Equity Components [Axis] Securities [Member] Derivatives [Member] Defined Benefit Plan [Member] Major Types of Debt and Equity Securities [Axis] Government-Sponsored Mortgage-Backed Securities [Member] US Government Guaranteed Mortgage-Backed Securities [Member] Corporate Bonds [Member] States and Municipal Bonds [Member] Government-Sponsored Enterprise Obligations [Member] Mutual Funds [Member] Class of Financing Receivable [Axis] Debt Securities [Member] Collateralized Mortgage Backed Securities [Member] Commercial Real Estate [Member] Residential Real Estate - Residential [Member] Residential Real Estate - Home Equity [Member] Commercial and Industrial [Member] Consumer [Member] Residential Real Estate [Member] Unallocated [Member] Financing Receivables, Period Past Due [Axis] 30-59 Days Past Due [Member] 60 - 89 Days Past Due [Member] Greater than 90 Days Past Due [Member] Business Acquisition [Axis] Chicopee Bancorp Inc [Member] Internal Credit Assessment [Axis] Loans rated 1-4 [Member] Loans rated 5 [Member] Loans rated 6 [Member] Commercial Real Estate - Construction Loans [Member] Finite-Lived Intangible Assets by Major Class [Axis] Core Deposit Intangibles [Member] Award Type [Axis] Stock Options [Member] Plan Name [Axis] LTI Plan for 2016 [Member] Vesting [Axis] Original Threshold [Member] Original Target [Member] LTI Plan for 2017 [Member] Adjusted Threshold [Member] Adjusted Target [Member] Range [Axis] Original Maximum [Member] Adjusted Maximum [Member] LTI Plan for 2018 [Member] Stretch [Member] Restricted Stock [Member] Stock Compensation Plan [Member] LTI Plan [Member] Time-Vested Restricted Stock [Member] Performance Shares [Member] Retention Based Shares [Member] Award, Tranche One [Member] Award, Tranche Two [Member] Debt Instrument [Axis] FHLBB Advances [Member] Lender Name [Axis] FHLBB Ideal Way Line of Credit [Member] Short-term Debt, Type [Axis] Cutomer Repurchase Agreements [Member] Atlantic Community Bankers Bank [Member] PNC Bank [Member] Balance Sheet Location [Axis] Other Assets [Member] Derivative Instrument [Axis] Interest Rate Swap Agreement [Member] Hedging Designation [Axis] Designated as Hedging Instrument [Member] Other Liabilities [Member] Interest Rate Swap [Member] Hedging Relationship [Axis] Derivatives Designated As Cash Flow Hedges [Member] Measurement Frequency [Axis] Recurring [Member] Fair Value By Fair Value Hierarchy Level [Axis] Fair Value Level 1 [Member] Financial Instrument [Axis] Fair Value Level 2 [Member] Nonrecurring [Member] Fair Value Inputs Level 3 [Member] Impaired Loans [Member] Measurement Basis [Axis] Carrying Value [Member] Fair Value Level 3 [Member] Common Stock [Member] Additional Paid-In Capital [Member] Unearned Compensation-ESOP [Member] Unearned Compensation-Equity Incentive Plan [Member] Retained Earnings [Member] Accumulated Other Comprehensive Loss [Member] Geographical [Axis] Massachusetts and Granby and Enfield, Connecticut [Member] Document And Entity Information Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Current Fiscal Year End Date Entity's Reporting Status Current Entity Filer Category Entity Public Float Entity Common Stock, Shares Outstanding Document Fiscal Period Focus Document Fiscal Year Focus Statement of Financial Position [Abstract] ASSETS CASH AND DUE FROM BANKS FEDERAL FUNDS SOLD INTEREST-BEARING DEPOSITS AND OTHER SHORT-TERM INVESTMENTS CASH AND CASH EQUIVALENTS SECURITIES AVAILABLE-FOR-SALE - AT FAIR VALUE MARKETABLE EQUITY SECURITIES - AT FAIR VALUE FEDERAL HOME LOAN BANK OF BOSTON AND OTHER RESTRICTED STOCK - AT COST LOANS - Net of allowance for loan losses of $12,235 and $10,831 at September 30, 2018 and December 31, 2017, respectively PREMISES AND EQUIPMENT, Net ACCRUED INTEREST RECEIVABLE BANK-OWNED LIFE INSURANCE DEFERRED TAX ASSET, Net GOODWILL CORE DEPOSIT INTANGIBLE OTHER ASSETS TOTAL ASSETS LIABILITIES AND SHAREHOLDERS' EQUITY LIABILITIES: DEPOSITS : Non-interest-bearing Interest-bearing Total deposits SHORT-TERM BORROWINGS LONG-TERM DEBT OTHER LIABILITIES TOTAL LIABILITIES SHAREHOLDERS' EQUITY: Preferred stock - $0.01 par value, 5,000,000 shares authorized, none outstanding at September 30, 2018 and December 31, 2017 Common stock - $0.01 par value, 75,000,000 shares authorized, 29,453,808 shares issued and outstanding at September 30, 2018; 30,487,309 shares issued and outstanding at December 31, 2017 Additional paid-in capital Unearned compensation - ESOP Unearned compensation - Equity Incentive Plan Retained earnings Accumulated other comprehensive loss TOTAL SHAREHOLDERS' EQUITY: TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY Allowance for loan losses Preferred stock, par value (in dollars per share) Preferred stock, authorized Common stock, par value (in dollars per share) Common stock, authorized Common stock, issued Common stock, outstanding Income Statement [Abstract] INTEREST AND DIVIDEND INCOME: Residential and commercial real estate loans Commercial and industrial loans Consumer loans Debt securities, taxable Debt securities, tax-exempt Equity securities Other investments Short-term investments Total interest and dividend income INTEREST EXPENSE: Deposits Long-term debt Short-term borrowings Total interest expense Net interest and dividend income PROVISION FOR LOAN LOSSES Net interest and dividend income after provision for loan losses NON-INTEREST INCOME (LOSS): Service charges and fees Income from bank-owned life insurance Bank-owned life insurance death benefit Gain (loss) on securities, net Unrealized losses on marketable equity securities, net Gain on sale of other real estate owned Other income Total non-interest income NON-INTEREST EXPENSE: Salaries and employee benefits Occupancy Furniture and equipment Data processing Professional fees FDIC insurance assessment Merger related expenses Advertising Other expenses Total non-interest expense INCOME BEFORE INCOME TAXES INCOME TAX PROVISION NET INCOME EARNINGS PER COMMON SHARE: Basic earnings per share (in dollars per share) Weighted average shares outstanding (in shares) Diluted earnings per share (in dollars per share) Weighted average diluted shares outstanding (in shares) Statement of Comprehensive Income [Abstract] Net income Other comprehensive income (loss): Unrealized (losses) gains on securities: Unrealized holding (losses) gains on available-for-sale securities Reclassification adjustment for (gain) loss realized in income(1) Unrealized (losses) gains on securities Tax effect Net-of-tax amount Cash flow hedges: Change in fair value of derivatives used for cash flow hedges Reclassification adjustment for loss realized in interest expense(2) Reclassification adjustment for termination fee realized in interest expense(3) Unrealized gains on cash flow hedges Tax effect Net-of-tax amount Defined benefit pension plan: Amortization of defined benefit plan actuarial loss(4) Tax effect Net-of-tax amount Other comprehensive (loss) income Comprehensive income Income tax benefits on realized losses on available-for-sale securities Income tax benefit on derivative instruments Income tax benefit on termination fee on derivative instruments Income tax benefit, defined benefit plans Statement [Table] Statement [Line Items] BALANCE AT BEGINNING BALANCE AT BEGINNING (shares) Comprehensive income Cumulative-effect adjustment due to change in accounting principle (ASU 2016-01) Common stock held by ESOP committed to be released Share-based compensation - equity incentive plan Common stock repurchased Common stock repurchased (in shares) Issuance of common stock in connection with stock option exercises Issuance of common stock in connection with stock option exercises (shares) Issuance of common stock in connection with equity incentive plan Issuance of common stock in connection with equity incentive plan (shares) Cash dividends declared and paid BALANCE AT ENDING BALANCE AT ENDING (shares) Statement of Stockholders' Equity [Abstract] Common stock held by ESOP committed to be released (shares) Cash dividends declared (per share) Statement of Cash Flows [Abstract] OPERATING ACTIVITIES: Adjustments to reconcile net income to net cash provided by operating activities: Provision for loan losses Depreciation and amortization of premises and equipment Accretion of purchase accounting adjustments, net Amortization of core deposit intangible Net amortization of premiums and discounts on securities and mortgage loans Share-based compensation expense ESOP expense Unrealized losses on marketable equity securities, net Net loss (gain) on redemption and sales of securities Gain on sale of other real estate owned Deferred income tax benefit Income from bank-owned life insurance Bank-owned life insurance death benefits Net change in: Accrued interest receivable Other assets Other liabilities Net cash provided by operating activities INVESTING ACTIVITIES: Securities, available for sale: Purchases Proceeds from redemptions and sales Proceeds from calls, maturities, and principal collections Purchase of residential mortgages Loan originations and principal payments, net Redemption of Federal Home Loan Bank of Boston stock Proceeds from sale of other real estate owned Purchases of premises and equipment Proceeds from sale of premises and equipment Proceeds from payout on bank-owned life insurance Net cash used in investing activities FINANCING ACTIVITIES: Net increase (decrease) in deposits Net change in short-term borrowings Repayment of long-term debt Proceeds from long-term debt Cash dividends paid Common stock repurchased Issuance of common stock in connection with stock option exercises Net cash provided by (used in) financing activities NET CHANGE IN CASH AND CASH EQUIVALENTS: Beginning of period End of period Supplemental cash flow information: Net change in cash due to broker for common stock repurchased Interest paid Taxes paid Accounting Policies [Abstract] SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Earnings Per Share, Basic [Abstract] EARNINGS PER SHARE Stockholders' Equity Note [Abstract] COMPREHENSIVE INCOME/LOSS Investments, Debt and Equity Securities [Abstract] SECURITIES Receivables [Abstract] LOANS AND ALLOWANCE FOR LOAN LOSSES Goodwill and Intangible Assets Disclosure [Abstract] GOODWILL AND OTHER INTANGIBLES Disclosure of Compensation Related Costs, Share-based Payments [Abstract] SHARE-BASED COMPENSATION Debt Disclosure [Abstract] SHORT-TERM BORROWINGS AND LONG-TERM DEBT Defined Benefit Plan [Abstract] PENSION BENEFITS Derivative Instruments and Hedging Activities Disclosure [Abstract] DERIVATIVES AND HEDGING ACTIVITIES Fair Value Disclosures [Abstract] FAIR VALUE OF ASSETS AND LIABILITIES Accounting Changes and Error Corrections [Abstract] RECENT ACCOUNTING PRONOUNCEMENTS Nature of Operations Wholly-Owned Subsidiaries and Acquisition Principles of Consolidation Estimates Basis of Presentation Reclassifications Schedule of earnings per common share Schedule of accumulated other comprehensive loss included sharesholders equity Schedule of changes in accumulated other loss by component Schedule of securities available for sale Schedule of amortized cost and fair value of securities available for sale by maturity Schedule of gross realized gains and losses on sales of securities available for sale Schedule of securities with gross unrealized losses in continuous loss position Schedule of loans Schedule of mortgage servicing rights Schedule of analysis of changes in allowance for loan losses by segment Schedule of information pertaining to the allowance for loan losses by segment Schedule of past due and nonaccrual loans by class Schedule of impaired loans by class Schedule of loans acquired with deteriorated credit quality Schedule of loans by risk rating Schedule of stock option activity Schedule of original and adjusted threshold and target metrics Schedule of stock award plan activity Schedule of net pension benefit costs Schedule of fair values of derivative financial instruments Schedule of information about cash flow hedges Schedule of pre-tax net losses of cash flow hedges Schedule of assets and liabilities measured at fair value on recurring basis Schedule of assets measured at fair value on non-recurring basis Schedule of estimated fair values of financial instruments Number of banking offices in which bank operates Merger consideration paid in transaction to shareholders of Chicopee Number of shares issued (in shares) Earnings Per Share [Abstract] Earnings per common share Net income applicable to common stock Average number of common shares issued Less: Average unallocated ESOP Shares Less: Average unvested equity incentive plan shares Average number of common shares outstanding used to calculate basic earnings per common share Effect of dilutive equity incentive plan Effect of dilutive stock options Average number of common shares outstanding used to calculate diluted earnings per common share Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Line Items] Fair value of derivatives used for cash flow hegdes Derivative Termination fee on cancelled cash flow hedges Accumulated other comprehensive income (loss) before tax Tax effect Accumulated other comprehensive income (loss), net of tax amount Beginning balance Cumulative-effect adjustment due to change in accounting principle (ASU 2016-01) Current-period other comprehensive (loss) income Ending balance Schedule of Investments [Table] Schedule of Investments [Line Items] Available-For-Sale Securities Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Class of Financing Receivable, Type [Axis] Available for Sale Securities, Amortized Cost, Due in one year or less Available for Sale Securities, Amortized Cost, Due after one year through five years Available for Sale Securities, Amortized Cost, Due after five years through ten years Available for Sale Securities, Amortized Cost, Due after ten years Available for Sale Securities, Amortized Cost, Total Available for Sale Securities, Fair Value, Due in one year or less Available for Sale Securities, Fair Value, Due after one year through five years Available for Sale Securities, Fair Value, Due after five years through ten years Available for Sale Securities, Fair Value, Due after ten years Available for Sale Securities, Fair Value, Total Gross gains realized Gross losses realized Net gain realized Available for sale, Less Than 12 Months Fair Value Available for sale, Less Than 12 Months Gross Unrealized Losses Available for sale, Over 12 Months Fair Value Available for sale, Over 12 Months Gross Unrealized Losses Number of Securities - less than 12 months Gross Loss - less than 12 months Depreciation from Amortized Cost Basis (%) - less than 12 months Number of Securities - Over 12 Months Gross Loss - Over 12 Months Depreciation from Amortized Cost Basis (%) - Over 12 months Fair value of collateralized public deposits Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Accounts, Notes, Loans and Financing Receivable [Line Items] Unamortized total loans Unearned premiums and deferred loan fees and costs, net Allowance for loan losses Loans, net Servicing Asset Balance at the beginning of period: Capitalized mortgage servicing rights Amortization Balance at the end of year Fair value at the end of year Beginning Balance Provision (credit) Charge-offs Recoveries Ending Balance Schedule of Financing Receivable, Allowance for Credit Losses [Table] Amount of allowance for impaired loans Amount of allowance for non-impaired loans Total allowance for loan losses Impaired loans Non-impaired loans Amount of loans acquired with deteriorated credit quality Total loans Schedule of Financing Receivables Past Due [Table] Total Past Due Past Due 90 Days or More and Still Accruing Non-Accrual Loans Schedule of Impaired Financing Receivable [Table] Financing Receivable, Impaired [Line Items] Total Impaired loans: Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized Loans receivable - Contractual Required Payments Receivable beginning Collections - Contractually Required Payments Receivable Dispositions - Contractually Required Payments Receivable Loans receivable - Contractual Required Payments Receivable ending Loans receivable - Cash Expected To Be Collected beginning Collections - Cash Expected to be Collected Dispositions - Cash Expected to be Collected Loans receivable - Cash Expected To Be Collected ending Loans receivable - Non-Accretable Discount beginning Collections - Non-Accretable DIscount Dispositions - Non-Accretable Discount Loans receivable - Non-Accretable Discount ending Loans receivable - Accretable Yield beginning Collections - Accretable Yield Dispositions - Accretable Yield Loans receivable - Accretable Yield ending Loans receivable - Outstanding beginning Collections Dispositions Loans receivable - Outstanding ending Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table] Financing Receivable, Recorded Investment [Line Items] Loans Purchase of residential mortgages Serviced commercial loans for participants Mortgage loans serviced for others Net service fee income Weighted average internal rate of return Weighted average servicing fee Net cost to service loans Acquired deposit liabilities Acquired core deposit liabilities Future amortization of core deposit intangible assets years 1-5 Future amortization of core deposit intangible assets thereafter Options, Outstanding Outstanding at beginning of period Exercised Outstanding at end of period Exercisable at end of period Options, Outstanding, Weighted Average Exercise Price Outstanding at beginning of period Exercised Outstanding at end of period Exercisable at end of period Options, Outstanding, Weighted Average Remaining Contractual Term (in years) Outstanding at beginning of period Exercised Outstanding at end of period Exercisable at end of period Options, Outstanding, Aggregate Intrinsic Value Outstanding at beginning of period Exercised Outstanding at end of period Exercisable at end of period December 31, 2018 December 31, 2019 December 31, 2020 Original metrics Adjusted metrics Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Legal Entity [Axis] Restricted Stock Awards Beginning balance Shares granted Shares vested Ending balance Weighted Average Grant Date Fair Value Beginning balance Shares granted Shares vested Ending balance Stock Options Cash received for options exercised Restricted Stock Awards Shares authorized Share-based compensation expense Share based compensation, shares available for grant Vesting term Percent of awards under plan Percent of awards participants may earn Short-term borrowings Line of credit available Required cash reserve amount Fair value of collateralized repurchase agreements Customer repurchase agreements Long-term debt Service cost Interest cost Expected return on assets Actuarial loss Net periodic pension cost Fair value of derivative assets Fair value of derivative liability Notional Amount Weighted Average Maturity Weighted Average Rate Received Weighted Average Rate Paid Estimated Fair Value Amount of Gain (Loss) Recognized in OCI on Derivative (Effective Portion) Estimated amount to be reclassified during the next 12 month period Reclassifications amount, effective portion Termination value of derivatives in a net liability position Fair value of mortgage backed securities collateralized Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Hierarchy [Axis] Available for sale securities Marketable equity securities Mutual funds Interest rate swaps - Assets Total assets Interest rate swaps - Liabilities Gains (losses) arising from fair value adjustment of assets Impaired loans Total Assets Fair Value, by Balance Sheet Grouping [Table] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Assets: Cash and cash equivalents Securities available-for-sale Federal Home Loan Bank of Boston and other restricted stock Loans - net Accrued interest receivable Mortgage servicing rights Derivative assets Liabilities: Deposits Short-term borrowings Long-term debt Accrued interest payable Derivative liabilities Future lease payments outstanding It represents the amount of accrued investment income receivable fair value disclosure. Information by range, including, but not limited to, upper and lower bounds. Information by vesting schedule for share-based compensation. Information by vesting schedule for share-based compensation. It represents the amount of allowance for loans acquired with deteriorated credit quality. It represents the amount of loans acquired with deteriorated credity quality. The amount of assets at fair value. Information by name of lender, which may be a single entity (for example, but not limited to, a bank, pension fund, venture capital firm) or a group of entities that participate in the line of credit. It represents the amount of available for sale securities, continuous unrealized loss position, less than twelve months, depreciation from amortized cost percentage. Available for Sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Depreciation from Amortized Cost Percentage The amount of bank owned life insurance death benefits. The amount of bank owned life insurance death benefit. Amount of core deposit liabilities assumed at the acquisition date. Amount of deposit liabilities assumed at the acquisition date. Information related to Chicopee Bancorp, Inc. (“Chicopee”), the holding company for Chicopee Savings Bank. The collections from loans (accreditable yeld) acquired with deteriorated credit quality, The collections from loans (cash flows expected to be collected) acquired with deteriorated credit quality, The collections from loans (contractually required payments) acquired with deteriorated credit quality, The collections from loans (non-accreditable yeld) acquired with deteriorated credit quality, The collections from loans acquired with deteriorated credit quality, Sector of the economy consisting of companies engaged in commercial and industrial business activities. Amount of the reclassification adjustment to AOCI, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption. Summary of the amount of net periodic benefit cost for defined benefit plans for the period. Amount before tax of increase (decrease) in accumulated equity from fees for termination of swap agreement. The dispositions of loans (accreditable yeld) acquired with deteriorated credit quality, The dispositions of loans (cash flows expected to be collected) acquired with deteriorated credit quality, The disposition of loans (contractually required payments) acquired with deteriorated credit quality, The dispositions of loans (non-accreditable yeld) acquired with deteriorated credit quality, The dispositions of loans acquired with deteriorated credit quality, Number of shares effect of dilutive equity incentive plan. The member represent employee stock ownership plan esop plan member. Fair value of an mortgage servicing rights representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements. Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized for each of the next five years. It represents the percentage of grants under incentive program. Fair value portion of impaired loans receivable, Information related to impaired loans. Income tax benefit on termination fee on derivative instruments Interest income on federal funds sold. Federal funds sold represent the excess federal funds held by one commercial bank which it lends to another commercial bank, usually at an agreed-upon (federal funds) rate of interest. Such loans are made for legal reserve requirement purposes of the borrowing bank and generally are of short-duration (overnight). Also include interest income on other investments not otherwise specified in the taxonomy that will be realized in a short period of time, usually less than one year or the normal operating cycle, whichever is longer. Interest Payable, Fair Value Disclosure Interest Rate Swap Agreement [Member] Amount of the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans with evidence of deterioration of credit quality. Name of the equity-based compensation arrangement plan. Information related to long term incentive program. Name of the equity-based compensation arrangement plan. Name of the equity-based compensation arrangement plan. Information related to Massachusetts and Granb. Third party mortgage loans serviced at period end. Regulated investment instrument that pools funds from multiple investors to invest principally in a portfolio of securities and money market instruments to match the investment objective. It refers to amount of net accretion of purchase accounting adjustments during the period. The amount of net change in cash due to broker for common stock repurchased. Amount of net cost to service loans per loan. Number of branches the bank operates by location. It represents the number of securities, continuous unrealized loss position less than twelve months. It represents the number of securities, continuous unrealized loss position more than twelve months. Amount before tax of reclassification adjustment for Termination fee from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss). Information by name of lender, which may be a single entity (for example, but not limited to, a bank, pension fund, venture capital firm) or a group of entities that participate in the line of credit. Cash inflow (outflow) related to a loan originations and principal payments, net. Percent of performance stock awards participants will be able to earn during the performance period. Percent of performance stock awards participants will be able to earn during the current performance year. Percent of performance stock awards participants will be able to earn during the third performance year. Percent of performance stock awards participants will be able to earn during the next performance year. The amount of process from payout on bank owned life insurance. Stock including a provision that prohibits sale or substantive sale of an equity instrument for a specified period of time or until specified performance conditions are met. Equity-based compensation award. Return on equity adjusted performance metrics used in determining grant of shares under LTI plan as a result of the Tax Cuts and Jobs Act of 2017. Return on equity original performance metrics used in determining grant of shares under LTI plan before the Tax Cuts and Jobs Act of 2017. Schedule of information related to the allowance for loan losses by segment. Schedule of original and adjusted threshold and target metrics under the LTI Plans. It represents the amount of securities, continuous unrealized loss position, less than twelve months, aggregate loss. Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Aggregate Loss Commercial loans serviced for participants at period end. Weighted average remaining contractual term for option awards exercise, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. It refers to weighted average remaining contractual term, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. It represents stretch member. It represents target member. It represents threshold member. Information related to unallocaetd. It represents the percentage of weighted average interest rate of return. It represents the amount of percentage for weighted average servicing fee. Amount before tax of increase (decrease) in accumulated equity from fair value of derivatives used from cash flow hedges. The fair value of available for sales securities pledged to secure public deposits. Cash, Cash Equivalents, and Federal Funds Sold Assets Deposits [Default Label] Liabilities Unearned ESOP Shares Deferred Compensation Equity Stockholders' Equity Attributable to Parent Liabilities and Equity Interest and Dividend Income, Operating Interest Expense Interest Income (Expense), Net Interest Income (Expense), after Provision for Loan Loss Noninterest Income Noninterest Expense Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax Other Comprehensive Income (Loss), Available-for-sale Securities, Tax Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForTerminantionFeeFromAOCIOnDerivativesBeforeTax Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax Shares, Outstanding Cumulative Effect of New Accounting Principle in Period of Adoption Stock Repurchased During Period, Value Dividends, Common Stock, Cash NetAccretionOfPurchaseAccountingAdjustments Gain (Loss) on Sale of Securities, Net Gain (Loss) on Sale of Properties Commercial and Industrial [Member] [Default Label] Increase (Decrease) in Interest and Dividends Receivable Increase (Decrease) in Other Operating Assets Net Cash Provided by (Used in) Operating Activities Payments to Acquire Available-for-sale Securities PaymentLoanOriginationsAndPrincipalPaymentsNet Payments for (Proceeds from) Federal Home Loan Bank Stock Payments to Acquire Property, Plant, and Equipment Net Cash Provided by (Used in) Investing Activities Repayments of Long-term Debt Payments of Dividends Payments for Repurchase of Common Stock Net Cash Provided by (Used in) Financing Activities Cash and Cash Equivalents, Period Increase (Decrease) Options, Outstanding, Weighted Average Remaining Term Weighted Average Number of Shares, Employee Stock Ownership Plan Shares Not Committed to be Released Weighted Average Number of Shares, Contingently Issuable AOCI Including Portion Attributable to Noncontrolling Interest, before Tax AOCI Tax, Attributable to Parent Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax Available-for-sale Securities, Gross Realized Losses Available-for-sale Securities, Gross Realized Gain (Loss) Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value Number Of Securities Continuous Unrealized Loss Position Less Than Twelve Months Number Of Securities Continuous Unrealized Loss Position More Than Twelve Months Servicing Asset at Amortized Cost Servicing Asset at Amortized Cost, Amortization Servicing Asset at Fair Value, Amount Allowance for Loan and Lease Losses, Write-offs Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Contractually Required Payments Receivable at Acquisition CollectionsContractuallyRequiredPaymentsReceivable Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Cash Flows Expected to be Collected at Acquisition CollectionsCashFlowsExpectedToBeCollected LoansReceivableAtAcquisitionNonaccretableYield CollectionsNonaccretableYield Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield CollectionsAccretableYield Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Outstanding Balance CollectionsOnLoansAcquiredWithDeterioratedCreditQuality Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageRemainingContractualTerm2 Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Allocated Share-based Compensation Expense Short-term Debt Defined Benefit Plan, Expected Return (Loss) on Plan Assets Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Fair Value, Option, Changes in Fair Value, Gain (Loss) Two Thousand And Fifteen [Member] Deposits, Fair Value Disclosure Short-term Debt, Fair Value Long-term Debt, Fair Value