Amendment Flag Current Fiscal Year End Date Document Period End Date Entity [Domain] Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Entity Public Float Entity Registrant Name Entity Central Index Key Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus Legal Entity [Axis] Document Type Investment Issuer [Axis] Investment Issuer [Domain] Award Type [Axis] Unrealized Gains SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract] Accounts, Notes, Loans and Financing Receivable by Receivable Type [Axis] Accounts, Notes, Loans and Financing Receivable by Receivable Type [Axis] Accrued Interest Payable Accounts Payable, Interest-bearing Accounts, Notes, Loans and Financing Receivable [Line Items] Amortization of premiums on securities, net Accretion (Amortization) of Discounts and Premiums, Investments Dividends receivable from subsidiary bank Accumulated Other Comprehensive Income (Loss) [Member] Unrealized loss on pension plans and other benefit, opening balance Unrealized loss on pension plans and other benefit, closing balance Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax Summary of accumulated other comprehensive income balance [Abstract] Unrealized gains on securities available for sale, opening balance Unrealized gains on securities available for sale, closing balance Less accumulated depreciation and amortization Total, Accumulated other comprehensive income, opening balance Total, Accumulated other comprehensive income, closing balance Accumulated other comprehensive (loss) income Acquired Finite-Lived Intangible Assets [Line Items] Balance Acquired Additional-paid-in capital Additional paid-in Capital [Member] Adjustments to reconcile net income to net cash provided by operating activities: Restricted stock awards FEDERAL HOME LOAN BANK TERM ADVANCES AND OVERNIGHT ADVANCES [Abstract] Allowance for loan losses by portfolio segment Amortization of intangible assets Aggregate amortization expense Securities or Other Assets Sold under Agreements to Repurchase, Maturity Periods [Axis] Securities or Other Assets Sold under Agreements to Repurchase [Axis] ASSETS ASSETS Assets [Abstract] Weighted Average Rate (in hundredths) Assets Sold under Agreements to Repurchase, Interest Rate Repurchase Liability Assets Sold under Agreements to Repurchase [Line Items] Total assets Segment assets Assets Financial Assets [Abstract] Assets, Fair Value Disclosure [Abstract] Assets under management, carrying amount Assets under Management, Carrying Amount Assets Sold under Agreements to Repurchase, Maturity Period [Domain] Fair Value Assets, Fair Value Disclosure, Nonrecurring Assets Sold under Agreements to Repurchase, Type [Domain] Total available for sale securities Estimated Fair Value Available-for-sale Securities, Maturities - Cost [Abstract] Available-for-sale Securities, Debt Maturities [Abstract] After One, But Within Five Years Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value Within One Year Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value Securities available for sale, at estimated fair value Securities available for sale After Ten Years Within One Year After Five, But Within Ten Years After Five, But Within Ten Years Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value Amortized cost and estimated fair value of securities available for sale Fair Value, Total Unrealized Losses Amortized Cost, Total Available-for-sale Securities, Debt Maturities, Amortized Cost Basis After Ten Years Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value After One, But Within Five Years Amortized Cost Available-for-sale Securities, Gross Realized Gain (Loss) [Abstract] Gross losses Gross gains Bank owned life insurance Income from bank owned life insurance Income from bank owned life insurance Bank Owned Life Insurance Income BASIS OF PRESENTATION Building [Member] Merger related expenses Total Capital (to Risk Weighted Assets) [Abstract] Total Capital Capital to Risk Weighted Assets (in hundredths) Capital to Risk Weighted Assets Capital Required for Capital Adequacy to Risk Weighted Assets (in hundredths) Capital Required for Capital Adequacy to Risk Weighted Assets Capital Required to be Well Capitalized to Risk Weighted Assets (in hundredths) Capital Required to be Well Capitalized to Risk Weighted Assets Capital Required for Capital Adequacy Capital Required to be Well Capitalized Carrying Amount [Member] Carrying Value [Member] Cash [Member] Total cash and cash equivalents Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Cash and Cash Equivalents, at Carrying Value Cash received Fort Orange Financial Corp. acquisition CASH AND CASH EQUIVALENTS Cash and due from financial institution Cash on deposit with subsidiary bank Net decrease in cash and cash equivalents (Decrease) increase in cash and cash equivalents Cash and Cash Equivalents [Member] Supplemental disclosure of non-cash activity: Summary of changes in contractually required principal and interest on loans acquired Contractual cash flows not expected to be collected (nonaccretable discount), opening balance Contractual cash flows not expected to be collected (nonaccretable discount), closing balance Certain Loans Acquired in Transfer, Nonaccretable Difference Interest component of expected cash flows (accretable yield), opening balance Interest component of expected cash flows (accretable yield, closing balance Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Interest component of expected cash flows (accretable yield), income accretion Cash flows expected to be collected, opening balance Cash flows expected to be collected, closing balance Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Cash Flows Expected to be Collected at Acquisition Fair value of loans acquired with deteriorating credit quality, opening balance Fair value of loans acquired with deteriorating credit quality, closing balance Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value Contractually required principal and interest, opening balance Contractually required principal and interest, closing balance Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Contractually Required Payments Receivable at Acquisition Collateralized Mortgage obligations [Member] Collateralized Mortgage Obligations [Member] Collateralized Mortgage obligations [Member] Construction [Member] Construction [Member] Construction [Member] Other [Member] Other [Member] Other [Member] COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] COMMITMENTS AND CONTINGENCIES [Abstract] Commitments to make loans [Member] Commitments to Extend Credit [Member] Common Stock [Member] Common stock, $.01 par value per share, 10,000,000 shares authorized; 5,310,076 issued at December 31, 2012 and December 31, 2011 Common stock, shares issued (in shares) Cash dividends declared (in dollars per share) Common stock, par value (in dollars per share) Common stock, shares authorized (in shares) PENSION PLAN AND OTHER BENEFIT PLANS [Abstract] Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] Deferred tax assets: Components of Deferred Tax Assets and Liabilities [Abstract] Deferred tax liabilities: Total other comprehensive (loss) income Comprehensive Income (Loss), Net of Tax, Attributable to Parent ACCUMULATED OTHER COMPREHENSIVE INCOME OR LOSS COMPREHENSIVE INCOME Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest LOAN CONCENTRATIONS Condensed Financial Statements, Captions [Line Items] PARENT COMPANY FINANCIAL INFORMATION Condensed Financial Information of Parent Company Only Disclosure [Text Block] PARENT COMPANY FINANCIAL INFORMATION [Abstract] ORGANIZATION Projects in Progress [Member] Other Direct Consumer Loans [Member] Consumer loans [Member] Consumer Loans [Member] Consumer Loan [Member] Credit Cards [Member] Credit cards [Member] Maturities of time deposits in denominations of $100,000 or more [Abstract] 3 months or less Over 3 through 6 months Over 6 through 12 months Over 12 months Core deposit intangibles [Member] Consolidated Total [Member] Corporate bonds and notes [Member] Depreciation Expense Cost of Goods and Services Sold, Depreciation State Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Current Income Tax Expense (Benefit), Total Current Income Tax Expense (Benefit) Federal Other customer relationship intangibles [Member] Doubtful [Member] Federal Home Loan Bank, Advances [Line Items] Debt Instrument [Line Items] Schedule of Federal Home Loan Bank Advances [Table] Schedule of Long-term Debt Instruments [Table] Debt Security [Axis] Purchase accounting adjustment - fixed assets Title of Individual [Axis] Expense related to restricted stock units for directors' deferred compensation plan Total gross deferred tax liabilities Deferred Tax Liabilities, Gross Deferred expense Net deferred tax asset Deferred Tax Assets, Net Total gross deferred tax assets Deferred Tax Assets, Gross Trust preferred impairment write-down Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Impairment Losses Other Accrual for employee benefit plans Accounting for defined benefit pension and other benefit plans Depreciation Allowance for loan losses Other Deferred Tax Liabilities, Other Prepaid pension Deferred loan fees and costs Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Actual return on plan assets Change in plan assets [Roll Forward] Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] Total recognized in net benefit cost and other comprehensive income (loss) (before tax effect) Accumulated benefit obligation Defined Benefit Plan, Accumulated Benefit Obligation Assumed rate of future compensation increase (in hundredths) Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase Amortization of prior service cost Benefits paid Defined Benefit Plan, Benefits Paid 2015 Defined Benefit Plan, Expected Future Benefit Payments, Year Three Change in Projected Benefit Obligation [Roll Forward] Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] Assumed rate of future compensation increase (in hundredths) Prior service cost recognition Total service and interest cost Defined Benefit Plan, Effect of One Percentage Point Decrease on Service and Interest Cost Components Total recognized in other comprehensive income (loss) (before tax effect) Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Gain (Loss), before Tax Target Allocations - Minimum (in hundredths) Defined Benefit Plan, Target Plan Asset Allocations Range Minimum Actuarial loss Defined Benefit Plan, Actuarial Gain (Loss) Estimated Future Employer Contributions [Abstract] Defined Benefit Plan, Estimated Future Employer Contributions [Abstract] Amounts expected to be recognized in net periodic cost during next fiscal year [Abstract] Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year [Abstract] Loss recognition Defined Benefit Plan, Amortization of Net Gains (Losses) 2014 Defined Benefit Plan, Expected Future Benefit Payments, Year Two Other changes in plan assets and benefit obligations recognized in other comprehensive Income [Abstract] Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract] Expected long-term rate of return on assets (in hundredths) Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets 2017 Defined Benefit Plan, Expected Future Benefit Payments, Year Five Total before tax effects Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax Employer contributions Defined Benefit Plan, Contributions by Employer Net actuarial loss Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Gains (Losses), before Tax Discount Rate (in hundredths) Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate Target Allocations - Maximum (in hundredths) Defined Benefit Plan, Target Plan Asset Allocations Range Maximum Recognized actuarial loss Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments Benefit Obligation Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation 2016 Defined Benefit Plan, Expected Future Benefit Payments, Year Four Plan Assets - Target Allocations [Abstract] Defined Benefit Plan, Assets, Target Allocations [Abstract] Discount Rate (in hundredths) Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate 2013 Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months Amortization of net loss Defined Benefit Plan, Amortization of Gains (Losses) Defined Benefit Plan Disclosure [Line Items] Participant Contributions Defined Benefit Plan, Contributions by Plan Participants Accumulated Other Comprehensive Income (Loss) [Abstract] Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax [Abstract] Benefit Obligation, beginning balance Benefit obligation, ending balance Defined Benefit Plan, Benefit Obligation Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] 2018-2022 Assumptions Used in Determining Benefit Obligation [Abstract] Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] Future Expected Benefit Payments [Abstract] Defined Benefit Plan, Expected Future Benefit Payments, Fiscal Year Maturity [Abstract] Funded status [Abstract] Defined Benefit Plan, Funded Status of Plan [Abstract] Expected return on plan assets Defined Benefit Plan, Expected Return on Plan Assets Health care cost trend: Initial (in hundredths) Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year Year ultimate cost trend reached Total service and interest cost Defined Benefit Plans and Other Postretirement Benefit Plans [Axis] Percentage of Plan Assets (in hundredths) Defined Benefit Plan, Actual Plan Asset Allocations Interest cost on projected benefit obligation Defined Benefit Plan, Interest Cost Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] Fair value of plan assets, beginning balance Fair value of plan assets, ending balance Fair Value of Plan Assets Net periodic cost, Total Defined Benefit Plan, Net Periodic Benefit Cost Effect of 1% Change in health care trend rate [Abstract] Defined Benefit Plan, Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rates [Abstract] Service cost, benefits earned during the year Defined Benefit Plan, Service Cost Funded (under funded) status Defined Benefit Plans and Other Postretirement Benefit Plans [Domain] Defined contribution plan expense Defined Contribution Plan, Cost Recognized Benefit Obligation Net periodic benefit cost [Abstract] Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] Estimated Future Employer Contributions in Next Fiscal Year Health care cost trend: Ultimate (in hundredths) Defined Benefit Plan, Ultimate Health Care Cost Trend Rate Fair Value Measurement of Plan Assets [Abstract] Defined Benefit Plan, Asset Categories [Axis] Non-interest-bearing demand deposits Prior service cost DEPOSITS Deposit Liabilities Disclosures [Text Block] Total deposits Deposits Interest-bearing demand deposits Deposits: DEPOSITS [Abstract] Deposits [Abstract] Insured money market accounts Savings Deposits Deposits, by Type [Abstract] Depreciation and amortization of fixed assets Deteriorated Loans Transferred in [Abstract] Director [Member] STOCK COMPENSATION Disclosure of Compensation Related Costs, Share-based Payments [Text Block] SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE [Abstract] STOCK COMPENSATION [Abstract] Cash dividends declared Dividends, Common Stock, Cash Dividends payable Basic and diluted earnings per share (in dollars per share) EARNINGS PER COMMON SHARE Period for Recognition Unrecognized compensation cost related to nonvested Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Share-based Awards Other than Options Furniture and equipment expenses Equipment and furniture[Member] Equity Method Investments Equity in undistributed earnings Proceeds from Equity Method Investment, Dividends or Distributions Equity Component [Domain] Equity Method Investee, Name [Domain] Mutual Funds [Member] Corporate stocks [Member] Fair Value [Member] Estimated Fair Value [Member] Fair Value by Measurement Frequency [Axis] Fair Value by Asset Class [Domain] Valuation Techniques Fair Value, Hierarchy [Axis] Recurring [Member] Fair Value, Measurement Frequency [Domain] Nonrecurring fair value measurement , Valuation Techniques Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Asset Class [Axis] Off-balance sheet contractual amounts of financial instruments Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Included in other comprehensive income Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) FAIR VALUES [Abstract] FAIR VALUES Non-recurring [Member] Trust Preferred Securities [Rollforward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Summary of assets and liabilities measured at fair value on a non-recurring basis Fair value, assets and liabilities measured on recurring basis [Abstract] Carrying value and estimated fair value of financial instruments Fair Value, Disclosure Item Amounts [Domain] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping, Disclosure Item Amounts [Axis] Significant Unobservable Inputs (Level 3) [Member] Significant Unobservable Inputs (Level 3) [Member] Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] Significant Other Observable Inputs (Level 2) [Member] Significant Other Observable Inputs (Level 2) [Member] Off-balance sheet risks [Line Items] Transfers in and/or out of Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net Beginning balance Ending balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged Federal Home Loan Bank and Federal Reserve Bank Stock, at cost Federal Home Loan Bank Stock and Federal Reserve Bank Stock FEDERAL HOME LOAN BANK TERM ADVANCES AND OVERNIGHT ADVANCES Federal Home Loan Bank Advances, Disclosure [Text Block] FDIC insurance Federal Home Loan Bank, Advances, General Debt Obligations, Maximum Amount Available Weighted Average Interest Rate (in hundredths) Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Weighted Average Interest Rate Federal Home Loan Bank term advances Wealth management group fee income Service charges on deposit accounts LOANS HELD FOR SALE Financial liabilities [Abstract] Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Financial Assets [Abstract] Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Financial Instruments Owned and Pledged as Collateral by Type [Axis] Financial Instruments Owned and Pledged as Collateral, Type [Domain] Financial Instruments Owned and Pledged as Collateral [Line Items] Financial Instruments [Axis] Financial Instruments Owned and Pledged as Collateral [Table] Financing Receivable, Recorded Investment, Past Due [Line Items] Recorded investment in troubled debt restructurings Financing Receivable, Modifications, Subsequent Default, Recorded Investment Post-Modification outstanding recorded investment Pre-Modification outstanding recorded investment Financing Receivable, Modifications [Line Items] Loans Past Due Over 90 Days Still Accruing Non-Accrual Acquired with deteriorated credit quality Loans Acquired with deteriorated credit quality Financing Receivable, Allowance for Credit Losses [Line Items] Individually evaluated for impairment - Loan allowances allocated Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment Financing Receivable, Recorded Investment [Line Items] Allowance for loan losses, by portfolio segment [Roll Forward] 30-59 Days Past Due Financing Receivable Information by Credit Quality Indicator [Axis] Troubled debt restructuring loan amount modified Charge Offs: Financing Receivable, Allowance for Credit Losses, Write-downs Financing Receivable, Recorded Investment, Class of Financing Receivable [Domain] Aging of the recorded investment in loans past due [Abstract] Write down of OREO Greater than 89 Days Past Due Financing Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due 60-89 Days Past Due Recoveries: Financing Receivable, Allowance for Credit Losses, Recovery Financing Receivable, Impaired [Line Items] Number of Loans Loans individually evaluated for impairment Financing Receivable, Individually Evaluated for Impairment Financing Receivable, by Credit Quality Indicator [Domain] Loans Not Past Due Financing Receivable, Recorded Investment, Current Beginning balance: Ending balance Financing Receivable, Allowance for Credit Losses Risk category of the recorded investment of loans by class of loans Financing Receivable, Recorded Investment, by Class of Financing Receivable [Axis] Total Past Due Financing Receivable, Recorded Investment, Past Due Loans collectively evaluated for impairment Financing Receivable, Collectively Evaluated for Impairment Collectively evaluated for impairment - Loan allowance allocated Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment Finite-lived intangible asset, useful life Finite-Lived Intangible Asset, Useful Life Finite-Lived Intangible Assets, Major Class Name [Domain] 2017 Intangible assets with definite useful lives - from business purchases Finite-Lived Intangible Assets, Gross Finite-Lived Intangible Assets [Line items] 2015 Finite-lived intangible assets, future amortization expense [Abstract] Acquired Finite-Lived Intangible Assets by Major Class [Axis] Accumulated Amortization Finite-lived intangible assets, net [Abstract] 2018 and thereafter 2013 2016 2014 Total Finite-Lived Intangible Assets, Net Other real estate owned expenses Foreign bonds, notes & debentures [Member] Proceeds from sales and calls of securities resulting in gains or losses Net gains on securities transactions Net gain on securities transactions Gain (Loss) on Sale of Securities, Net Gains on sales of loans held for sale, net Net gain on sales of loans held for sale Gain (Loss) on Sales of Loans, Net Net losses (gain) on sale of other real estate owned Gains (Losses) on Sales of Other Real Estate Goodwill Beginning of year Ending of year GOODWILL AND INTANGIBLE ASSETS GOODWILL AND INTANGIBLE ASSETS Goodwill and Intangible Assets Disclosure [Text Block] Adjustment of Acquired goodwill Acquired goodwill Goodwill [Roll Forward] GOODWILL AND INTANGIBLE ASSETS [Abstract] Intangible Assets [Abstract] After One, But Within Five Years Held-to-maturity Securities, Debt Maturities, after One Through Five Years, Net Carrying Amount Securities held to maturity, estimated fair value of $6,421,486 at December 31, 2012 and $9,175,956 at December 31, 2011 Securities held to maturity Amortized Cost After Five, But Within Ten Years Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount Within One Year Held-to-maturity Securities, Debt Maturities, Next Twelve Months, Fair Value After Ten Years Held-to-maturity Securities, Debt Maturities, after Ten Years, Fair Value After One, But Within Five Years Held-to-maturity Securities, Debt Maturities, Year Two Through Five, Fair Value After Five, But Within Ten Years Held-to-maturity Securities, Debt Maturities, Year Six Through Ten, Fair Value After Ten Years Held-to-maturity Securities, Debt Maturities, after Ten Years, Net Carrying Amount Amortized cost and estimated fair value of securities held to maturity Amortized Cost Total Held-to-maturity Securities, Debt Maturities, Net Carrying Amount Within One Year Held-to-maturity Securities, Debt Maturities, within One Year, Net Carrying Amount Fair Value, Total Held-to-maturity Securities, Debt Maturities, Fair Value Securities held to maturity, estimated fair value Estimated Fair Value Interest Income, Accrual Method [Abstract] Impaired Financing Receivable, Interest Income, Accrual Method [Abstract] With No Related Allowance, Interest Income, Accrual Method Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method With Related Allowance, Average Recorded Investment Impaired Financing Receivable, with Related Allowance, Average Recorded Investment Average Recorded Investment [Abstract] Unpaid Principal Balance [Abstract] Summary of impaired financing receivables With Related Allowance, Recorded Investment Impaired Financing Receivable, with Related Allowance, Recorded Investment With Related Allowance, Interest Income, Accrual Method Average Recorded Investment, Total Impaired Financing Receivable, Average Recorded Investment With No Related Allowance, Unpaid Principal Balance Unpaid Principal Balance, Total Impaired Financing Receivable, Unpaid Principal Balance Recorded Investment, Total With No Related Allowance, Recorded Investment Impaired Financing Receivable, with No Related Allowance, Recorded Investment Impaired loan valuation allowance Allowance for Loan Losses Allocated With No Related Allowance, Average Recorded Investment With Related Allowance, Unpaid Principal Balance Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance Interest Income, Accrual Method, Total Impaired Financing Receivable, Interest Income, Accrual Method Recorded Investment [Abstract] Impaired Financing Receivable, Recorded Investment [Abstract] Net impairment loss recognized on investment securities Income before income tax Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest CONSOLIDATED STATEMENTS OF INCOME [Abstract] Statement of Income [Abstract] INCOME TAXES Income Tax Disclosure [Text Block] INCOME TAXES [Abstract] Income before income tax expense Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Equity in undistributed earnings Income tax expense Actual income tax expense Income tax expense (benefit) Tax computed at statutory rate Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract] Dividend exclusion Income Tax Reconciliation, Deductions, Dividends Nondeductible interest expense Tax-exempt interest Income Tax Reconciliation, Tax Exempt Income State taxes, net of Federal impact INCOME TAXES Income Taxes Other items, net Net increase in demand deposits, NOW accounts, savings accounts, and insured money market accounts Change in dividend receivable Increase (Decrease) in Dividends Receivable Decrease(increase) in other assets Change in other assets Increase (Decrease) in Other Operating Assets Decrease in accrued interest payable Change in other liabilities Net decrease in time deposits and individual retirement accounts Data processing expense Other intangible assets, net Accrued interest payable Interest and Dividend Income: Loans, including fees Interest and Dividend Income Total interest expense Interest Expense Total interest and dividend income Interest and Dividend Income, Operating Interest Expense: Borrowed funds Interest Expense, Borrowings Deposits Interest Expense, Deposits Interest expense on time deposits Interest Expense, Time Deposits Interest-bearing deposits Net interest income Net interest income Interest Income (Expense), Net Securities sold under agreements to repurchase Tax exempt securities Net interest income after provision for loan losses Interest Income (Expense), after Provision for Loan Loss Accrued interest receivable Interest-bearing Interest Interest-bearing deposits in other financial institutions Taxable securities Investment Income, Interest and Dividend Investment Income, Interest and Dividend [Abstract] SECURITIES Investment Income, Categories [Domain] Investment in subsidiary Interest and dividend income on securities Amortized cost and estimated fair value of debt securities by contractual maturity Investments Classified by Contractual Maturity Date [Table Text Block] SECURITIES Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] SECURITIES [Abstract] Federal Home Loan Bank, Advances, Maturity Date [Domain] Long-term Debt, Type [Domain] Federal Home Loan by Maturity [Axis] Long-term Debt, Type [Axis] Land [Member] Leasehold Improvements [Member] Leverage Ratios [Abstract] Total liabilities Liabilities LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities and shareholders' equity: [Abstract] Total liabilities and shareholders' equity Liabilities and Equity BANK OWNED LIFE INSURANCE Loan expense Loans individually evaluated for impairment [Abstract] LOANS AND ALLOWANCE FOR LOAN LOSSES [Abstract] ALLOWANCE FOR LOAN LOSSES Allowance for loan losses Total ending allowance balance Loans and Leases Receivable, Allowance Loans, net of deferred origination fees and costs, and unearned income Loans and leases receivable Loans held for sale Residential mortgages held for sale Loans pledged as collateral Loans Pledged as Collateral Composition of loan portfolio [Abstract] OTHER REAL ESTATE Loans, net Net loans Total Impaired Loan, Fair Value LOANS LOANS AND ALLOWANCE FOR LOAN LOSSES Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Trust beneficiaries seeking aggregate damages, maximum Major Types of Debt Securities [Domain] Schedule of Available-for-sale Securities, Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Domain] TRADING ASSETS Marketing and advertising expense Maturities of Time Deposits [Abstract] After 90 days but within one year [Member] Maximum [Member] Minimum [Member] Mortgage-backed securities, residential Non-Performing [Member] CASH FLOWS FROM FINANCING ACTIVITIES: Cash flow from financing activities [Abstract] Net cash used by investing activities Net Cash Provided by (Used in) Investing Activities Net cash provided (used) by financing activities Net Cash Provided by (Used in) Financing Activities CASH FLOWS FROM INVESTING ACTIVITIES: Cash flow from investing activities: CASH FLOWS FROM OPERATING ACTIVITIES: Cash flows from operating activities: [Abstract] Net income Net income Net income Net income Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities ADOPTION OF NEW ACCOUNTING STANDARDS Non-interest-bearing Other Noninterest Income, Other Operating Income Other operating income: Other operating expenses: Total other operating income Other operating income Noninterest Income Total other operating expenses Other operating expenses Noninterest Expense Related Party Loans - beginning of year Related Party Loans - end of year Notes Receivable, Related Parties Total ending loans balance Loans Total Financing Receivable, Net Number of operating segments Number of Operating Segments Net occupancy expenses Equipment and furniture [Member] 2018 and thereafter Operating Leases, Future Minimum Payments, Due Thereafter Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] Operating Expenses Operating Expenses Operating Leases, Rent Expense 2015 Operating Leases, Future Minimum Payments, Due in Three Years 2014 Operating Leases, Future Minimum Payments, Due in Two Years 2013 Operating Leases, Future Minimum Payments Due, Next Twelve Months 2016 Operating Leases, Future Minimum Payments, Due in Four Years 2017 Operating Leases, Future Minimum Payments, Due in Five Years Operating Lease Commitments Total Operating Leases, Future Minimum Payments Due Other comprehensive income Other assets Other Assets Other than temporary impairment credit losses recognized in earnings [Roll Forward] Unrealized gains on securities available for sale, Current Period Change Beginning balance Ending balance Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held Other than temporary impairment recognized in other comprehensive income for securities available for sale Other than Temporary Impairment Losses, Investments, Portion in Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent, Available-for-sale Securities TPREF Funding II, Ltd. (Class B), Qualitative Disclosures, Key Performance Indicator [Abstract] Change in unrealized gains on securities available for sale for which a portion of an other-than-temporary impairment has been recognized in earnings, net of reclassification Other than Temporary Impairment Losses, Investments, Portion in Other Comprehensive Income (Loss), before Tax, Including Portion Attributable to Noncontrolling Interest, Available-for-sale Securities Amounts realized for securities sold during the period Executive Supplemental Pension Plan [Member] Net of tax amount Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax Reclassification adjustment gains realized in net income Less: Tax effect Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax Other than temporary impairment recognized in other comprehensive income for securities held-to-maturity Roll forward of the cumulative credit losses recognized in earnings Amounts related to credit loss for which an other-than-temporary impairment was not previously recognized Net actuarial loss(gain) Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, before Tax Net unrealized gains Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax Reductions for increase in cash flows expected to be collected that are recognized over the remaining life of the security Amortization of prior service cost Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Benefit Cost, before Tax Amounts related to securities for which the company intends to sell or that it will be more likely than not that the company will be required to sell prior to recovery of amortized cost basis Change in funded status of defined benefit pension plan and other benefit plans: Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, before Reclassification Adjustments, Tax [Abstract] Reclassification adjustment for amortization of net actuarial loss Reclassification adjustment for amortization of prior service costs Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Arising During Period, before Tax ACCUMULATED OTHER COMPREHENSIVE INCOME OR LOSS [Abstract] Other comprehensive income Other Comprehensive Income (Loss), Net of Tax [Abstract] Total before tax effect Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Net of Tax Unrealized holding gains on securities available for sale Obligations of taxable states and political subdivisions [Member] Other Debt Obligations [Member] Recognized loss Other Other Noninterest Expense Other liabilities Other income Total Other real estate owned, net OREO - Other real estate owned gross Other Postretirement Benefit Plans, Defined Benefit [Member] Postretirement Benefit Plan [Member] Total, Current Period Change Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Less: Tax effect Other Comprehensive Income (Loss), Available-for-sale Securities, Tax, Portion Attributable to Parent Net of tax amount Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Unrealized loss on pension plans and other benefit plans, Current Period Change Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax, Portion Attributable to Parent Performing [Member] Recorded investment in loans past due Pass [Member] Parent Company [Member] Purchase of trading assets Payments to Acquire Trading Securities Held-for-investment Loans originated and held for sale Payments for Origination and Purchases of Loans Held-for-sale Net increase in loans Payments for (Proceeds from) Loans and Leases Purchase of treasury stock Payments for Repurchase of Common Stock Cash dividends paid Payments of Dividends Purchases of premises and equipment Payments to Acquire Property, Plant, and Equipment Purchases of securities available for sale Payments to Acquire Available-for-sale Securities Cash paid Fort Orange Financial Corp. acquisition Payments to Acquire Businesses, Gross Cash paid Fort Orange Financial Corp. acquisition Payments to Acquire Equity Method Investments Cash dividends paid Payments of Ordinary Dividends, Common Stock Purchase of Federal Home Loan Bank and Federal Reserve Bank stock Payments to Acquire Federal Reserve Stock Purchases of securities held to maturity Payments to Acquire Held-to-maturity Securities Pension Plans, Defined Benefit [Member] Pension Plan [Member] PENSION PLAN AND OTHER BENEFIT PLANS Pension and Other Postretirement Benefits Disclosure [Text Block] POSTRETIREMENT BENEFITS Plan Name [Domain] Plan Name [Axis] Plan Asset Categories [Domain] Securities pledged to secure securities sold under agreements to repurchase [Abstract] Fair value of securities pledged to secure public funds on deposit or for other purposes RECLASSIFICATION Proceeds from sales of trading assets Net decrease in securities sold under agreements to repurchase Repayments of Federal Home Loan Bank long term advances Proceeds from maturities and principal collected on securities available for sale Proceeds from maturities and principal collected on securities held to maturity Proceeds from sales and calls of securities available for sale Proceeds from sales of loans held for sale Proceeds on sales Redemption of Federal Home Loan Bank and Federal Reserve Bank stock Proceeds from sale of other real estate owned Sale of treasury stock Proceeds from Sale of Treasury Stock Professional Fees Property, plant and equipment, useful life Property, Plant and Equipment, Useful Life Property, Plant and Equipment, Type [Domain] PREMISES & EQUIPMENT [Abstract] PREMISES AND EQUIPMENT Property, Plant and Equipment, Net, by Type [Abstract] Premises and equipment, net Property, Plant and Equipment, Net, Total Property, Plant and Equipment [Line Items] Property, Plant and Equipment, Gross Premises and equipment Property, Plant and Equipment, Type [Axis] PREMISES & EQUIPMENT Property, Plant and Equipment Disclosure [Text Block] Provision Provision for loan losses Range [Axis] Range [Domain] Other real estate owned valuation allowance Receivable Type [Domain] Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Reportable segments and reconciliation to consolidated results [Abstract] REGULATORY CAPITAL REQUIREMENTS [Abstract] REGULATORY CAPITAL REQUIREMENTS Regulatory Capital Requirements under Banking Regulations [Text Block] RELATED PARTY TRANSACTIONS Related Party Transactions Disclosure [Text Block] Related Party Transactions [Line Items] Related Party Transaction [Line Items] Related Party [Domain] RELATED PARTY TRANSACTIONS [Abstract] Deposit Liabilities Related Party Deposit Liabilities Related Party [Axis] SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE Repurchase Agreements, Resale Agreements, Securities Borrowed, and Securities Loaned Disclosure [Text Block] Mortgage-backed securities, residential [Member] Mortgage-backed securities, residential [Member] Residential mortgages [Member] Residential Mortgages [Member] Reserve requirement Restricted Stock [Member] Expense to employee restricted stock awards Retained earnings Retained Earnings [Member] WEALTH MANAGEMENT GROUP FEE INCOME Risk Based Ratios [Abstract] Substandard [Member] Schedule of expected amortization expense Schedule of Financing Receivable, Allowance for Credit Losses [Table] Schedule of Impaired Financing Receivable [Table] Components of Income tax expense Summary of assets and liabilities measured at fair value on a recurring basis Schedule of Financing Receivable, Troubled Debt Restructurings [Table] Components of net periodic postretirement benefit cost Components of net periodic benefit cost Components of net periodic benefit cost and other amounts recognized in other comprehensive income Change in plan assets Change in plan assets Change in plan assets Fair value of the plan assets Amounts expected to be recognized in net periodic cost Schedule of Net Periodic Benefit Cost Not yet Recognized [Table Text Block] Target Assets Allocations Schedule of Available-for-sale Securities [Table] Effective Income tax expense Reconciliation of unrecognized tax benefits Schedule of Finite-Lived Intangible Assets [Table] Amounts expected to be recognized in net periodic cost Amounts expected to be recognized in net periodic cost Schedule of Financing Receivable Past Due [Table] Schedule of Assets Sold under Agreements to Repurchase [Table] Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table] Related Party Loans Change in projected benefit obligation Change in benefit obligation Deferred tax assets and deferred tax liabilities Parent Company Statement of Financial Position Schedule of Condensed Balance Sheet [Table Text Block] Effect of one-percentage point change in assumed health care cost trend rates Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Summary of restricted stock activity Schedule of acquired finite-lived intangible assets by major class Investment securities in an unrealized loss position Schedule of Unrealized Loss on Investments [Table Text Block] Amounts recognized in accumulated other comprehensive income Amount recognized in accumulated other comprehensive income Schedule of Available-for-sale Securities [Line Items] Parent Company Statement of Cashflow Schedule of Condensed Cash Flow Statement [Table Text Block] Weighted-average assumption for disclosure Principal actuarial assumptions used in determining the projected benefit obligation Principal actuarial assumptions used in determining the projected benefit obligation Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table] Amount recognized in accumulated other comprehensive income Amount recognized in accumulated other comprehensive income Changes in accumulated postretirement benefit obligation Actual capital amounts and ratios of the Corporation and the Bank Components of accumulated other comprehensive income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Estimated benefit payments Expected Payments Estimated benefit payments Parent Company Statement of Income Schedule of Condensed Income Statement [Table Text Block] Schedule Of Fair Value Off Balance Sheet Risks [Table] Schedule of Condensed Financial Statements [Table] Schedule of Equity Method Investments [Table] Securities pledged to secure securities sold under agreements to repurchase Schedule of Equity Method Investments [Line Items] Schedule of Defined Benefit Plans Disclosures [Table] Equity Method Investee, Name [Axis] Contractual amounts of financial instruments with off-balance sheet risk Schedule of Investment Income, Reported Amounts, by Category [Line Items] Schedule of changes in goodwill Schedule of Held-to-maturity Securities [Line Items] Schedule of Investment Income, Reported Amounts, by Category [Table] Schedule of Held-to-maturity Securities [Table] Schedule of Investment Income, Reported Amounts, by Category [Axis] Summary of securities sold under agreements to repurchase Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Related Party Transactions, by Related Party [Table] Summarized financial information showing reconciliation of segment net income loss and assets to consolidated results Schedule of Property, Plant and Equipment [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Composition of the loan portfolio by type Estimated Fair Value of Collateral Securities Securities sold under agreements to repurchase Balance at December 31 Securities Sold under Agreements to Repurchase Estimated Fair Value Security Owned and Pledged as Collateral, Fair Value Segment Reporting Information [Line Items] Segment Reporting [Abstract] Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments [Abstract] SEGMENT REPORTING [Abstract] SEGMENT REPORTING Segment Reporting Disclosure [Text Block] SEGMENT REPORTING Segment [Domain] Vested in Period, Total Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] 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 Forfeited or Cancelled (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Nonvested, Beginning Balance (in dollars per share) Nonvested (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 Award Vesting Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward] Share-based Compensation Arrangements [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Nonvested, Beginning Balance (in shares) Nonvested, Ending Balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period STOCK-BASED COMPENSATION [Abstract] Share-based Compensation [Abstract] Forfeitures or Cancelled (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 Granted (in shares) 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 Number of Shares Authorized Annually (in shares) Number of shares authorized per calendar year (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Award Type [Domain] STOCK-BASED COMPENSATION SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Special Mention [Member] Standby letters of credit [Member] Standby Letters of Credit [Member] Statement [Table] Statement [Line Items] CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY [Abstract] CONSOLIDATED STATEMENTS OF CASH FLOWS [Abstract] Statement of Cash Flows [Abstract] Statement, Business Segments [Axis] Business Segments [Axis] Statement Equity Components [Axis] CONSOLIDATED BALANCE SHEETS [Abstract] Statement of Financial Position [Abstract] CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract] Issuance of shares related to FOFC Merger (in shares) Issuance related to FOFC Merger Sale of treasury stock Distribution of shares of treasury stock for employee compensation (in shares) Distribution of shares of treasury stock for employee compensation