash or Part Noncash Acquisition, Company Stock Consideration, Per Each Share of Acquiree Stock, Shares Issued Noncash or Part Noncash Acquisition, Company Stock Consideration, Per Each Share of Acquiree Stock, Shares Issued Noncash or Part Noncash Acquisition, Cash Consideration, Per Each Share of Acquiree Stock Noncash or Part Noncash Acquisition, Cash Consideration, Per Each Share of Acquiree Stock Noncash or Part Noncash Acquisition, Cash Consideration, Per Each Share of Acquiree Stock Schedule of Allowance For Loan Losses, Loan Balance, by Impairment Method [Table] Schedule of Allowance For Loan Losses, Loan Balance, by Impairment Method [Table] Schedule of Allowance For Loan Losses, Loan Balance, by Impairment Method [Table] Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] Class of Financing Receivable [Domain] Class of Financing Receivable [Domain] Unallocated Unallocated Financing Receivables [Member] Schedule of Allowance For Loan Losses, Loan Balance, by Impairment Method [Line Items] Schedule of Allowance For Loan Losses, Loan Balance, by Impairment Method [Line Items] [Line Items] for Schedule of Allowance For Loan Losses, Loan Balance, by Impairment Method [Table] Loans individually evaluated for impairment Financing Receivable, Individually Evaluated for Impairment Loans collectively evaluated for impairment Financing Receivable, Collectively Evaluated for Impairment Total ending loans balance Loans and Leases Receivable, Gross Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table] Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] Pass Pass [Member] Pass Watch Pass Watch [Member] A category of financing receivables not considered to be special mention, substandard, doubtful, and loss receivables. Special Mention Special Mention [Member] Substandard Substandard [Member] Doubtful Doubtful [Member] Financing Receivable, Recorded Investment [Line Items] Financing Receivable, Recorded Investment, Credit Quality Indicator [Abstract] Financing Receivable Recorded Investment By Credit Quality Indicator [Abstract] -- None. No documentation exists for this element. -- Total ending loans balance Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Fair Value Disclosures [Abstract] Summary of fair value measurement on recurring and nonrecurring basis segregated by level of valuation inputs within fair value hierarchy utilized to measure fair value Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Table Text Block] Financial assets and liabilities measured at fair value on a recurring basis with utilized level 3 inputs to determine fair value Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Financial assets, financial liabilities, and unrecognized financial instruments at carrying amount and fair value Fair Value, by Balance Sheet Grouping [Table Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Stock dividends, percentage of common stock Stock Dividends, Percentage of Common Stock Stock Dividends, Percentage of Common Stock Earnings Per Share [Abstract] Basic and Diluted Earnings: Net Income (Loss) Attributable to Parent [Abstract] Net income Basic weighted-average shares outstanding Weighted Average Number of Shares Outstanding, Basic Add: Stock options Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Diluted weighted-average shares outstanding Weighted Average Number of Shares Outstanding, Diluted Basic Earnings Per Share: Earnings Per Share, Basic [Abstract] Earnings per common share - basic (in dollars per share) Earnings Per Share, Basic Diluted Earnings Per Share: Earnings Per Share, Diluted [Abstract] Earnings per common share - diluted (in dollars per share) Earnings Per Share, Diluted Antidilutive securities from non-qualified stock options excluded from calculating earnings Antidilutive Securities Excluded From Earnings Per Share [Abstract] -- None. No documentation exists for this element. -- Number of antidilutive options (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Schedule of Available-for-sale and Held to Maturity Securities [Table] Schedule of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities and of all investments in certain debt and equity securities for which the entity has the positive intent and ability to hold until maturity. Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Domain] Major Types of Debt and Equity Securities [Domain] Investment Securities: Investment Securities Class [Domain] US Treasury US Treasury Securities [Member] US Government Agency Debentures US Government-sponsored Enterprises Debt Securities [Member] State and Political Subdivisions US States and Political Subdivisions Debt Securities [Member] Other Stocks and Bonds Other Stocks and Bonds [Member] This category includes information about ownership interests or the right to acquire ownership interests in corporations and other legal entities which ownership interest is represented by shares of common or preferred stock (which is neither mandatorily redeemable no redeemable at the option of the holder), convertible securities, stock rights, or stock warrants, and debt instrument issued by corporations, governments and governmental agencies, municipalities, and other institutions. Mortgage-backed Securities: Asset-backed Securities [Member] Residential MBS Residential Mortgage Backed Securities [Member] Commercial MBS Commercial Mortgage Backed Securities [Member] Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] AVAILABLE FOR SALE Available-for-sale Securities, Balance Sheet, Reported Amounts [Abstract] Amortized cost Available-for-sale Securities, Amortized Cost Basis Gross unrealized gains, OCI Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax Gross unrealized losses, OCI Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax Estimated fair value Available-for-sale Securities HELD TO MATURITY Held-to-maturity Securities, Balance Sheet, Reported Amounts [Abstract] Amortized cost Held to Maturity Amortized Cost Basis Amortized cost basis before transfer from available for sale to held to maturity. Held To Maturity Securities Gross Unrealized Gains Recognized in Other Comprehensive Income Held To Maturity Securities Gross Unrealized Gains Recognized in Other Comprehensive Income Held To Maturity Securities Gross Unrealized Gains Recognized in Other Comprehensive Income. Held To Maturity Securities Gross Unrealized Losses Recognized in OCI Held To Maturity Securities Gross Unrealized Losses Recognized in OCI Gross unrealized losses for Held to Maturity Securities recognized in OCI. Carrying value Held-to-maturity Securities Gross unrealized gains Held-to-maturity Securities, Accumulated Unrecognized Holding Gain Gross unrealized losses Held-to-maturity Securities, Accumulated Unrecognized Holding Loss Estimated fair value Held-to-maturity Securities, Fair Value Statement of Stockholders' Equity [Abstract] Issuance of common stock (in shares) Stock Issued During Period, Shares, New Issues Dividends paid on common stock (in dollars per shares) Common Stock, Dividends, Per Share, Cash Paid Purchase of common stock (in shares) Treasury Stock, Shares, Acquired Classification of loans in the consolidated balance sheets Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Activity in the allowance for loan losses by portfolio segment Allowance for Credit Losses on Financing Receivables [Table Text Block] Balance in the allowance for loan losses by portfolio segment based on impairment method Balance in the allowance for loan losses and recorded investment in loans by portfolio segment based on impairment method [Table Text Block] Tabular disclosure of balance in the allowance for loan losses and recorded investment in loans by portfolio segment. Balance in recorded investments in loans by portfolio segment based on impairment method Impaired Financing Receivables [Table Text Block] Summary of loans by credit quality indicators Financing Receivable Credit Quality Indicators [Table Text Block] Summary of nonperforming assets for the period Summary of nonperforming assets for the period [Table Text Block] Tabular disclosure of nonperforming assets. Recorded investment in nonaccrual and accruing loans past due more than 90 days by class of loans Past Due Financing Receivables [Table Text Block] Aging of recorded investment in past due loans by class of loans Aging of recorded investment in past due loans by class of loans [Table Text Block] Tabular disclosure of recorded investment in past due loans by class of loans. Average recorded investment and interest income on impaired loans Summary of impaired loans, primarily nonaccrual loans [Table Text Block] Tabular disclosure of nonaccrual impaired loans. Summary of impaired loans by class of loans for the period Summary of impaired loans by class of loans for the period [Table Text Block] Tabular disclosure of impaired loans by class of loans for the period. Schedule of recorded investment in loans modified Troubled Debt Restructurings on Financing Receivables [Table Text Block] Nonperforming Assets by Asset Class [Abstract] Nonperforming Assets [Abstract] -- None. No documentation exists for this element. -- Nonaccrual loans Financing Receivable, Recorded Investment, Nonaccrual Status Accruing loans past due more than 90 days Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing Restructured loans Financing Receivable, Modifications, Recorded Investment Other real estate owned Real Estate Acquired Through Foreclosure Repossessed assets Other Repossessed Assets Total nonperforming assets Financing Receivable, Net Earnings per share on a basic and diluted basis Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Statement of Financial Position [Abstract] Held to Maturity, Investment Securities, fair value Investment Securities Held-to-maturity Securities, Fair Value Disclosure Investment Securities Held-to-maturity Securities, Fair Value Disclosure Held to Maturity, Mortgage Backed Securities, fair value Mortgage-backed Securities Held-to-maturity, Fair Value Disclosure LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Shareholders' equity: Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] 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 Treasury stock (in shares) Treasury Stock, Shares Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Share-based Incentive Plans Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Share-based Incentive Plans [Abstract] Share-based Incentive Plans [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] Plan Name [Axis] Plan Name [Domain] 2009 Incentive Plan Incentive Plan 2009 [Member] Name of the equity-based compensation arrangement plan. Award Type [Axis] Equity Award [Domain] Restricted Stock Restricted Stock [Member] Stock Options Employee Stock Option [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Shares Available for Grant for All Share-based Plans [Roll Forward] Shares available for grant [Abstract] -- None. No documentation exists for this element. -- Balance, January 1, 2014 (shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Granted (shares) Share-based Compensation Arrangement by Share-based Payment Award, Granted in Period, Number of Shares Available for Grant The number of shares available for grants granted during the period. Stock awards vested (shares) Share-based Compensation Arrangement by Share-based Payment Award, Stock Awards Vested in Period, Number of Shares Available for Grant The number of shares available for grants vested during the period. Forfeited (shares) Share-based Compensation Arrangement by Share-based Payment Award Number of Shares Available for Grant Forfeited The number of shares available for grants that were forfeited during the period. Canceled/expired (shares) Share-based Compensation Arrangement by Share-based Payment Award, Expired in Period, Number of Shares Available for Grant The number of shares available for grants that expired during the period. Balance, June 30, 2014 (shares) Restricted Stock Units Outstanding Restricted Stock Units Outstanding [Abstract] Restricted Stock Units Outstanding [Abstract] Number of shares Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] Balance, January 1, 2014 (shares) Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number Granted (shares) Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted Stock awards vested (shares) Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Vested Number of non-option equity instruments vested during the period. Forfeited (shares) Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Forfeitures Canceled/expired (shares) Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Expirations Balance, June 30, 2014 (shares) Weighted- Average Grant-Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Balance, January 1, 2014 (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 Stock awards vested (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 (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 Canceled/expired (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, expired, Weighted Average Grant Date Fair Value Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that expired. Balance, June 30, 2014 (in dollars per share) Stock Options Outstanding Stock Options Outstanding [Abstract] Stock Options Outstanding [Abstract] Number of shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Balance, January 1, 2014 (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Granted (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Stock options exercised (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Stock awards vested (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares Forfeited (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Canceled/expired (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period Balance, June 30, 2014 (shares) Weighted- Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Balance, January 1, 2014 (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 Stock options exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Forfeited (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Canceled/expired (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price Balance, June 30, 2014 (in dollars per share) Weighted- Average Grant-Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Balance, January 1, 2014 (in dollars per share) Share-based compensation arrangement by share-based payment award, options, outstanding, weighted average grant-date fair value Weighted average grant-date fair value price at which grantees can acquire the shares reserved for issuance under the stock option plan. Granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Stock options exercised (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercised in Period, Weighted Average Grant Date Fair Value The weighted average grant-date fair value of options exercised during the reporting period as calculated by applying the disclosed option pricing methodology. Stock awards vested (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Weighted Average Grant Date Fair Value Forfeited (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Weighted Average Grant Date Fair Value Canceled/expired (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Grant Date Fair Value Weighted average grant date fair value of options that expired. Balance, June 30, 2014 (in dollars per share) Statement of Cash Flows [Abstract] OPERATING ACTIVITIES: Payments for Operating Activities [Abstract] Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Adjustments to reconcile net income to net cash provided by operations: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation Depreciation, Nonproduction Amortization of premium Amortization Accretion of discount and loan fees Accretion (Amortization) of Discounts and Premiums, Investments Provision for loan losses Provision for Loan and Lease Losses Stock compensation expense Share-based Compensation Increase (Decrease) in Deferred Income Taxes Increase (Decrease) in Deferred Income Taxes Excess tax benefits from stock-based compensation Excess Tax Benefit from Share-based Compensation, Operating Activities Net gain on sale of securities available for sale Available-for-sale Securities, Gross Realized Gain (Loss), Excluding Other than Temporary Impairments Net other-than-temporary impairment losses Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net Gain on premises and equipment Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Loss (gain) on other real estate owned Gains (Losses) on Sales of Other Real Estate Net change in: Increase (Decrease) in Operating Capital [Abstract] Interest receivable Increase (Decrease) in Accrued Interest Receivable, Net Other assets Increase (Decrease) in Other Operating Assets Interest payable Increase (Decrease) in Interest Payable, Net Other liabilities Increase (Decrease) in Other Operating Liabilities Loans held for sale Increase (Decrease) in Mortgage Loans Held-for-sale Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities INVESTING ACTIVITIES: Net Cash Provided by (Used in) Investing Activities [Abstract] Securities held to maturity: Held-to-maturity Securities [Abstract] Purchases Payments to Acquire Held-to-maturity Securities Maturities, calls and principal repayments Proceeds from Maturities, Prepayments and Calls of Held-to-maturity Securities Securities available for sale: Available-for-sale Securities [Abstract] Purchases Payments to Acquire Available-for-sale Securities Sales Proceeds from Sale of Available-for-sale Securities Maturities, calls and principal repayments Proceeds from Maturities, Prepayments and Calls of Available-for-sale Securities Proceeds from redemption of FHLB stock Proceeds from Sale of Federal Reserve Bank Stock Purchases of FHLB stock and other investments Payments to Acquire Federal Reserve Bank Stock Net increase in loans Payments for (Proceeds from) Loans and Leases Purchases of premises and equipment Payments to Acquire Property, Plant, and Equipment Proceeds from sales of premises and equipment Proceeds from Sale of Property, Plant, and Equipment Proceeds from sales of other real estate owned Proceeds from Sale of Wholly Owned Real Estate and Real Estate Acquired in Settlement of Loans Proceeds from sales of repossessed assets Proceeds from Sale of Foreclosed Assets Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Investing Activities FINANCING ACTIVITIES: Net Cash Provided by (Used in) Financing Activities [Abstract] Net increase in demand and savings accounts Net increase in demand and savings accounts The net cash inflow or outflow in the total of all savings account and demand deposits, including checking, negotiable order of withdrawal (NOW) accounts, passbook, statement savings accounts and money-market deposit accounts (MMDAs) classified as cash flows from financing activities. Net decrease in certificates of deposit Increase (Decrease) in Time Deposits Net increase (decrease) in federal funds purchased and repurchase agreements Increase (Decrease) in Federal Funds Purchased and Securities Sold under Agreements to Repurchase, Net Proceeds from FHLB advances Proceeds from Federal Home Loan Bank Borrowings Repayment of FHLB advances Repayments of Federal Home Loan Bank Borrowings Excess tax benefits from stock-based awards Excess Tax Benefit from Share-based Compensation, Financing Activities Net issuance of common stock under employee stock plan Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options Purchase of common stock Payments for Repurchase of Common Stock Proceeds from the issuance of common stock Proceeds from Issuance of Common Stock Cash dividends paid Payments of Ordinary Dividends, Common Stock Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Net increase (decrease) in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents at beginning of period Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents at end of period SUPPLEMENTAL DISCLOSURES FOR CASH FLOW INFORMATION: Supplemental Cash Flow Information [Abstract] Interest paid Interest Paid Income taxes paid Income Taxes Paid SUPPLEMENTAL DISCLOSURES OF NONCASH INVESTING AND FINANCING ACTIVITIES: Noncash Investing and Financing Items [Abstract] Loans transferred to other repossessed assets and real estate through foreclosure Loans transferred to other repossessed assets and real estate through foreclosure The acquisition of assets and real estate received in full or partial satisfaction of a receivable including real and personal property; equity interests in corporations, partnerships, and joint ventures; and beneficial interests in trusts. Transfer of available for sale securities to held to maturity securities Securities Transferred From Available for Sale to Held to Maturity Securities Transferred From Available for Sale to Held to Maturity Adjustment to pension liability Adjustment to pension liability Net changes to pension liability during the period related to benefit plans, after tax. 5% stock dividend Declaration of 5% stock dividend Stock dividends for shareholders declared by an entity during the period. This element includes paid and unpaid dividends declared during the period. Unsettled trades to purchase securities ASSETS Assets [Abstract] Cash and due from banks Cash and Due from Banks Interest earning deposits Interest-bearing Deposits in Banks and Other Financial Institutions Total cash and cash equivalents Investment securities: Marketable Securities [Abstract] Available for sale, at estimated fair value Available For Sale, Investment Securities For an unclassified balance sheet, this item represents investment securities in debt and equity securities which are categorized neither as held-to-maturity nor trading. Held to maturity, carrying value Held to maturity investment securities carrying value The carrying value of held to maturity investment securities. Mortgage-backed securities: Mortgage Backed And Related Securities [Abstract] Mortgage Backed And Related Securities [Abstract] Available for sale, at estimated fair value Available For Sale Mortgage Backed Fair Value For an unclassified balance sheet, this item represents mortgage-backed and related securities in debt and equity securities which are categorized neither as held-to-maturity nor trading. Held to maturity, carrying value Held To Maturity Mortgage Backed Carrying Cost The carrying value of held to maturity mortgage backed securities. FHLB stock, at cost Federal Home Loan Bank Stock Other investments, at cost Other Investments and Securities, at Cost Loans held for sale Disposal Group, Including Discontinued Operation, Loans Receivable, Net Loans: Loans and Leases Receivable, Net Amount [Abstract] Loans Less: Allowance for loan losses Loans and Leases Receivable, Allowance Net loans Loans and Leases Receivable, Net Amount Premises and equipment, net Property, Plant and Equipment, Net Goodwill Goodwill Other intangible assets, net Intangible Assets, Net (Excluding Goodwill) Interest receivable Interest Receivable Deferred tax asset Deferred Tax Assets, Net of Valuation Allowance Other assets Other Assets TOTAL ASSETS Noninterest bearing Noninterest-bearing Deposit Liabilities Interest bearing Interest-bearing Deposit Liabilities Total deposits Deposits Short-term obligations: Short-term Debt [Abstract] Federal funds purchased and repurchase agreements Federal Funds Purchased and Securities Sold under Agreements to Repurchase FHLB advances Federal Home Loan Bank, Advances, Maturities Summary, Due in Next Twelve Months Total short-term obligations Short-term Debt Long-term obligations: Long-term Debt, Unclassified [Abstract] Long-term debt Other liabilities Other Liabilities TOTAL LIABILITIES Liabilities Off-Balance Sheet Arrangements, Commitments and Contingencies Commitments and Contingencies Shareholders' equity: Common stock ($1.25 par, 40,000,000 shares authorized, 21,315,256 shares issued at June 30, 2014 and 20,386,221 shares issued at December 31, 2013) Common Stock, Value, Issued Paid-in capital Additional Paid in Capital, Common Stock Retained earnings Retained Earnings (Accumulated Deficit) Treasury stock (2,469,638 shares at cost) Treasury Stock, Value Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax TOTAL SHAREHOLDERS' EQUITY Stockholders' Equity Attributable to Parent TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities and Equity Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Carrying Amount Reported Value Measurement [Member] Level 1 Fair Value, Inputs, Level 1 [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Level 3 Fair Value, Inputs, Level 3 [Member] Total Gains (Losses) Total Gains (Losses) [Member] Total gains (losses) recognized from fair value measurement. Asset Class [Axis] Asset Class [Axis] Asset Class [Domain] Asset Class [Domain] Foreclosed assets Foreclosed Assets [Member] Foreclosed Assets [Member] Impaired loans Receivable, Impaired [Member] Receivable, Impaired [Member] Major Types of Debt and Equity Securities [Axis] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Total recurring fair value measurements Assets, Fair Value Disclosure, Recurring Total nonrecurring fair value measurements Assets, Fair Value Disclosure, Nonrecurring Fair Value Measurements, Recurring and Nonrecurring [Table] Securities Securities (Assets) [Member] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Balance at Beginning of Period Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Total gains or losses realized and unrealized [Abstract] Total gains or losses Realized and Unrealized [Abstract] Total gains or losses Realized and Unrealized [Abstract] Included in earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Included in other comprehensive income (loss) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Issuances Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Issuances Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Transfers in and/or out of Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net Balance at End of Period Fair value, assets measured on recurring basis, change in unrealized gain (loss) Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) Interest Receivable on Impaired Loans [Abstract] Interest Receivable on Impaired Loans [Abstract] Schedule of Impaired Financing Receivable [Table] Schedule of Impaired Financing Receivable [Table] Financing Receivable, Impaired [Line Items] Financing Receivable, Impaired [Line Items] Impaired Financing Receivable, Average Recorded Investment and Interest Income on Impaired Loans [Abstract] Impaired Financing Receivable, Average Recorded Investment [Abstract] Average recorded investment Impaired Financing Receivable, Average Recorded Investment Interest income recognized Impaired Financing Receivable, Interest Income, Cash Basis Method Accruing interest at original contracted rate Impaired Financing Receivable, Interest Income, Accrual Method Off-Balance-Sheet Arrangements, Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Income Taxes Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule of Business Acquisitions, by Acquisition [Table Text Block] Schedule of Business Acquisitions, by Acquisition [Table Text Block] Schedule of Financing Receivables Past Due [Table] Schedule of Financing Receivables Past Due [Table] Financing Receivable, Recorded Investment, Past Due [Line Items] Financing Receivable, Recorded Investment, Past Due [Line Items] Nonaccrual loans Schedule of Allowance For Loan Losses, Allowance Balance, by Impairment Method [Table] Schedule of Allowance For Loan Losses, Allowance Balance, by Impairment Method [Table] Schedule of Allowance For Loan Losses, Allowance Balance, by Impairment Method [Table] Schedule of Allowance For Loan Losses, Allowance Balance, by Impairment Method [Line Items] Schedule of Allowance For Loan Losses, Allowance Balance, by Impairment Method [Line Items] [Line Items] for Schedule of Allowance For Loan Losses, Allowance Balance, by Impairment Method Ending balance - individually evaluated for impairment Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment Ending balance - collectively evaluated for impairment Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment Balance at end of period Financing Receivable, Allowance for Credit Losses Fair Value Measurement Fair Value Disclosures [Text Block] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Maximum Maximum [Member] Minimum Minimum [Member] Award Type [Axis] Award Type [Domain] Nonqualified Stock Options Nonqualified Stock Options [Member] Nonqualified stock options (NQSOs) granted under the 2009 incentive plan. Vesting Schedule [Axis] Vesting [Axis] Type of Vesting Schedule [Domain] Vesting [Domain] Three Year Vesting Schedule Three Year Vesting Schedule [Member] Three year vesting schedule for share-base compensation plan. Four Year Vesting Schedule Four Year Vesting Schedule [Member] Four year vesting schedule for share-base compensation plan. Plan Name [Axis] Plan Name [Domain] Common stocks reserved and available for issuance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Number of nonvested awards outstanding (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Share-based compensation expense Allocated Share-based Compensation Expense Income tax benefit related to stock compensation expense Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Unrecognized compensation expense Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Compensation cost not yet recognized, period for recognition (in years) Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Contractual term Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Award vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Schedule of Financing Receivable, Allowance for Credit Losses [Table] Financing Receivable, Allowance for Credit Losses [Line Items] Financing Receivable, Allowance for Credit Losses [Line Items] Change in Allowances for Loan Losses [Abstract] Allowances for loan losses [Abstract] -- None. No documentation exists for this element. -- Balance at beginning of period Provision (reversal) for loan losses Provision for Loan, Lease, and Other Losses Loans charged off Financing Receivable, Allowance for Credit Losses, Write-downs Recoveries of loans charged off Financing Receivable, Allowance for Credit Losses, Recovery Balance at end of period Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract] Employee Benefit Plans Pension and Other Postretirement Benefits Disclosure [Text Block] Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract] Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassifications out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of accumulated other comprehensive income Reclassification out of Accumulated Other Comprehensive Income [Member] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Net other unrealized investment gain (loss) Accumulated Net Unrealized Investment Gain (Loss) [Member] Accumulated defined benefit plans adjustment Accumulated Defined Benefit Plans Adjustment [Member] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Realized (loss) gain on sale of securities Gain (Loss) on Sale of Securities, Net Impairment losses Net Loss Prior service credit Income before income tax expense Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Tax benefit (expense) Income Tax Expense (Benefit) Common Stock Common Stock [Member] Paid In Capital Additional Paid-in Capital [Member] Retained Earnings Retained Earnings [Member] Treasury Stock Treasury Stock [Member] Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss) [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Balance Net Income Other comprehensive income (loss) Issuance of common stock Stock Issued During Period, Value, New Issues Purchase of common stock Treasury Stock, Value, Acquired, Cost Method Stock compensation expense Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Tax benefit of incentive stock options or awards Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation Net issuance of common stock under employee stock plan Proceeds from Stock Plans Cash dividends paid on common stock Dividends, Common Stock, Cash Stock dividend declared Dividends, Common Stock, Stock Balance Document and Entity Information [Abstract] -- None. No documentation exists for this element. -- Entities [Table] Entities [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Entity Information [Line Items] Entity Information [Line Items] Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Document Type Document Period End Date Document Fiscal Year Focus Document Fiscal Period Focus Amendment Flag Entity Common Stock, Shares Outstanding Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Class of Financing Receivable [Axis] Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Loans and Leases Receivable Disclosure [Abstract] Loans and Leases Receivable Disclosure [Abstract] Less: Allowance for loan losses Available-for-sale Securities, Amortized Cost Basis [Abstract] Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] Due in one year or less 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 Total available-for-sale investment securities, amortized cost Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis Mortgage-backed Securities: Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Amortized Cost Basis Total Available-for-sale Debt Securities, Amortized Cost Basis Available-for-sale Securities, Fair Value, Fiscal Year Maturity [Abstract] Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] Due in one year or less 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 Total available-for-sale investment securities Available-for-sale Securities, Debt Maturities, Single Maturity Date Mortgage-backed Securities: Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value Total Held to Maturity Securities, Amortized Amount [Abstract] Held-to-maturity Securities, Debt Maturities, Net Carrying Amount [Abstract] Due in one year or less 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 Total held-to-maturity investment securities Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis Mortgage-backed securities Held-to-maturity Securities, Debt Maturities, without Single Maturity Date, Net Carrying Amount Held to Maturity Securities, Fair Value [Abstract] Held-to-maturity Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] Due in one year or less 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 Total held-to-maturity investment securities Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Fair Value Mortgage-backed Securities: Held-to-maturity Securities, Debt Maturities, without Single Maturity Date, Fair Value Total Total held to maturities debt maturities by date and maturity date This item represents the total of all debt securities by maturity, at fair value, which are categorized as held-to-maturity. Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Accumulated Other Comprehensive (Loss) Income Comprehensive Income (Loss) Note [Text Block] The components of net periodic benefit cost Schedule of Net Benefit Costs [Table Text Block] Net deferred tax assets Deferred Tax Assets, Net Deferred tax assets, valuation allowance Deferred Tax Assets, Valuation Allowance Unrecognized tax benefits Unrecognized Tax Benefits Income tax expense Effective income tax rate, percent Effective Income Tax Rate Reconciliation, Percent Effective income tax rate, at federal statutory income tax rate, percent Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Impaired Financing Receivable, Recorded Investment [Abstract] Impaired Financing Receivable, Unpaid Principal Balance [Abstract] 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 for Loan Losses Impaired Financing Receivable, Related Allowance Stock compensation issued from available authorized shares (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period Total intrinsic value of stock options outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Total intrinsic value of exercisable stock options Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Total intrinsic value of stock options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Cash received from exercise of stock options Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options Scheduled maturities of unused commitments Contractual Obligation, Fiscal Year Maturity Schedule [Table Text Block] Earnings Per Share Earnings Per Share [Text Block] 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] Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract] Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract] Less than 12 months, fair value Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value More than 12 months, fair value Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value Total fair value Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract] Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract] Less than 12 months, unrealized loss Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss More than 12 months, unrealized loss Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss Total unrealized loss Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract] Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value [Abstract] Less than 12 months, fair value Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value More than 12 months, fair value Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value Total fair value Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract] Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract] Less than 12 months, unrealized loss Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss More than 12 months, unrealized loss Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss Total unrealized loss Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss Financing Receivable, Significant Purchases Financing Receivable, Significant Purchases Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract] Loan Review Larger Dollar Loan Relationship Scope, Aggregate Debt Loan Review Larger Dollar Loan Relationship Scope, Aggregate Debt LoanReviewLargerDollarLoanRelationshipScope_AggregateDebt [Text Block] The loan review scope as it relates to size, focuses more on larger dollar loan relationships Specifically reserved loans or loan relationships threshold Specifically Reserved Loans or Loan Relationships Threshold Specifically Reserved Loans or Loan Relationships Threshold Loans and leases receivable, impaired, commitment to lend Loans and Leases Receivable, Impaired, Commitment to Lend Schedule of accumulated other comprehensive income (loss) by component Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Reclassifications out of accumulated other comprehensive income Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Long-term Obligations Long-term Debt [Text Block] Other than Temporary Impairment Losses, Investments [Abstract] Other than Temporary Impairment Losses, Investments [Abstract] Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward] Balance, beginning of the period Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held Additions for credit losses recognized on debt securities that had previously incurred impairment losses Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, Additional Credit Losses Balance, end of the period Summary of activity in share-based plans Schedule of Share-based Compensation, Activity [Table Text Block] Other information regarding options outstanding and exercisable Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block] Amortized cost and estimated fair value of investment and mortgage-backed securities Unrealized Gain (Loss) on Investments [Table Text Block] Unrealized loss on securities Schedule of Temporary Impairment Losses, Investments [Table Text Block] Credit losses recognized in earnings Other than Temporary Impairment, Credit Losses Recognized in Earnings [Table Text Block] Interest income recognized on securities Investment Income [Table Text Block] Amortized cost, carrying value and fair value of securities presented by contractual maturity Investments Classified by Contractual Maturity Date [Table Text Block] Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Fair Value Hierarchy [Domain] Estimated Fair Value Estimate of Fair Value Measurement [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Financial Assets: Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Investment securities: Investments, Fair Value Disclosure [Abstract] Held to maturity, at carrying value Held to maturity, at carrying value FHLB stock and other investments, at cost Investment in Federal Home Loan Bank Stock, Fair Value Disclosure Loans, net of allowance for loan losses Loans Receivable, Fair Value Disclosure Loans held for sale Loans Held-for-sale, Fair Value Disclosure Financial Liabilities: Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Retail deposits Deposits, Fair Value Disclosure Federal funds purchased and repurchase agreements Federal Funds Purchased and Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure FHLB advances Federal Home Loan Bank Borrowings, Fair Value Disclosure Long-term debt Debt Instrument, Fair Value Disclosure Accumulated Other Comprehensive Income by Component, Changes [Table] Accumulated Other Comprehensive Income (Loss) [Table] Other-than-Temporary Impairment Accumulated Other-than-Temporary Impairment [Member] Net Prior Service Cost (Credit) Accumulated Defined Benefit Plans Adjustment, Net Prior Service Cost (Credit) [Member] Net Unamortized Gain (Loss) Accumulated Defined Benefit Plans Adjustment, Net Unamortized Gain (Loss) [Member] Accumulated Other Comprehensive Income by Component, Changes [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Beginning balance, net of tax Other comprehensive income (loss) before reclassifications Other Comprehensive Income (Loss), before Reclassifications, before Tax Reclassified to income Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax Income tax benefit (expense) Net current-period other comprehensive (loss) income, net of tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Ending balance, net of tax Summary of long-term obligation Schedule of Long-term Debt Instruments [Table Text Block] Income Statement [Abstract] Interest income Interest and Dividend Income, Operating [Abstract] Loans Interest and Fee Income, Loans and Leases Investment securities - taxable Interest Income, Securities, Operating, Taxable Investment securities - tax exempt Interest Income, Securities, Operating, Tax Exempt Mortgage-backed securities Interest Income, Securities, Mortgage Backed FHLB stock and other investments Other Interest and Dividend Income Other interest earning assets Interest Income, Other Total interest income Interest and Dividend Income, Operating Interest expense Interest Expense [Abstract] Deposits Interest Expense, Deposits Short-term obligations Interest Expense, Short-term Borrowings Long-term obligations Interest Expense, Long-term Debt Total interest expense Interest Expense Net interest income Interest Income (Expense), Net Net interest income after provision for loan losses Interest Income (Expense), after Provision for Loan Loss Noninterest income Noninterest Income [Abstract] Deposit services Fees and Commissions, Depositor Accounts Net gain on sale of securities available for sale Total other-than-temporary impairment losses Other than Temporary Impairment Losses, Investments Portion of loss recognized in other comprehensive income (before taxes) Other than Temporary Impairment Losses, Investments, Portion in Other Comprehensive Loss, before Tax, Including Portion Attributable to Noncontrolling Interest Net impairment losses recognized in earnings Gain on sale of loans Gain (Loss) on Sales of Loans, Net Trust income Fees and Commissions, Fiduciary and Trust Activities Bank owned life insurance income Bank Owned Life Insurance Income Other Noninterest Income, Other Operating Income Total noninterest income Noninterest Income Noninterest expense Noninterest Expense [Abstract] Salaries and employee benefits Labor and Related Expense Occupancy expense Occupancy, Net Advertising, travel & entertainment Marketing and Advertising Expense ATM and debit card expense ATM And Debit Card Expense Expenses associated with the cost of offering debit cards and ATM cards. Professional fees Professional Fees Software and data processing expense Information Technology and Data Processing Telephone and communications Communication FDIC insurance Federal Deposit Insurance Corporation Premium Expense FHLB prepayment fees Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Repayment and Penalties Other Other Noninterest Expense Total noninterest expense Noninterest Expense Provision for income tax expense Net income Earnings per common share - basic (in dollars per share) Earnings per common share - diluted (in dollars per share) Current tax provision Current Income Tax Expense (Benefit) Deferred tax (benefit) provision Deferred Income Tax Expense (Benefit) Provision for tax expense charged to operations Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table] Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table] Exercise Price Range [Axis] Exercise Price Range [Axis] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Domain] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Domain] $16.58 - $25.85 Range One [Member] Range One [Member] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] Range of exercise prices, lower range limit (in dollars per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit Range of exercise prices, upper range limit (in dollars per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit Shares Outstanding Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Options Outstanding [Abstract] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Options Outstanding [Abstract] Number of shares Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options Weighted- average exercise price (in dollars per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price Weighted- average remaining contractual term (in years) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term Options Exercisable Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Options Exercisable [Abstract] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Options Exercisable [Abstract] Number of shares Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options Weighted- average exercise price (in dollars per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price Financing Receivable, Recorded Investment, Past Due [Abstract] 30-59 Days Past Due Financing Receivable, Recorded Investment, 30 to 59 Days Past Due 60-89 Days Past Due Financing Receivable, Recorded Investment, 60 to 89 Days Past Due Greater than 90 Days Past Due Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due Total Past Due Financing Receivable, Recorded Investment, Past Due Current Financing Receivable, Recorded Investment, Current Loans and Allowance for Probable Loan Losses Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Interest income recognized on securities [Abstract] Interest and Other Income [Abstract] U.S. Treasury Interest Income, Securities, US Treasury U.S. Government Agency Debentures Interest Income, Securities, Other US Government State and Political Subdivisions Interest Income, Securities, State and Municipal Other Stocks and Bonds Interest Income, Other Stocks and Bonds Represents interest income, including any amortization and accretion (as applicable) of discounts and premiums, derived from securities backed by other stocks and bonds. Mortgage-backed Securities Total interest income on securities Interest and Other Income