Condensed Financial Information of Parent Company Only Disclosure [Abstract] Condensed Financial Statements [Table] Condensed Financial Statements [Table] Consolidated Entities [Axis] Consolidated Entities [Axis] Consolidated Entities [Domain] Consolidated Entities [Domain] Parent Company Parent Company [Member] Condensed Financial Statements, Captions [Line Items] Condensed Financial Statements, Captions [Line Items] Dividends from subsidiaries DividendsReceivedFromSubsidiaries DividendsReceivedFromSubsidiaries Investment securities gains Gain (Loss) on Investments Other income Other Income Income Revenues Interest expense Interest Expense Other expenses Other Expenses Expenses Operating Expenses Income Before Income Tax Benefit and Equity in Undistributed Net Income of Subsidiaries Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Income tax benefit Income Tax Expense (Benefit) Income Before Equity in Undistributed Net Income of Subsidiaries Income Loss From Continuing Operations Before Equity In Undistributed Net Income Of Subsidiaries Income Loss From Continuing Operations Before Equity In Undistributed Net Income Of Subsidiaries Equity in undistributed net income of subsidiaries Equity In Undistributed Earnings Of Subsidiaries Equity In Undistributed Earnings Of Subisidiaries Net Income Available to Common Shareholders Net Income (Loss) Attributable to Parent Total Comprehensive Income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Derivative Instruments and Hedging Activities Disclosure [Abstract] Offsetting Liabilities [Table] Offsetting Liabilities [Table] Counterparty Name [Axis] Counterparty Name [Axis] Counterparty Name [Domain] Counterparty Name [Domain] Customer Counterparties Loan Interest Rate Swap Liabilities Customer Counterparties Loan Interest Rate Swap Liabilities [Member] Customer Counterparties Loan Interest Rate Swap Liabilities [Member] Financial Institution 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Multiemployer Plan Name [Axis] Multiemployer Plan Name [Domain] Multiemployer Plan Name [Domain] Horizon Defined Benefit Plan Horizon Defined Benefit Plan [Member] [Member] Horizon Defined Benefit Plan [Member] [Member] Community Defined Benefit Plan Community Defined Benefit Plan [Member] Community Defined Benefit Plan [Member] Multiemployer Plans [Line Items] Multiemployer Plans [Line Items] Summary Of Stock Option Activity Share-based Compensation, Stock Options, Activity [Table Text Block] Stock Options Outstanding And Exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable [Table Text Block] Weighted Average Assumptions Estimate The Fair Value Of Options Granted Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Restricted Shares Activity And Related Information Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] Summary Of Activity Within The Defined Benefit Plan Schedule of Assumptions Used [Table Text Block] Net Periodic Pension Cost Of The Defined Benefit Plan Schedule of Net Benefit Costs [Table Text Block] Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss) Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block] Summary Of Expected Benefit Payments Schedule of Expected Benefit Payments [Table Text Block] Summary Of Assets Segregated By Level Of Valuation Inputs Within The Fair Value Hierarchy Schedule of Defined Benefit Plans Disclosures [Table Text Block] Schedule of Allocation of Plan Assets Schedule of Allocation of Plan Assets [Table Text Block] Short-term Debt [Abstract] Summary Of Short-Term Borrowings Schedule of Short-term Debt [Table Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Summary Of Significant Accounting And 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Equity Attributable to Parent Other comprehensive income Other Comprehensive Income (Loss), Net of Tax ReclasificationofResidualtTaxImpactofTaxRateChange ReclasificationofResidualtTaxImpactofTaxRateChange ReclasificationofResidualtTaxImpactofTaxRateChange Cash dividends declared Dividends, Common Stock, Cash Stock-based compensation expense, net Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Restricted Awards Granted Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Stock issued during period, value, new issues Stock Issued During Period, Value, New Issues Exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Stock issued during period, value, other Stock Issued During Period, Value, Other Purchase of treasury shares Treasury Stock, Value, Acquired, Par Value Method Ending balance Loans Receivable, Net [Abstract] Loans Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Receivables [Abstract] Schedule of Financing Receivables Past Due [Table] Schedule of Financing Receivables Past Due [Table] Financing Receivables, Period Past Due [Axis] Financing Receivables, Period Past Due [Axis] Financing Receivables, Period Past Due [Domain] Financing Receivables, Period Past Due [Domain] Financing Receivables, 30 to 59 Days Past Due [Member] Financing Receivables, 30 to 59 Days Past Due [Member] Financing Receivables, 60 to 89 Days Past Due [Member] Financing Receivables, 60 to 89 Days Past Due [Member] Financing Receivables, Equal to Greater than 90 Days Past Due [Member] Financing Receivables, Equal to Greater than 90 Days Past Due [Member] Class of Financing Receivable [Axis] Class of Financing Receivable, Type [Axis] Class of Financing Receivable [Domain] Class of Financing Receivable, Type [Domain] Residential real estate Residential Real Estate [Member] Home equity Home Equity Line of Credit [Member] Commercial and industrial Commercial Loan [Member] Commercial real estate Commercial Real Estate [Member] Consumer Loan Consumer Loan [Member] DDA Overdrafts Demand Deposit Account Overdrafts [Member] Demand Deposit Account Overdrafts [Member] Financing Receivable, Recorded Investment, Past Due [Line Items] Financing Receivable, Recorded Investment, Past Due [Line Items] Financing Receivable, Recorded Investment, Past Due Financing Receivable, Recorded Investment, Past Due Current Financing Receivable, Recorded Investment, Current Non-accrual Financing Receivable, Recorded Investment, Nonaccrual Status Gross loans Loans and Leases Receivable, Gross Investments [Abstract] Schedule of Held-to-maturity Securities [Table] Schedule of Held-to-maturity Securities [Table] Debt Security [Axis] Debt Security [Axis] Major Types of Debt Securities [Domain] Major Types of Debt Securities [Domain] Debt Securities Debt Securities [Member] Equity Securities Equity Securities [Member] US Government Agencies Debt Securities US Government Agencies Debt Securities [Member] Trust preferred securities Trust Preferred Securities Subject to Mandatory Redemption [Member] Securities Federal Home Loan Bank Certificates and Obligations (FHLB) [Member] Schedule of Held-to-maturity Securities [Line Items] Schedule of Held-to-maturity Securities [Line Items] Held-to-maturity, Amortized Cost Held-to-maturity Securities Held-to-maturity Securities, Accumulated Unrecognized Holding Gain Held-to-maturity Securities, Accumulated Unrecognized Holding Gain Held-to-maturity Securities, Accumulated Unrecognized Holding Loss Held-to-maturity Securities, Accumulated Unrecognized Holding Loss Securities held-to-maturity, Estimated Fair Value Held-to-maturity Securities, Fair Value Long-term debt Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust Junior subordinated debentures, interest rate Subordinated Borrowing, Interest Rate Junior subordinated debentures, due date Subordinated Borrowing, Due Date Percent over three month LIBOR Rate Distributions On Debentures Interest Rate Over Three Month Libor Rate Distributions On Debentures Interest Rate Over Three Month Libor Rate Junior subordinated debenture, Threshold in days Subordinated Borrowing Threshold In Days After Redemption Date For Redemption In Part Subordinated Borrowing Threshold In Days After Redemption Date For Redemption In Part Earnings Per Share [Abstract] Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Distributed earnings allocated to common shares outstanding Distributed Earnings Undistributed earnings allocated to common shares outstanding Undistributed Earnings, Basic Net earnings allocated to common shareholders Net Income (Loss) Available to Common Stockholders, Basic Average shares outstanding, basic Weighted Average Number of Shares Outstanding, Basic Effect of dilutive securities Weighted Average Number Diluted Shares Outstanding Adjustment Average shares outstanding, diluted Weighted Average Number of Shares Outstanding, Diluted Basic earnings per share Earnings Per Share, Basic Diluted earnings per share Earnings Per Share, Diluted Options to purchase shares of common stock, anti-dilutive Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Earnings Per Share Earnings Per Share [Text Block] Allowance For Loan Losses Allowance for Credit Losses [Text Block] Document And Entity Information [Abstract] Document and Entity Information [Abstract] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Period Focus Document Fiscal Period Focus Document Fiscal Year Focus Document Fiscal Year Focus 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 Trading Symbol Trading Symbol Entity Public Float Entity Public Float Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Schedule of Financing Receivable, Troubled Debt Restructurings [Table] Schedule of Financing Receivable, Troubled Debt Restructurings [Table] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Commercial and industrial Commercial Portfolio Segment [Member] Commercial real estate Commercial Real Estate Portfolio Segment [Member] Residential real estate Residential Portfolio Segment [Member] Home equity Home Equity Portfolio Segment [Member] Home Equity Portfolio Segment [Member] Consumer Consumer Portfolio Segment [Member] Financing Receivable, Modifications [Line Items] Financing Receivable, Modifications [Line Items] Accruing Financing Receivable Recorded Investment Accrual Status Financing Receivable Recorded Investment Accrual Status For Troubled Debt Restructurings Non-Accruing Financing Receivable Modifications Recorded Investment Non Accruing Status Financing Receivable Modifications Recorded Investment Non Accruing Status For Troubled Debt Restructurings. Total Financing Receivable, Modifications, Recorded Investment Number of Contracts Troubled Debt Restructuring Modifications Number Of Contracts Troubled Debt Restructuring Modifications Number Of Contracts Pre-modification Outstanding Recorded Investment Troubled Debt Restructuring Modifications Pre Modification Recorded Investment Troubled Debt Restructuring Modifications Pre Modification Recorded Investment Post-modification Outstanding Recorded Investment Troubled Debt Restructuring Modifications Post Modification Recorded Investment Troubled Debt Restructuring Modifications Post Modification Recorded Investment 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] Realized investment securities gains Realized Investment Gains (Losses) Deferred income tax expense Deferred Income Tax Expense (Benefit) Amortization and accretion Amortization Stock based compensation Share-based Compensation Depreciation Depreciation Asset write down Impairment of Long-Lived Assets to be Disposed of Change in other assets Increase (Decrease) in Other Operating Assets Change in other liabilities Increase (Decrease) in Other Operating Liabilities Equity In Undistributed Earnings Of Subsidiaries Net Cash Provided by Operating Activities Net Cash Provided by (Used in) Operating Activities Investing Activities Net Cash Provided by (Used in) Investing Activities [Abstract] Proceeds from sales of available for sale securities Proceeds from Sale of Available-for-sale Securities Net Cash Provided by Investing Activities Net Cash Provided by (Used in) Investing Activities Financing Activities Net Cash Provided by (Used in) Financing Activities [Abstract] Dividends paid Payments of Dividends Issuance of common stock Proceeds from Issuance of Common Stock Purchases of treasury stock Payments for Repurchase of Common Stock Exercise of stock options Proceeds from Stock Options Exercised Proceeds from exercise of warrants Proceeds from Warrant Exercises Net Cash Provided by (Used in) Financing Activities Net Cash Provided by (Used in) Financing Activities 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 Schedule of Financing Receivable, Allowance for Credit Losses [Table] Schedule of Financing Receivable, Allowance for Credit Losses [Table] Receivables Acquired with Deteriorated Credit Quality [Axis] Receivables Acquired with Deteriorated Credit Quality [Axis] Receivables Acquired with Deteriorated Credit Quality [Domain] Receivables Acquired with Deteriorated Credit Quality [Domain] Receivables Acquired with Deteriorated Credit Quality [Member] Receivables Acquired with Deteriorated Credit Quality [Member] Financing Receivable, Allowance for Credit Losses [Line Items] Financing Receivable, Allowance for Credit Losses [Line Items] Allowance for Loan Losses [Roll Forward] Financing Receivable, Allowance for Credit Losses [Roll Forward] Beginning balance Financing Receivable, Allowance for Credit Losses Charge-offs Financing Receivable, Allowance for Credit Losses, Write-downs Recoveries Financing Receivable, Allowance for Credit Losses, Recovery Provision Provision for Loan, Lease, and Other Losses Provision for acquired loans with deteriorated credit quality Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Provision for Loan Losses Ending balance Allowance for loan loss, Evaluated for impairment, Individually Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment Allowance for loan loss, Evaluated for impairment, Collectively Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses Allowance for loan loss, Total Loans and Leases Receivable, Allowance Loans, Evaluated for impairment, Individually Financing Receivable, Individually Evaluated for Impairment Loans, Evaluated for impairment, Collectively Financing Receivable, Collectively Evaluated for Impairment Loans, Acquired with Deteriorated Credit Quality Loans, Acquired with Deteriorated Credit Quality Loans, Acquired with Deteriorated Credit Quality Computed federal taxes at statutory rate Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount State income taxes, net of federal tax benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Tax effects of: Effective Income Tax Rate Reconciliation, Amount [Abstract] Tax-exempt interest income Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount Bank-owned life insurance Income Tax Reconciliation Bank Owned Life Insurance Tax Effect Income Tax Reconciliation Bank Owned Life Insurance Tax Effect Change in tax rate Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount Other items, net Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount Income tax expense Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [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] $ 30.00 - 34.99 Ranges Of Exercise Prices Thirty Point Zero To Thirty Four Point Ninety Nine [Member] [Domain] [Domain] Ranges Of Exercise Prices Thirty Point Zero To Thirty Four Point Ninety Nine [Member] [Domain] [Domain] 35.00 - 39.99 Ranges Of Exercise Prices Thirty Five Point Zero To Thirty Nine Point Ninety Nine [Member] [Domain] [Domain] Ranges Of Exercise Prices Thirty Five Point Zero To Thirty Nine Point Ninety Nine [Member] [Domain] [Domain] 40.00 - 44.99 Ranges Of Exercise Prices Forty Point Zero To Forty Four Point Ninety Nine [Member] [Domain] [Domain] Ranges Of Exercise Prices Forty Point Zero To Forty Four Point Ninety Nine [Member] [Domain] [Domain] 45.00 - 49.99 Ranges Of Exercise Prices Forty Five Point Zero To Forty Nine Point Ninety Nine [Member] [Domain] [Domain] Ranges Of Exercise Prices Forty Five Point Zero To Forty Nine Point Ninety Nine [Member] [Domain] [Domain] 50.00 - 69.99 Ranges Of Exercise Prices Fifty Point Zero To Sixty Nine Point Ninety Nine [Member] [Domain] [Domain] [Domain] Ranges Of Exercise Prices Fifty Point Zero To Sixty Nine Point Ninety Nine [Member] [Domain] [Domain] [Domain] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Ranges Of Exercise Prices Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price No. of Options Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Weighted-Average Remaining Contractual Life (Months) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Weighted-Average Remaining Contractual Life (Months) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Aggregate Intrinsic Value (in thousands) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value No. of Options Currently Exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number Weighted-Average Exercise Price of Options Currently Exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price Weighted-Average Remaining Contractual Life (Months) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term Aggregate Intrinsic Value of Options Currently Exercisable (in thousands) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value Commitments and Contingencies Disclosure [Abstract] Schedule Of Contractual Obligations From Significant Commitments Other Commitments [Table Text Block] Short-Term Debt Short-term Debt [Text Block] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Scenario, Forecast Scenario, Forecast [Member] Stock Issued During Period, Shares, New Issues Stock Issued During Period, Shares, New Issues Assets Assets [Abstract] Cash Cash Securities available-for-sale Available-for-sale Securities Investment in subsidiaries Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Deferred tax asset, net Deferred Tax Assets, Net Fixed assets Property, Plant and Equipment, Net Other assets Other Assets Total Assets Assets Liabilities Liabilities [Abstract] Junior subordinated debentures Junior Subordinated Notes Dividends payable Dividends Payable Deferred Tax Liabilities, Net Deferred Tax Liabilities, Net Accrued interest payable Interest Payable Other liabilities Other Liabilities Total Liabilities Liabilities Total Shareholders’ Equity Total Liabilities and Shareholders’ Equity Liabilities and Equity Shares Issued, Price Per Share Weighted Average Price Received Per Share Issued, Net of Broker Fees Weighted Average Price Received Per Share Issued, Net of Broker Fees proceedsthatcouldbereceived proceedsthatcouldbereceived proceedsthatcouldbereceived Statement of Comprehensive Income [Abstract] Available-for-Sale Securities Available-for-sale Securities [Abstract] Unrealized (loss) gain on available-for-sale securities arising during period Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax Reclassification adjustment for net gains Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Other comprehensive (loss) income related to available-for-sale securities Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax Defined Benefit Pension Plan Defined Benefit Plan [Abstract] Amortization of actuarial net gains Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), before Tax Recognition of unrealized losses Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax Change in underfunded pension liability Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax Other comprehensive (loss) income before income taxes Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent Tax effect Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent Other comprehensive (loss) income, net of tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Comprehensive income, net of tax Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Asset Class [Axis] Asset Class [Axis] Asset Class [Domain] Asset Class [Domain] Other Assets Other Assets [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Write Downs Included In Other Noninterest Expense Goodwill, Impairment Loss Goodwill, Impairment Loss Collateral discount Unobservable Inputs Fair Value Measurement Collateral Discount Percent Unobservable Inputs Fair Value Measurement Collateral Discount Percent Goodwill and Intangible Assets Disclosure [Abstract] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Core Deposits Core Deposits [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Amortization of intangible assets Amortization of Intangible Assets Finite-lived intangible asset, useful life Finite-Lived Intangible Asset, Useful Life Statement of Cash Flows [Abstract] Cash acquired from acquisition Cash Acquired from Acquisition Other Commitments [Table] Other Commitments [Table] Home equity lines Other commitments Other Commitments [Member] Other Commitments [Member] Fair Value, Off-balance Sheet Risks by Financial Instrument [Axis] Financial Instrument [Axis] Fair Value, Off-balance Sheet Risks, Financial Instruments [Domain] Financial Instruments [Domain] Commitments to extend credit: Commitments to Extend Credit [Member] Loss Contingencies by Nature of Contingency [Axis] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Standby letters of credit Standby Letters of Credit [Member] Commercial letters of credit Letter of Credit [Member] Other Commitments [Line Items] Other Commitments [Line Items] Contractual obligations Commitments and Contingencies Restricted Cash and Investments [Abstract] Restrictions On Cash Due From Banks Cash and Cash Equivalents Disclosure [Text Block] Summary Of Major Classifications For Loans Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Loans and Leases Receivable, Impaired, Commitment to Lend Loans and Leases Receivable, Impaired, Commitment to Lend Loan Review Selection Threshold ($) Loan Review Selection Threshold ($) Loan Review Selection Threshold ($) Interest income forgone Impaired Financing Receivable, Interest Income, Accrual Method Commercial Industrial Loans And Commercial Real Estate Commercial Industrial Loans And Commercial Real Estate [Member] Commercial Industrial Loans And Commercial Real Estate [Member] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] City National City National [Member] City National [Member] Number of offices Number of Stores Number of Reportable Segments Number of Reportable Segments Gain on divestiture of business, net of tax Gain on Divestiture of Business, net of tax Gain on Divestiture of Business, net of tax DiscontinuationofInterestThresholdDays DiscontinuationofInterestThresholdDays DiscontinuationofInterestThresholdDays Past Due Threshold in Days Past Due Threshold in Days Past Due Threshold in Days Threshold period past due for write-off of financing receivable Threshold Period Past Due for Write-off of Financing Receivable Other real estate, foreclosed assets, and repossessed assets Other Real Estate, Foreclosed Assets, and Repossessed Assets Investments in affordable housing limited partnerships Investment In Affordable Housing Limited Partnerships Investment In Affordable Housing Limited Partnerships Cash paid for interest Interest Paid Income taxes paid Income Taxes Paid Interest cost Defined Benefit Plan, Interest Cost Expected return on plan assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement Net amortization and deferral Amortization of Rate Deferral Net Periodic Pension Cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Quarterly Financial Information Disclosure [Abstract] Interest income Interest and Dividend Income, Operating Taxable equivalent adjustment Interest Income Taxable Equivalent Adjustment Interest Income Taxable Equivalent Adjustment Interest income (FTE) Interest Income Fully Taxable Equivalent Interest income, on a tax-equivalent basis. Tax-equivalent interest income is interest income plus the taxes that would have been paid had tax-exempt securities been taxable. This number attempts to enhance the comparability of the performance of assets that have different tax liabilities. Net Interest Income Interest Income Expense Net Including Taxable Equivalent Adjustment Interest Income Expense Net Including Taxable Equivalent Adjustment Provision for loan losses Provision for Loan and Lease Losses Investment securities gains (losses) Noninterest income Noninterest Income Noninterest expense Noninterest Expense Income before income tax expense Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income tax expense Interest Income Taxable Equivalent Adjustment - Tax Interest Income Taxable Equivalent Adjustment - Tax Interest Income Taxable Equivalent Adjustment - Tax Net Income Available to Common Shareholders Basic earnings per common share Diluted earnings per common share Basic Schedule of Investment Income, Reported Amounts, by Category [Table] Investment Income [Table] Schedule of Available-for-sale Securities, Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Domain] Major Types of Debt and Equity Securities [Domain] Obligations of states and political subdivisions US States and Political Subdivisions Debt Securities [Member] U.S. Government agencies Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] Private label Mortgage-backed Securities, Issued by Private Enterprises [Member] Corporate securities Corporate Debt Securities [Member] Investment funds Investment Fund [Member] Investment Fund [Member] Schedule of Investments [Line Items] Schedule of Investments [Line Items] Securities available-for-sale, Less Than Twelve Months, Estimated Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Securities available-for-sale, Twelve Months or Greater, Estimated Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Securities available-for-sale, Total, Estimated Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss Federal Current Federal Tax Expense (Benefit) State Current State and Local Tax Expense (Benefit) Total current tax expense Current Income Tax Expense (Benefit) Total deferred tax expense Schedule of Impaired Financing Receivable [Table] Schedule of Impaired Financing Receivable [Table] Financing Receivable, Impaired [Line Items] Financing Receivable, Impaired [Line Items] With no related allowance recorded, Average recorded investment Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method With an allowance recorded, Average recorded investment Impaired Financing Receivable, with Related Allowance, Average Recorded Investment Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method Employee Benefit Plans Compensation and Employee Benefit Plans [Text Block] Income Statement [Abstract] Interest Income Interest and Dividend Income, Operating [Abstract] Interest and fees on loans Interest and Fee Income, Loans and Leases Interest on investment securities: Interest and Dividend Income, Securities, by Taxable Status [Abstract] Taxable Interest Income, Securities, Operating, Taxable Tax-exempt Interest Income, Securities, Operating, Tax Exempt Interest Income, Deposits with Financial Institutions Interest Income, Deposits with Financial Institutions Total Interest Income Interest Expense Interest Expense [Abstract] Interest on deposits Interest Expense, Deposits Interest on short-term borrowings Interest Expense, Short-term Borrowings Interest on long-term debt Interest Expense, Long-term Debt Total 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 Non-interest Income Noninterest Income [Abstract] Gains on sale of investment securities Gain (Loss) on Sale of Securities, Net Service charges Fees and Commissions, Depositor Accounts Bankcard revenue Fees and Commissions, Credit and Debit Cards Trust and investment management fee income Fees and Commissions, Fiduciary and Trust Activities Bank owned life insurance Bank Owned Life Insurance Income Gain on sale of insurance division Gain (Loss) on Disposition of Business Other income Noninterest Income, Other Total Non-interest Income Non-interest Expense Noninterest Expense [Abstract] Salaries and employee benefits Labor and Related Expense Occupancy related expenses Occupancy, Net Equipment and software related expenses Equipment Expense FDIC insurance expense Federal Deposit Insurance Corporation Premium Expense Advertising Advertising Expense Bankcard expenses Bankcard Expenses Bankcard Expenses Postage, delivery, and statement mailings Postage Expense Office supplies Supplies Expense Legal and professional fees Professional Fees Telecommunications Communication Repossessed asset losses, net of expenses Foreclosed Real Estate Expense Merger related costs Business Combination, Acquisition Related Costs Other expenses Other Noninterest Expense Total Non-interest Expense Income Before Income Taxes Average shares outstanding, diluted Dividends declared per common share Common Stock, Dividends, Per Share, Declared Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Level 1 Fair Value, Inputs, Level 1 [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Level 3 Fair Value, Inputs, Level 3 [Member] Fair Value, by Balance Sheet Grouping, Disclosure Item Amounts [Axis] Measurement Basis [Axis] Fair Value, Disclosure Item Amounts [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] Assets: Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Securities held-to-maturity Other securities Other Securities Fair Value Disclosure Other Securities Fair Value Disclosure Net loans Loans Receivable, Fair Value Disclosure Accrued interest receivable Accrued Interest Receivable Fair Value Disclosure Accrued Interest Receivable Fair Value Disclosure Derivative assets Derivative Asset Liabilities: Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Deposits Deposits, Fair Value Disclosure Short-term debt Short-term Debt, Fair Value Long-term debt Long-term Debt, Fair Value Derivative liabilities Statement of Financial Position [Abstract] Preferred stock, par value Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized Preferred Stock, Shares Authorized Preferred stock, shares issued Preferred Stock, Shares Issued Common stock, par value Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares issued Common Stock, Shares, Issued Common stock, treasury shares Treasury Stock, Common, Shares Maturities of Time Deposits [Abstract] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Time Deposits, at or Above FDIC Insurance Limit Time Deposits, at or Above FDIC Insurance Limit Regulatory Capital Requirements [Abstract] Schedule Of Capital Amounts And Ratios Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block] Derivative Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Consumer DDA overdrafts Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Allowance for loan losses Net Loans Loans and Leases Receivable, Net Amount Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] U.S. Government agencies US Treasury and Government [Member] Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Securities available-for-sale, amortized cost Available-for-sale Securities, Amortized Cost Basis Available-for-sale debt securities, accumulated gross unrealized gain, before tax Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax Available-for-sale debt securities, accumulated gross unrealized loss, before tax Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax Equity [Abstract] Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Unrealized Gains (Losses) on Securities Available-for-Sale Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Member] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Summary Of Deferred Tax Assets And Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Summary Of Income Tax Expense Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Reconciliation Of The Significant Differences Between The Federal Statutory Income Tax Rate And Effective Income Tax Rate Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Reconciliation Of The Unrecognized Tax Benefits Rollforward Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] Reconciliation of the beginning and ending balance of unrecognized tax benefits Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Beginning balance Unrecognized Tax Benefits Additions for current year tax positions Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Additions for prior year tax positions Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Decreases related to lapse of applicable statute of limitation Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations Ending balance Goodwill And Other Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] With no related allowance recorded, Recorded investment Impaired Financing Receivable, with No Related Allowance, Recorded Investment With no related allowance recorded, Unpaid principal balance Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance With an allowance recorded, Recorded investment Impaired Financing Receivable, with Related Allowance, Recorded Investment With an allowance recorded, Unpaid principal balance Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance With an allowance recorded, Related allowance Impaired Financing Receivable, Related Allowance Summarized Quarterly Financial Information (Unaudited) Quarterly Financial Information [Text Block] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Restricted Stock Restricted Stock [Member] 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] Restricted Awards, beginning balance Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Restricted Awards, Granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Restricted Awards, Forfeited/Vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Restricted Awards, ending balance Average Market Price at Grant, Granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Restricted Stock or Unit Expense Restricted Stock or Unit Expense Unrecognized stock-based compensation expense Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Weighted average period in which the above amount is expected to be recognized Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Commitments And Contingencies Commitments and Contingencies Disclosure [Text Block] Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Expected dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Volatility factor Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate Expected life of option Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Condensed Balance Sheets Condensed Balance Sheet [Table Text Block] Condensed Statements Of Comprehensive Income Condensed Income Statement [Table Text Block] Condensed Statements Of Cash Flows Condensed Cash Flow Statement [Table Text Block] Derivative Instruments and Hedging Activities Disclosures [Table] Derivative Instruments and Hedging Activities Disclosures [Table] Derivative Instruments and Hedging Activities Disclosures [Line Items] Derivative Instruments and Hedging Activities Disclosures [Line Items] Loss on Fair Value Hedge Ineffectiveness Loss on Fair Value Hedge Ineffectiveness Notional Amount Derivative, Notional Amount Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Loans Receivable Loans Receivable [Member] Derivative assets Derivative Financial Instruments, Assets [Member] Derivative liabilities Derivative Financial Instruments, Liabilities [Member] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Other Income Other Income [Member] Other Expense Other Expense [Member] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Change in Fair Value Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments Deferred Tax Assets, Previously Securitized Loans Deferred Tax Assets Previously Securitized Loans Deferred Tax Assets Previously Securitized Loans Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Pensions Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Pensions Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Impairment LossesImpaired assets Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Impairment Losses Deferred Tax Assets, Unrealized Losses on Available-for-Sale Securities, Gross Deferred Tax Assets, Unrealized Losses on Available-for-Sale Securities, Gross Deferred Tax Assets, Goodwill and Intangible assets Deferred Tax Assets, Goodwill and Intangible Assets Deferred Tax Assets, Other Deferred Tax Assets, Other Total Deferred Tax Assets Deferred Tax Assets, Gross Deferred Tax Liabilities, Other Deferred Tax Liabilities, Other Total Deferred Tax Liabilities Deferred tax asset, net Schedule Of Assets And Liabilities Measured At Fair Value On A Recurring And Nonrecurring Basis Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Schedule Of Reconciliation Of Investment Securities Available For Sale Measured At Fair Value On A Recurring Basis Level 3 Assets Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Schedule Of Level 3 Financial Assets And Liabilities Measured On A Recurring Basis Fair Value Measurements, Nonrecurring [Table Text Block] Schedule Of OREO Measured And Reported At Fair Value Schedule of Real Estate Properties [Table Text Block] Schedule Of Estimates Of Fair Value Of Financial Instruments Fair Value, by Balance Sheet Grouping [Table Text Block] Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax Underfunded pension liability, deferred tax benefit Deferred Tax Assets Underfunded Pension Liability Deferred Tax Assets Underfunded Pension Liability Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax Schedule of Short-term Debt [Table] Schedule of Short-term Debt [Table] Short-term Debt, Type [Axis] Short-term Debt, Type [Axis] Short-term Debt, Type [Domain] Short-term Debt, Type [Domain] Investment Securities And One To Four Family Residential Property Loans Investment Securities And One To Four Family Residential Property Loans [Member] Investment Securities And One To Four Family Residential Property Loans [Member] Short-term Debt [Line Items] Short-term Debt [Line Items] FHLB stock purchased during year FederalHomeLoanBankStockHeldPurchasedDuringYear FederalHomeLoanBankStockPurchasedDuringYear Collateral pledged to the FHLB Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged Unused and available FHLB funds Federal Home Loan Bank, Advances, General Debt Obligations, Amount of Available, Unused Funds Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] 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 Measurement On Nonrecurring Basis Asset And Liabilities Value [Roll Forward] Fair Value Measurement On Nonrecurring Basis Asset And Liabilities Value [Roll Forward] Fair Value Measurement On Nonrecurring Basis Asset And Liabilities Value [Roll Forward] Beginning balance Fair Value Measurement On Nonrecurring Basis Asset And Liabilities Value Fair Value Measurement On Nonrecurring Basis Asset And Liabilities Value Loans classified as impaired during the period Carrying Value Of Impaired Loans Before Allocations Carrying Value Of Impaired Loans Before Allocations Specific valuation allowance allocations Allowance For Loan Losses On Impaired Loans During The Period Allowance For Loan Losses On Impaired Loans During The Period Fair Value Assets And Liabilities Measured On Nonrecurring Basis Assets And Liabilities Measured On Nonrecurring Basis (Additional) reduction in specific valuation allowance allocations (Additional) Reduction In Specific Valuation Allowance Allocations During Period (Additional) Reduction In Specific Valuation Allowance Allocations During Period Paydowns, payoffs, other activity Assets And Liabilities Paydowns, Payoffs and Other Assets And Liabilities Paydowns, Payoffs and Other Ending balance Options Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Options Outstanding, beginning balance Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options Options, Granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures Options, Exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Options, Forfeited Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Options Outstanding, ending balance Weighted-Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Weighted-Average Exercise Price, Outstanding, beginning balance Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price Weighted-Average Exercise Price, Granted Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Weighted-Average Exercise Price, Exercised Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Weighted-Average Exercise Price, Forfeited Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Weighted-Average Exercise Price, Outstanding, ending balance Options, Exercisable at end of year Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options Weighted-Average Exercise Price, Exercisable at end of year Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price Options Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Number of Shares Weighted-Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Weighted-Average Exercise Price, Vested during the year Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Weighted Average Grant Date Fair Value Weighted-Average Exercise Price, Forfeited during the year Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Weighted Average Grant Date Fair Value Proceeds from stock option exercises Intrinsic value of stock options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Stock-based compensation expense associated with stock options Allocated Share-based Compensation Expense Income tax benefit recognized related to stock-based compensation Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Related Party Transactions [Abstract] Loans and Leases Receivable Disclosure [Table] Loans and Leases Receivable Disclosure [Table] Unfunded Loan Commitment Unfunded Loan Commitment [Member] Loans and Leases Receivable Disclosure [Line Items] Loans and Leases Receivable Disclosure [Line Items] Unfunded commitments to certain non-executive officers and directors Loans and Leases Receivable, Related Parties Total principal additions Loans and Leases Receivable, Related Parties, Additions Total principal reductions Loans and Leases Receivable, Related Parties, Proceeds Schedule of Goodwill Schedule of Goodwill [Table Text Block] Schedule Of Core Deposit Intangibles Schedule of Finite-Lived Intangible Assets [Table Text Block] Schedule of Estimated Future Amortization Expense for Core Deposits Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Cash dividends declared Common Stock, Dividends, Per Share, Cash Paid Exercise of stock options Stock Issued During Period, Shares, Other Stock Issued During Period, Shares, Other Purchase of treasury shares Treasury Stock, Shares, Acquired Property, Plant and Equipment [Abstract] Summary Of Premises And Equipment Property, Plant and Equipment [Table Text Block] Scheduled Maturities Of Time Deposits Time Deposit Maturities [Table Text Block] Schedule of Defined Benefit Plans Disclosures [Table] Schedule of Defined Benefit Plans Disclosures [Table] Defined Benefit Plan, Asset Categories [Axis] Defined Benefit Plan, Asset Categories [Axis] Plan Asset Categories [Domain] Plan Asset Categories [Domain] Cash and Cash Equivalents Cash and Cash Equivalents [Member] Mutual funds/Investment funds Equity Funds [Member] Common stocks Corporate bonds US Treasury Securities [Member] Corporate bonds Alternative investments Hedge Funds [Member] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan, Fair Value of Plan Assets, Not Subject to Fair Value Hierarchy Defined Benefit Plan, Fair Value of Plan Assets, Not Subject to Fair Value Hierarchy Defined Benefit Plan, Fair Value of Plan Assets, Not Subject to Fair Value Hierarchy Total Defined Benefit Plan, Fair Value of Plan Assets Schedule Of Computation Of Basic And Diluted Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract] Preferred shares outstanding Preferred Stock, Shares Outstanding Summary Of Selected Quarterly Financial Information Quarterly Financial Information [Table Text Block] Regulatory Requirements And Capital Ratios Regulatory Capital Requirements under Banking Regulations [Text Block] Preferred Stock Preferred Stock [Text Block] Gross carrying amount Finite-Lived Core Deposits, Gross Accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Total Finite-Lived Intangible Assets, Net Finite-lived Intangible Assets [Roll Forward] Finite-lived Intangible Assets [Roll Forward] Beginning balance Amortization expense Ending balance Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Defined Benefit Pension Plans Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Combined Federal And State Income Tax Rate Combined Federal And State Income Tax Rate Combined Federal And State Income Tax Rate CombinedFederalandStateDeferredTaxRate CombinedFederalandStateDeferredTaxRate CombinedFederalandStateDeferredTaxRate Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax [Roll Forward] Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax [Roll Forward] Beginning balance Accumulated Other Comprehensive Income (Loss), Net of Tax Other comprehensive income before reclassifications Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Amounts reclassified from other comprehensive loss Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Other Comprehensive Income (Loss), Net of Tax Ending balance Construction Loan Construction Loan Gross realized gains Available-for-sale Securities, Gross Realized Gains Gross realized losses Available-for-sale Securities, Gross Realized Losses Investment security gains (losses) Available-for-sale Securities, Gross Realized Gain (Loss) Target Allocation Defined Benefit Plan, Plan Assets, Target Allocation, Percentage Allowable-Allocation Range, Minimum Defined Benefit Plan, Target Allocation Percentage Percentage of Plan Assets Defined Benefit Plan, Actual Plan Asset Allocations Investments Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of Amounts Reclassified from Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Goodwill [Roll Forward] Goodwill [Roll Forward] Beginning balance Goodwill Goodwill, Purchase Accounting Adjustments Goodwill, Purchase Accounting Adjustments Ending balance Long-Term Debt Schedule of Maturities of Long-term Debt [Table Text Block] Securities Available-for-Sale, Due in one year or less, Cost Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis Securities Available-for-Sale, Due after one year through five years, Cost Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis Securities Available-for-Sale, Due after five years through ten years, Cost Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis Securities Available-for-Sale, Due after ten years, Cost Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis Securities Available-for-Sale, Cost, Total Available-for-sale Debt Securities, Amortized Cost Basis Securities Available-for-Sale, Due in one year or less, Estimated Fair Value Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value Securities Available-for-Sale, Due after one year through five years, Estimated Fair Value Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value Securities Available-for-Sale, Due after five years through ten years, Estimated Fair Value Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value Securities Available-for-Sale, Due after ten years, Estimated Fair Value Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value Securities Available-for-Sale, Estimated Fair Value, Total Available-for-sale Securities, Debt Securities Securities Held-to-Maturity, Due after ten years, Cost Held-to-maturity Securities, Debt Maturities, after Ten Years, Net Carrying Amount Securities Held-to-Maturity, Cost, Total Securities Held-to-Maturity, Due after ten years, Estimated Fair Value Held-to-maturity Securities, Debt Maturities, after Ten Years, Fair Value Securities held-to-maturity, Estimated Fair Value Fair Value Measurements Fair Value Disclosures [Text Block] 2017 Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months 2018 Defined Benefit Plan, Expected Future Benefit Payment, Year Two 2019 Defined Benefit Plan, Expected Future Benefit Payment, Year Three 2020 Defined Benefit Plan, Expected Future Benefit Payment, Year Four 2021 Defined Benefit Plan, Expected Future Benefit Payment, Year Five 2022 through 2026 Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Land Land [Member] Buildings and improvements Building and Building Improvements [Member] Equipment Equipment [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Property, plant and equipment, gross Property, Plant and Equipment, Gross Less: accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property, Plant and Equipment, Net, Total Estimated Useful Life Property, Plant and Equipment, Useful Life 2018 Time Deposit Maturities, Next Twelve Months 2019 Time Deposit Maturities, Year Two 2020 Time Deposit Maturities, Year Three 2021 Time Deposit Maturities, Year Four 2022 Time Deposit Maturities, Year Five Over five years Time Deposit Maturities, after Year Five Time Deposits, Total Time Deposits Offsetting Assets [Table] Offsetting Assets [Table] Customer Counterparties Loan Interest Rate Swap Assets Customer Counterparties Loan Interest Rate Swap Assets [Member] Customer Counterparties Loan Interest Rate Swap Assets [Member] Financial Institution Counterparties Loan Interest Rate Swap Asset Financial Institution Counterparties Loan Interest Rate Swap Asset [Member] Financial Institution Counterparties Loan Interest Rate Swap Asset [Member] Designated as Hedging Instrument Offsetting Assets [Line Items] Offsetting Assets [Line Items] Gross Amounts of Recognized Assets Derivative Asset, Fair Value, Gross Asset Derivative Asset, Fair Value of Collateral Derivative Asset, Fair Value of Collateral Derivative Asset, Fair Value, Amount Not Offset Against Collateral Derivative Asset, Fair Value, Amount Not Offset Against Collateral Derivative Asset, Fair Value, Amount Offset Against Collateral Derivative Asset, Fair Value, Amount Offset Against Collateral Fair Value Of Derivative Instruments Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Change In Fair Value Of Derivative Instruments Summary Of The Change In Fair Value Of Derivative Instruments [Table Text Block] Summary Of The Change In Fair Value Of Derivative Instruments [Table Text Block] Offsetting Assets Offsetting Assets [Table Text Block] Offsetting Liabilities Offsetting Liabilities [Table Text Block] Reserve balance Restricted Cash and Investments Amortization and accretion Accretion (Amortization) of Discounts and Premiums, Investments Provision for loan losses Depreciation of premises and equipment Net periodic employee benefit cost Realized investment securities gains Net investment securities impairment losses Net Investment Securities Impairment Losses Net Investment Securities Impairment Losses Stock-based compensation expense Excess Tax Benefit from Share-based Compensation, Operating Activities Excess Tax Benefit from Share-based Compensation, Operating Activities Increase in value of bank-owned life insurance Life Insurance, Corporate or Bank Owned, Change in Value Proceeds from life insurance Proceeds from Life Insurance Policy Originations of loans held for sale Payments for Origination of Mortgage Loans Held-for-sale Proceeds from loans held for sale Proceeds from Sale of Mortgage Loans Held-for-sale Gain on sale of loans Gain (Loss) on Sales of Loans, Net Gain on sale of insurance division Change in accrued interest receivable Increase (Decrease) in Accrued Interest Receivable, Net Proceeds from sales of securities available-for-sale Proceeds from maturities and calls of securities available-for-sale Proceeds from Maturities, Prepayments and Calls of Available-for-sale Securities Proceeds from maturities and calls of securities held-to-maturity Proceeds from Maturities, Prepayments and Calls of Held-to-maturity Securities Purchases of securities available-for-sale Payments to Acquire Available-for-sale Securities Purchases of securities held-to-maturity Payments to Acquire Held-to-maturity Securities Net increase in loans Payments for (Proceeds from) Loans and Leases Purchases of premises and equipment Payments to Acquire Property, Plant, and Equipment Disposals of premises and equipment Gain (Loss) on Disposition of Property Plant Equipment Proceeds from sale of CityInsurance Proceeds from Divestiture of Businesses Acquisition of American Founders Bank, Inc., including cash acquired of $561 Payments to Acquire Businesses, Net of Cash Acquired Net Cash Used in Investing Activities Net (decrease) increase in noninterest-bearing deposits Net Change Noninterest-bearing Deposits, Domestic Net increase (decrease) in interest-bearing deposits Proceeds from (Payments for) in Interest-bearing Deposits in Banks Net increase in short-term borrowings Proceeds from (Repayments of) Short-term Debt Proceeds from exercise of stock options Proceeds from Stock Options Exercised, net of tax benefit Proceeds from Stock Options Exercised, net of tax benefit Net Cash Provided by Financing Activities (Decrease) Increase in Cash and Cash Equivalents Summary of Significant Accounting and Reporting Policies Basis of Accounting, Policy [Policy Text Block] Principles Of Consolidation Consolidation, Policy [Policy Text Block] Cash and Due from Banks Cash and Cash Equivalents, Policy [Policy Text Block] Securities Marketable Securities, Policy [Policy Text Block]