Receivables [Abstract] Schedule of Impaired Financing Receivable [Table] Schedule of Impaired Financing Receivable [Table] Class of Financing Receivable, Type [Axis] Class of Financing Receivable, Type [Axis] Class of Financing Receivable, Type [Domain] Class of Financing Receivable, Type [Domain] Commercial and Industrial Commercial Portfolio Segment [Member] Construction Construction Loans [Member] Commercial Real Estate Commercial Real Estate [Member] Residential Real Estate Residential Real Estate [Member] Financing Receivable, Impaired [Line Items] Financing Receivable, Impaired [Line Items] Recorded Investment Impaired Financing Receivable, Recorded Investment [Abstract] With no related allowance recorded Impaired Financing Receivable, with No Related Allowance, Recorded Investment With an allowance recorded Impaired Financing Receivable, with Related Allowance, Recorded Investment Total Impaired Financing Receivable, Recorded Investment Unpaid Principal Balance Impaired Financing Receivable, Unpaid Principal Balance [Abstract] With no related allowance recorded Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance With an allowance recorded Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance Total Impaired Financing Receivable, Unpaid Principal Balance Related Allowance Impaired Financing Receivable, Related Allowance Average Recorded Investment Impaired Financing Receivable, Average Recorded Investment [Abstract] With no related allowance recorded Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment With an allowance recorded Impaired Financing Receivable, with Related Allowance, Average Recorded Investment Total Impaired Financing Receivable, Average Recorded Investment Interest Income Recognized Impaired Financing Receivable, Interest Income, Accrual Method [Abstract] With no related allowance recorded Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method With an allowance recorded Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method Total Impaired Financing Receivable, Interest Income, Accrual Method Investments [Abstract] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] 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] U.S. government agencies US Government Agencies Debt Securities [Member] U.S. government-sponsored enterprises US Government-sponsored Enterprises Debt Securities [Member] State and political subdivisions US States and Political Subdivisions Debt Securities [Member] Mortgage-backed securities - U.S. government-sponsored enterprises Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] Corporate debt Corporate Debt Securities [Member] Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Amortized Cost Available-for-sale Securities, Amortized Cost Basis Gross Unrealized Gains Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax Gross Unrealized Losses Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax Fair Value Available-for-sale Securities Share-based Compensation, Allocation and Classification in Financial Statements [Abstract] STOCK-BASED COMPENSATION Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Goodwill and Intangible Assets Disclosure [Abstract] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Community Bank of Bergen County Merger Community Bank of Bergen County, Merger [Member] Community Bank of Bergen County, Merger [Member] Enterprise Bank N.J. Enterprise Bank N.J. [Member] Enterprise Bank N.J. [Member] Segments [Axis] Segments [Axis] Segment [Domain] Segments [Domain] Insurance Services Insurance Services [Member] Insurance Services [Member] Banking and Financial Services Banking And Financial Services [Member] Banking And Financial Services [Member] 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] Goodwill Goodwill Goodwill acquired Goodwill, Acquired During Period Estimated fair value of the insurance segment exceeded its carrying value Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount Intangibles Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Amortization Amortization Business Combinations [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Credit Loss Status [Axis] Credit Loss Status [Axis] Credit Loss Status [Axis] Credit Loss Status [Axis] [Domain] Credit Loss Status [Axis] [Domain] [Domain] for Credit Loss Status [Axis] [Axis] Loans acquired with credit deterioration Financial Asset Acquired with Credit Deterioration [Member] Financial Asset Acquired with Credit Deterioration [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Contractually required principal and interest at acquisition Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Contractually Required Payments Receivable at Acquisition Contractual cash flows not expected to be collected (non-accretable difference) Certain Loans Acquired in Transfer, Nonaccretable Difference Expected cash flows at acquisition Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Cash Flows Expected to be Collected at Acquisition Interest component of expected cash flows (accretable difference) Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Fair value of acquired loans Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value GOODWILL AND OTHER INTANGIBLES Goodwill and Intangible Assets Disclosure [Text Block] Guarantees [Abstract] Letter of credit, expiration term Line of Credit Facility, Expiration Period Undrawn standby letters of credit outstanding Letters of Credit Outstanding, Amount Segment Reporting [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Net interest income from external sources Interest Income (Expense), Net Other income from external sources Noninterest Income Depreciation and amortization Depreciation, Depletion and Amortization Income before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Income tax expense Income Tax Expense (Benefit) Total assets Assets Statutory tax rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Comprehensive Income [Abstract] Other Comprehensive Income [Abstract] Components of Other Comprehensive Income and Related Tax Effects Schedule Of Other Comprehensive Income And Related Tax Effects Components [Table Text Block] Schedule Of Other Comprehensive Income And Related Tax Effects Components [Table Text Block] Before Tax Other Comprehensive Income (Loss), before Tax [Abstract] Unrealized losses on available for sale securities Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax Fair value adjustments on derivatives Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax Total other comprehensive (loss) income Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent Tax Effect Other Comprehensive Income (Loss), Tax, Parenthetical Disclosures [Abstract] Unrealized losses on available for sale securities Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax Fair value adjustments on derivatives Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax Total other comprehensive (loss) income Other Comprehensive Income (Loss), Tax Net of Tax Other Comprehensive Income (Loss), Net of Tax [Abstract] Unrealized losses on available for sale securities Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Fair value adjustments on derivatives Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax Other comprehensive income (loss), net of income taxes Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Schedule of Estimated Future Amortization Expense Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Changes in the Allowance for Loan Losses Allowance for Credit Losses on Financing Receivables [Table Text Block] Allowances of Loan Losses and Loans Receivable by Class Disaggregated Schedule Of Allowances Of Loan Losses And Loans Receivable By Class Disaggregated [Table Text Block] Schedule Of Allowances Of Loan Losses And Loans Receivable By Class Disaggregated [Table Text Block] An Age Analysis of Loans Receivable Past Due Financing Receivables [Table Text Block] Loans Which the Accrual of Interest has been Discontinued Schedule Of Loans With Accrual Interest [Table Text Block] Schedule Of Loans With Accrual Interest [Table Text Block] Credit Risk Profile by Creditworthiness Financing Receivable Credit Quality Indicators [Table Text Block] Impaired Loans Impaired Financing Receivables [Table Text Block] Troubled Debt Restructured on Recorded Investment Troubled Debt Restructurings On Recorded Investment [Table Text Block] Troubled Debt Restructurings On Recorded Investment [Table Text Block] Troubled Debt Restructurings in Current Year Troubled Debt Restructurings on Financing Receivables [Table Text Block] SEGMENT INFORMATION Segment Reporting Disclosure [Text Block] Loans and Leases Receivable Disclosure [Abstract] LOANS Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Fair Value Disclosures [Abstract] FAIR VALUE OF FINANCIAL INSTRUMENTS Fair Value Disclosures [Text Block] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Quoted Prices in Active Markets for Identical Assets (Level I) Fair Value, Inputs, Level 1 [Member] Significant Other Observable Inputs (Level II) Fair Value, Inputs, Level 2 [Member] Significant Unobservable Inputs (Level III) Fair Value, Inputs, Level 3 [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Securities available for sale, at fair value Available-for-sale Securities, Debt Securities Interest rate swaps Derivative Asset, Fair Value, Gross Asset Interest rate swaps - liability Derivative Liability, Fair Value, Gross Liability Schedule of Segment Reporting Information Schedule of Segment Reporting Information, by Segment [Table Text Block] Cash and cash equivalents Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Interest bearing time deposits with other banks Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Interest Bearing Time Deposits Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Interest Bearing Time Deposits Securities available for sale Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Marketable Securities Other bank stock Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Bank Stock Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Bank Stock Loans Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Loans Receivable Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Loans Receivable Foreclosed real estate Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Foreclosed Real Estate Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Foreclosed Real Estate Premises and equipment, net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Accrued interest receivable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Interest Receivable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Interest Receivable Goodwill and intangible assets Intangibles assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Bank-owned life insurance Bank Owned Life Insurance Other assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets Total Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Deposits Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Liabilities, Assumed Deposits Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Current Liabilities, Assumed Deposits Borrowings Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt Other liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other Total Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Net consideration paid - common shares issued Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Statement of Stockholders' Equity [Abstract] Dividends declared (in dollars per share) Common Stock, Dividends, Per Share, Declared Leases [Abstract] RIGHT OF USE ASSET AND LEASE LIABILITY Lessee, Operating Leases [Text Block] Earnings Per Share [Abstract] Calculation Methods of Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Summary of Estimated Fair Value of Acquired Assets and Liabilities Assumed Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Summary of Fair Value Adjustments to Amortized Cost Basis of Loans Acquired Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Table Text Block] Pro Forma Business Acquisition Information Business Acquisition, Pro Forma Information [Table Text Block] Schedule of Financing Receivable, Troubled Debt Restructurings [Table] Schedule of Financing Receivable, Troubled Debt Restructurings [Table] Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] Performing Performing Financial Instruments [Member] Non-performing Nonperforming Financial Instruments [Member] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Financing Receivable, Modifications [Line Items] Financing Receivable, Modifications [Line Items] Total investment in troubled debt Financing Receivable, Modifications, Recorded Investment Number of Loans Financing Receivable, Modifications, Number of Contracts Pre-Modification Outstanding Recorded Investment Financing Receivable, Modifications, Pre-Modification Recorded Investment Post-Modification Outstanding Recorded Investment Financing Receivable, Modifications, Post-Modification Recorded Investment Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] 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] Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Options outstanding, beginning of year (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Options outstanding, end of quarter (in shares) Options exercisable, end of quarter (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Weighted Average Exercise Price per Share Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Options outstanding, beginning of year (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Options outstanding, end of quarter (in dollars per share) Options exercisable, end of quarter (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Weighted Average Contractual Term, Outstanding, end of quarter Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Weighted Average Contractual Term, Exercisable, end of quarter Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Aggregate Intrinsic Value, Outstanding, end of quarter Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Aggregate Intrinsic Value, Exercisable, end of quarter Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Option price range at end of quarter (in dollars per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price Option price of exercisable shares (in dollars per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative [Table] Derivative [Table] Hedging Relationship [Axis] Hedging Relationship [Axis] Hedging Relationship [Domain] Hedging Relationship [Domain] Cash flow hedging Cash Flow Hedging [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Junior subordinated debt Junior Subordinated Debt [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] LIBOR London Interbank Offered Rate (LIBOR) [Member] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Derivative Effective Date September 15, 2018 Contract 1 Derivative Effective Date September 15, 2018 Contract 1 [Member] Derivative Effective Date September 15, 2018 Contract 1 [Member] Derivative Effective Date September 15, 2018 Contract 3 Derivative Effective Date September 15, 2018 Contract 3 [Member] Derivative Effective Date September 15, 2018 Contract 3 [Member] Derivative Effective Date March 15, 2016 Derivative Effective Date March152016 [Member] Derivative Effective Date March 15, 2016 [Member] Interest Rate Swaps Interest Rate Swap [Member] Derivative Effective Date September 15, 2018 Contract 2 Derivative Effective Date September 15, 2018 Contract 2 [Member] Derivative Effective Date September 15, 2018 Contract 2 [Member] Derivative Effective Date September 15, 2018 Contract 4 Derivative Effective Date September 15, 2018 Contract 4 [Member] Derivative Effective Date September 15, 2018 Contract 4 [Member] Investment Type [Axis] Investment Type [Axis] Investments [Domain] Investments [Domain] Certificates of Deposit Certificates of Deposit [Member] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Derivatives designated as hedging instruments Designated as Hedging Instrument [Member] Derivative [Line Items] Derivative [Line Items] Number of FHLB borrowings Federal Home Loan Bank, Advances, Outstanding, Less than One Billion Dollars Per Borrower, Number of Borrowers Federal Home Loan Bank, Advances, Outstanding, Less than One Billion Dollars Per Borrower, Number of Borrowers Amount of four FHLB borrowings Advances from Federal Home Loan Banks Variable rate junior subordinated debt issued Debt Instrument, Face Amount Variable rate spread on debt instrument Debt Instrument, Basis Spread on Variable Rate Swap agreement term Derivative, Term of Contract Fixed interest rate of swap agreement Derivative, Fixed Interest Rate Notional amount Derivative, Notional Amount Hedge ineffectiveness Derivative, Net Hedge Ineffectiveness Gain (Loss) Number of derivatives Derivative, Number of Instruments Held Reclassifications to interest expense Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion Pledged collateral Derivative, Collateral, Right to Reclaim Cash, Gross Derivative, Collateral, Right to Reclaim Cash, Gross Obligation to return before cash reclaimed Derivative, Collateral, Obligation to Return Before Cash Reclaimed Derivative, Collateral, Obligation To Return Before Cash Reclaimed 2019 Finite-Lived Intangible Assets, Amortization Expense, Next Rolling Twelve Months 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2022 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2023 Finite-Lived Intangible Assets, Amortization Expense, Year Five 2024 Finite-Lived Intangible Assets, Amortization Expense, Year Six Finite-Lived Intangible Assets, Amortization Expense, Year Six Debt Disclosure [Abstract] BORROWINGS Debt Disclosure [Text Block] Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table] Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table] Pass Pass [Member] Special Mention Special Mention [Member] Substandard Substandard [Member] Doubtful Doubtful [Member] Total Commercial Portfolio Segment, Construction Loans And Commercial Real Estate [Member] Commercial Portfolio Segment, Construction Loans And Commercial Real Estate [Member] Consumer and Other Consumer Portfolio Segment [Member] Financing Receivable, Recorded Investment [Line Items] Financing Receivable, Recorded Investment [Line Items] Total loans receivable Financing Receivable, Net ACQUISITIONS Mergers, Acquisitions and Dispositions Disclosures [Text Block] New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2016-02 Accounting Standards Update 2016-02 [Member] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Branch office leases with renew options Branch Office Leases With Renew Options Branch Office Leases With Renew Options Right-of-use assets, net Operating Lease, Right-of-Use Asset Incremental borrowing rate Operating Lease, Weighted Average Discount Rate, Percent Operating lease liability Operating Lease, Liability Weighted average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Lease cost Lease, Cost Operating lease cost Operating Lease, Cost Short term lease cost Short-term Lease, Cost Rent expense Operating Leases, Rent Expense Cash paid on operating leases Operating Lease, Payments Lease not commenced Lessee, Operating Lease, Lease Not yet Commenced, Liability Lessee, Operating Lease, Lease Not yet Commenced, Liability Operating lease term Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract Lease liability Operating Lease, Liability, Noncurrent Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Total loans receivable Loans and Leases Receivable, Gross Unearned net loan origination fees Loans and Leases Receivable, Deferred Income Allowance for loan losses Loans and Leases Receivable, Allowance Net loans receivable Loans and Leases Receivable, Net Amount Revenue from Contract with Customer [Abstract] REVENUE RECOGNITION Revenue from Contract with Customer [Text Block] Service fees on deposit accounts Fees and Commissions, Depositor Accounts ATM and debit card fees ATM and debit card fees ATM and Debit Card Fees Bank-owned life insurance Bank Owned Life Insurance Income Insurance commissions and fees Insurance Commissions and Fees Investment brokerage fees Brokerage Commissions Revenue Other Noninterest Income, Other Total Other Income Total held to maturity securities Held-to-maturity Securities, Amortized Cost before Other than Temporary Impairment Gross Unrealized Gains Held-to-maturity Securities, Accumulated Unrecognized Holding Gain Gross Unrealized Losses Held-to-maturity Securities, Accumulated Unrecognized Holding Loss Securities held to maturity, fair value Held-to-maturity Securities, Fair Value Maturities of Lease Liabilities Lessee, Operating Lease, Liability, Maturity [Table Text Block] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Pro Forma Pro Forma [Member] Total revenues (net interest income plus non-interest income) Revenues Net Income Earnings per share, basic (in dollars per share) Earnings Per Share, Basic ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY OF FINANCING RECEIVABLES Financing Receivables [Text Block] Less Than 12 Months, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value Less Than 12 Months, Gross Unrealized Losses Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 12 Months or More, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 12 Months or More, Gross Unrealized Losses Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Total, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value Total, Gross Unrealized Losses Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss DERIVATIVES Derivative Instruments and Hedging Activities Disclosure [Text Block] Qualitative and Quantitative Information, Transferor's Continuing Involvement [Table] Qualitative and Quantitative Information, Transferor's Continuing Involvement [Table] Asset Class [Axis] Asset Class [Axis] Fair Value by Asset Class [Domain] Asset Class [Domain] Impaired loans Impaired Loans [Member] Impaired Loans [Member] Foreclosed real estate Foreclosed Real Estate [Member] Foreclosed Real Estate [Member] Weighted Average Weighted Average [Member] Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] Fair Value Estimate Assets, Fair Value Disclosure, Nonrecurring Range (Weighted Average) Fair Value Measurements Percentage Of Appraisal Fair Value Measurements Percentage Of Appraisal Schedule of Financing Receivable, Allowance for Credit Losses [Table] Schedule of Financing Receivable, Allowance for Credit Losses [Table] Unallocated Unallocated Financing Receivables [Member] Financing Receivable, Allowance for Credit Losses [Line Items] Financing Receivable, Allowance for Credit Losses [Line Items] Allowance for Loan Losses Financing Receivable, Allowance for Credit Losses Balance Loans Individually Evaluated for Impairment Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment Balance Related to Loans Collectively Evaluated for Impairment Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment Total Financing Receivables Individually Evaluated for Impairment Financing Receivable, Individually Evaluated for Impairment Collectively Evaluated for Impairment Financing Receivable, Collectively Evaluated for Impairment Financing Receivable, Allowance for Credit Losses [Roll Forward] Financing Receivable, Allowance for Credit Losses [Roll Forward] Beginning balance 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 Ending balance Document And Entity Information [Abstract] Document And Entity Information Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal 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 Trading Symbol Trading Symbol Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Statement of Financial Position [Abstract] Preferred stock authorized (in shares) Preferred Stock, Shares Authorized Preferred stock issued (in shares) Preferred Stock, Shares Issued Common stock authorized (in shares) Common Stock, Shares Authorized Common stock issued (in shares) Common Stock, Shares, Issued Common stock outstanding (in shares) Common Stock, Shares, Outstanding Treasury stock (in shares) Treasury Stock, Shares Amortized Cost Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis, Rolling Maturity [Abstract] Due in one year or less Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis Due after one year through five years Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis Due after five years through ten years Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis Due after ten years Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis Total bonds and obligations Available-for-sale Debt Securities, Amortized Cost Basis Securities available for sale, at amortized cost Fair Value Available-for-sale Securities, Debt Maturities, Single Maturity Date [Abstract] Due in one year or less Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value Due after one year through five years Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value Due after five years through ten years Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value Due after ten years Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value Total bonds and obligations Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value Securities available for sale, at fair value Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Derivative Effective Date December 15, 2016 Derivative Effective Date December152016 [Member] Derivative Effective Date December 15, 2016 [Member] Derivative Effective Date June 15, 2017 Derivative Effective Date June152017 [Member] Derivative Effective Date June 15, 2017 [Member] Derivative Effective Date December 15, 2017 Contract 1 Derivative Effective Date December152017 Contract1 [Member] Derivative Effective Date December 15, 2017 Contract 1 [Member] Derivative Effective Date December 15, 2017 Contract 2 Derivative Effective Date December152017 Contract2 [Member] Derivative Effective Date December 15, 2017 Contract 2 [Member] Derivative Effective Date February 21, 2019 Derivative Effective Date February 21, 2019 [Member] Derivative Effective Date February 21, 2019 [Member] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Amount of Gain Recognized in OCI on Derivatives, net of Tax (Effective Portion) Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net Amount of Gain (Loss) Recognized in Income of Derivatives (Ineffective Portion) Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net SECURITIES Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] ASSETS Assets [Abstract] Cash and due from banks Cash and Due from Banks Interest-bearing deposits with other banks Interest-bearing Deposits with Other Banks Interest-bearing deposits with other banks. Cash and cash equivalents Cash, Cash Equivalents, and Federal Funds Sold Interest bearing time deposits with other banks Interest-bearing Deposits in Banks and Other Financial Institutions Securities held to maturity, at amortized cost (fair value of $4,117 and $4,152 at March 31, 2019 and December 31, 2018, respectively) Held-to-maturity Securities Other Bank Stock, at cost Other Bank Stock Other Bank Stock Loans receivable, net of unearned income Loans and Leases Receivable, Net of Deferred Income Less: allowance for loan losses Net loans receivable Loans Receivable, Net Foreclosed real estate Real Estate Acquired Through Foreclosure Premises and equipment, net Property, Plant and Equipment, Net Accrued interest receivable Interest Receivable Goodwill and intangibles Intangible Assets, Net (Including Goodwill) Other assets Other Assets Total Assets LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Equity [Abstract] Liabilities: Liabilities [Abstract] Deposits: Deposits [Abstract] Non-interest bearing Noninterest-bearing Deposit Liabilities Interest bearing Interest-bearing Deposit Liabilities Total deposits Deposits Short-term borrowings Short-term Debt Long-term borrowings Long-term Debt Accrued interest payable and other liabilities Accrued Interest Payable And Other Liabilities Accrued Interest Payable and Other Liabilities Subordinated debentures Junior Subordinated Notes Total Liabilities Liabilities Stockholders' Equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, no par value, 1,000,000 shares authorized; none issued Preferred Stock, Value, Issued Common stock, no par value, 10,000,000 shares authorized; 9,470,730 and 9,532,943 shares issued and 9,470,730 and 9,532,943 shares outstanding at March 31, 2019 and December 31, 2018, respectively Common Stock, Value, Issued Treasury stock, at cost; 88,091 shares at March 31, 2019 Treasury Stock, Value Deferred compensation obligation under Rabbi Trust Compensation and Benefits Trust Retained earnings Retained Earnings (Accumulated Deficit) Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Stock held by Rabbi Trust Deferred Compensation Equity Total Stockholders' Equity Stockholders' Equity Attributable to Parent Total Liabilities and Stockholders' Equity Liabilities and Equity OTHER COMPREHENSIVE INCOME Other Comprehensive Income, Noncontrolling Interest [Text Block] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Impaired loans, fair value EARNINGS PER SHARE Earnings Per Share [Text Block] Summary of Information Regarding Stock Option Plans Share-based Compensation, Stock Options, Activity [Table Text Block] Summary of Information Regarding Restricted Stock Activity Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] Statement of Comprehensive Income [Abstract] INTEREST INCOME Interest and Dividend Income, Operating [Abstract] Loans receivable, including fees Interest and Fee Income, Loans and Leases 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 bearing deposits Interest Income, Domestic Deposits Total Interest Income Interest and Dividend Income, Operating INTEREST EXPENSE Interest Expense [Abstract] Deposits Interest Expense, Deposits Borrowings Interest Expense, Borrowings Subordinated debentures Interest Expense, Junior Subordinated Debentures Total Interest Expense Interest Expense Net Interest Income PROVISION FOR LOAN LOSSES Provision for Loan and Lease Losses Net Interest Income after Provision for Loan Losses Interest Income (Expense), after Provision for Loan Loss OTHER INCOME Noninterest Income [Abstract] OTHER EXPENSES Noninterest Expense [Abstract] Salaries and employee benefits Labor and Related Expense Occupancy, net Occupancy, Net Data processing Information Technology and Data Processing Furniture and equipment Equipment Expense Advertising and promotion Marketing and Advertising Expense Professional fees Professional Fees Director fees Noninterest Expense Directors Fees FDIC assessment Federal Deposit Insurance Corporation Premium Expense Insurance General Insurance Expense Stationary and supplies Supplies and Postage Expense Merger-related expenses Business Combination, Integration Related Costs Loan collection costs Loan Processing Fee Net expenses and write-downs related to foreclosed real estate Foreclosed Real Estate Expense Amortization of intangible assets Amortization of Intangible Assets Other Other Noninterest Expense Total Other Expenses Noninterest Expense Income before Income Taxes EXPENSE FOR INCOME TAXES Net Income Net Income (Loss) Attributable to Parent OTHER COMPREHENSIVE INCOME: Other Comprehensive Income (Loss), Tax [Abstract] Unrealized gain (loss) on available for sale securities arising during the period Fair value adjustments on derivatives Reclassification adjustment for net (gain) on securities transactions included in net income Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Income tax related to items of other comprehensive (loss) income Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent EARNINGS PER SHARE Earnings Per Share, Basic [Abstract] Basic (in dollars per share) Diluted (in dollars per share) Earnings Per Share, Diluted Total loans for which accrual of interest has been discounted Loans and Leases Receivable, Nonperforming, Nonaccrual of Interest Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Unvested restricted stock, beginning of year (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Unvested restricted stock, end of period (in shares) Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Unvested restricted stock, beginning of year (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Forfeited (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value 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 Unvested restricted stock, end of period (in dollars per share) Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Notional/ Contract Amount Other Assets Derivative Asset Other Liabilities Derivative Liability Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward] Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward] Accretable yield, beginning balance Acquisition of impaired loans Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Additions Accretable yield amortized to interest income Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion Reclassification from non-accretable difference Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference Accretable yield, ending balance Shares outstanding (weighted average) (in shares) Weighted Average Number of Shares Outstanding, Basic Shares held by Rabbi Trust (in shares) Common Stock, Shares Held in Employee Trust, Shares Share liability under deferred compensation agreement (in shares) Deferred Compensation Arrangement with Individual, Shares Issued Basic earnings per share: Net earnings applicable to common stockholders Net Income (Loss) Available to Common Stockholders, Basic Basic earnings per share (in shares) Effect of dilutive securities: Dilutive Securities, Effect on Basic Earnings Per Share [Abstract] Unvested stock awards (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Diluted earnings per share: Earnings Per Share, Diluted [Abstract] Net income applicable to common stockholders and assumed conversions Net Income (Loss) Available to Common Stockholders, Diluted Diluted earnings per share (in shares) Weighted Average Number of Shares Outstanding, Diluted Diluted earnings per share (in dollars per share) Shares of common stock outstanding not included in the computation of diluted EPS (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Federal Home Loan Bank Branch [Axis] Federal Home Loan Bank Branch [Axis] Federal Home Loan Bank Branch [Domain] Federal Home Loan Bank Branch [Domain] FHLBNY Federal Home Loan Bank of New York [Member] Counterparty Name [Axis] Counterparty Name [Axis] Counterparty Name [Domain] Counterparty Name [Domain] ACBB Atlantic Central Bankers Bank [Member] Atlantic Central Bankers Bank [Member] Federal funds rate Federal Funds Rate [Member] Federal Funds Rate [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Secured borrowing potential Line of Credit Facility, Maximum Borrowing Capacity Residential and commercial mortgage loans pledged Loans Pledged as Collateral Ability to borrow capacity Line of Credit Facility, Remaining Borrowing Capacity Term advances Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances Weighted average interest rate Federal Home Loan Bank, Advances, Branch of FHLB Bank, Interest Rate Long-term fixed rate advances Long-term Line of Credit Composition of Net Loans Receivable Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Schedule of Changes in Accretable Yield Schedule of Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement [Table Text Block] Schedule of Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement [Table Text Block] Amortized Cost and Approximate Fair Value of Securities Available For Sale Available-for-sale Securities [Table Text Block] Amortized Cost and Fair Value of Securities By Contractual Maturity of Available-For-Sale Securities Investments Classified By Contractual Maturity Date, Available-For-Sale Securities [Table Text Block] Investments Classified By Contractual Maturity Date, Available-For-Sale Securities [Table Text Block] Temporarily Impaired Gross Unrealized Losses And Fair Value of Available-For-Sale Securities Schedule Of Temporary Impairment Losses, Available-For-Sale Securities [Table Text Block] Schedule Of Temporary Impairment Losses, Available-For-Sale Securities [Table Text Block] Amortized Cost and Approximate Fair Value of Securities Held-To-Maturity Held-to-maturity Securities [Table Text Block] Amortized Cost and Fair Value of Securities By Contractual Maturity of Held-To-Maturity Securities Investments Classified By Contractual Maturity Date, Held-To-Maturity Securities [Table Text Block] Investments Classified By Contractual Maturity Date, Held-To-Maturity Securities [Table Text Block] Statement of Cash Flows [Abstract] Cash Flows from Operating Activities Net Cash Provided by (Used in) Operating Activities [Abstract] Net income 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] Provision for loan losses Depreciation and amortization Net amortization of securities premiums and discounts Accretion (Amortization) of Discounts and Premiums, Investments Amortization of subordinated debt issuance costs Amortization of Debt Issuance Costs Net realized gain on sale of foreclosed real estate Gains (Losses) on Sales of Other Real Estate Write-downs of and provisions for foreclosed real estate Impairment of Real Estate Deferred income tax (benefit) expense Increase (Decrease) in Deferred Income Taxes Earnings on bank-owned life insurance Compensation expense for stock options and stock awards Share-based Compensation (Increase) decrease in assets: Increase (Decrease) in Operating Capital [Abstract] Accrued interest receivable Increase (Decrease) in Accrued Interest Receivable, Net Other assets Increase (Decrease) in Other Operating Assets Decrease in accrued interest payable and other liabilities Increase (Decrease) In Accrued Interest Payable And Other Liabilities Increase in Accrued Interest Payable and Other Liabilities Net Cash Provided by Operating Activities Net Cash Provided by (Used in) Operating Activities Cash Flows from Investing Activities Net Cash Provided by (Used in) Investing Activities [Abstract] Net cash acquired in acquisition Cash Acquired from Acquisition Securities available for sale: Available-for-sale Securities [Abstract] Purchases Payments to Acquire Available-for-sale Securities Sales Proceeds from Sale of Available-for-sale Securities Maturities, calls and principal repayments Proceeds from Maturities, Prepayments and Calls of Available-for-sale Securities Securities held to maturity: Securities Held to Maturity [Abstract] Securities Held to Maturity [Abstract] Purchases Payments to Acquire Trading Securities Held-for-investment Maturities, calls and principal repayments Proceeds from Maturities, Prepayments and Calls of Held-to-maturity Securities Net increase in loans Payments for (Proceeds from) Loans and Leases Proceeds from the sale of foreclosed real estate Proceeds from Sale of Foreclosed Assets Purchases of bank premises and equipment Payments to Acquire Property, Plant, and Equipment Net decrease (increase) in Federal Home Loan Bank stock Payments for (Proceeds from) Federal Home Loan Bank Stock Net Cash Used in Investing Activities Net Cash Provided by (Used in) Investing Activities Cash Flows from Financing Activities Net Cash Provided by (Used in) Financing Activities [Abstract] Net increase (decrease) in deposits Increase (Decrease) in Deposits Net (decrease) increase in short-term borrowed funds Proceeds from (Repayments of) Short-term Debt Proceeds from long-term borrowings Proceeds from Issuance of Long-term Debt Repayment of long-term borrowings Repayments of Long-term Debt Purchase of treasury stock Payments for Repurchase of Common Stock Dividends paid Payments of Dividends Net Cash Provided by Financing Activities Net Cash Provided by (Used in) Financing Activities Net (decrease) increase in Cash and Cash Equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash and Cash Equivalents - Beginning Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash and Cash Equivalents - Ending Supplementary Cash Flows Information Supplemental Cash Flow Information [Abstract] Interest paid Interest Paid, Net Income taxes paid Income Taxes Paid, Net Operating Leases Lessee Disclosure [Abstract] Operating lease right-of-use asset, net Operating lease liability Supplementary Schedule of Noncash Investing and Financing Activities Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Acquisitions of Community: Noncash or Part Noncash Acquisition, Net Nonmonetary Assets Acquired (Liabilities Assumed) [Abstract] Non-cash assets acquired: Noncash or Part Noncash Acquisition, Value of Assets Acquired [Abstract] Other bank stock Noncash Or Part Noncash Acquisition, Other Bank Stock Acquired Noncash Or Part Noncash Acquisition, Other Bank Stock Acquired Securities available for sale Noncash Or Part Noncash Acquisition, Available-For-Sale Securities Acquired Noncash Or Part Noncash Acquisition, Available-For-Sale Securities Acquired Loans Noncash Or Part Noncash Acquisition, Loans Acquired Noncash Or Part Noncash Acquisition, Loans Acquired Foreclosed real estate Noncash Or Part Noncash Acquisition, Real Estate Acquired Through Foreclosure Noncash Or Part Noncash Acquisition, Real Estate Acquired Through Foreclosure Premises and equipment Noncash or Part Noncash Acquisition, Fixed Assets Acquired Interest receivable Noncash Or Part Noncash Acquisition, Interest Receivable Acquired Noncash Or Part Noncash Acquisition, Interest Receivable Acquired Bank owned life insurance Noncash Or Part Noncash Acquisition, Bank Owned Life Insurance Acquired Noncash Or Part Noncash Acquisition, Bank Owned Life Insurance Acquired Goodwill and intangibles assets Noncash or Part Noncash Acquisition, Intangible Assets Acquired Other assets Noncash or Part Noncash Acquisition, Other Assets Acquired Total non-cash assets acquired Noncash or Part Noncash Acquisition, Value of Assets Acquired Liabilities assumed: Noncash or Part Noncash Acquisition, Value of Liabilities Assumed [Abstract] Deposits Noncash Or Part Noncash Acquisition, Deposits Assumed Noncash Or Part Noncash Acquisition, Deposits Assumed Borrowings Noncash or Part Noncash Acquisition, Debt Assumed Other liabilities Noncash or Part Noncash Acquisition, Other Liabilities Assumed Total liabilities assumed Noncash or Part Noncash Acquisition, Value of Liabilities Assumed Common stock issued for acquisitions Noncash Or Part Noncash Acquisition, Noncash Financial Or Equity Instrument Consideration, Shares Issued, Value Noncash Or Part Noncash Acquisition, Noncash Financial Or Equity Instrument Consideration, Shares Issued, Value Amortized Cost Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract] Due in one year or less Held-to-maturity Securities, Debt Maturities, within One Year, Net Carrying Amount Due after one year through five years Held-to-maturity Securities, Debt Maturities, after One Through Five Years, Net Carrying Amount Due after five years through ten years Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount Due after ten years Held-to-maturity Securities, Debt Maturities, after Ten Years, Net Carrying Amount Fair Value Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Fair Value [Abstract] Due in one year or less Held-to-maturity Securities, Debt Maturities, Next Twelve Months, Fair Value Due after one year through five years Held-to-maturity Securities, Debt Maturities, Year Two Through Five, Fair Value Due after five years through ten years Held-to-maturity Securities, Debt Maturities, Year Six Through Ten, Fair Value Due after ten years Held-to-maturity Securities, Debt Maturities, after Ten Years, Fair Value Total held to maturity securities Measurement Basis [Axis] Measurement Basis [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Carrying Amount Reported Value Measurement [Member] Fair Value Estimate of Fair Value Measurement [Member] Financial assets: Assets, Fair Value Disclosure [Abstract] Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Time deposits with other banks Time Deposits Fair Value Time Deposits Fair Value Securities held to maturity Federal Home Loan Bank stock Investment in Federal Home Loan Bank Stock, Fair Value Disclosure Loans receivable, net of allowance Loans Receivable, Fair Value Disclosure Accrued interest receivable Retained Interest, Fair Value Disclosure Financial liabilities: Liabilities, Fair Value Disclosure [Abstract] Non-maturity deposits Non Maturity Deposits Fair Value Disclosure Non Maturity Deposits Fair Value Disclosure Time deposits Time deposits, fair value disclosure Time deposits, fair value disclosure Short-term borrowings Short-term Debt, Fair Value Long-term borrowings Long-term Debt, Fair Value Subordinated debentures Junior Subordinated Debentures Fair Value Junior Subordinated Debentures Fair Value Accrued interest payable Accrued Liabilities, Fair Value Disclosure Interest rate swaps Schedule Of Available-For-Sale And Held-To-Maturity [Table] Schedule Of Available-For-Sale And Held-To-Maturity [Table] Schedule Of Available-For-Sale And Held-To-Maturity [Table] Schedule Of Available-For-Sale And Held-To-Maturity [Line Items] Schedule Of Available-For-Sale And Held-To-Maturity [Line Items] Schedule Of Available-For-Sale And Held-To-Maturity [Line Items] Available for sale securities carrying value pledged to secure public deposits Available For Sale Securities, Carrying Value Available For Sale Securities, Carrying Value Gross gains on sales of securities available for sale Available-for-sale Securities, Gross Realized Gains Gross losses on sales of securities available for sale (less than in 2016) Available-for-sale Securities, Gross Realized Losses Number of securities with unrealized losses, available-for-sale Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions Fair value of available-for-sale securities Unrealized loss of available-for-sale securities Number of securities with unrealized losses from state and political subdivisions maturity minimum number of years Unrealized Losses From State And Political Subdivisions Maturity Minimum Number Of Years Number of securities with unrealized losses from state and political subdivisions maturity minimum number of years Maturity date (typically greater than) Investment, Maturity Date Investment, Maturity Date Number of securities with unrealized losses, held-to-maturity Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions Branches Banking Branches Banking Branches Entity shares issued per acquiree share (in shares) Business Combination, Consideration Transferred, Equity Interests, Entity Shares Issued Per Acquiree Share Business Combination, Consideration Transferred, Equity Interests, Entity Shares Issued Per Acquiree Share Number of shares issued (in shares) Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Value of common stock issued Business Acquisition, Equity Interest Issued or Issuable, Value Assigned Cash paid for fractional shares Business Acquisition, Equity Interest Fractional Shares Issued, Amount Business Acquisition, Equity Interest Fractional Shares Issued, Amount Stock options total payment Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Merger expenses Business Combination, Acquisition Related Costs Fair value adjustment Other than Temporary Impairment Losses, Investments, Available-for-sale Securities Gross amortized cost basis of acquired loans Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Gross Amortized Cost Basis Amount Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Gross Amortized Cost Basis Amount Amortization period Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Credit Adjustment, Amortization Period Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Credit Adjustment, Amortization Period Interest rate fair value adjustment on general pooled loans Certain Loans Acquired in Transfer Accounted for as Debt Securities, Interest Rate Fair Value Increase (Decrease) Certain Loans Acquired in Transfer Accounted for as Debt Securities, Interest Rate Fair Value Increase (Decrease) Credit fair value adjustment on general pooled loans Certain Loans Acquired in Transfer Accounted for as Debt Securities, Credit Fair Value Increase (Decrease) Certain Loans Acquired in Transfer Accounted for as Debt Securities, Credit Fair Value Increase (Decrease) Expected term of acquired loans Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Expected Term of Loans Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Expected Term of Loans Premium Business Acquisition, Premium Purchase, Price Premium Business Acquisition, Premium Purchase, Price Premium Amortization period Property, Plant and Equipment, Useful Life Useful life Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Time deposit discount Time Deposit, Discount Time Deposit, Discount Life of deposits Maturity of Time Deposits Acquired borrowings carrying value Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities Acquired at a discount Business Acquisition, Discount Purchase, Price Discount Business Acquisition, Discount Purchase, Price Discount Weighted average interest rate Debt, Weighted Average Interest Rate Fair value adjustment GUARANTEES Guarantees [Text Block] 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] 30-59 Days Past Due Financing Receivables, 30 to 59 Days Past Due [Member] 60-89 days Past Due Financing Receivables, 60 to 89 Days Past Due [Member] Greater Than 90 Days Financing Receivables, Equal to Greater than 90 Days Past Due [Member] Financing Receivable, Recorded Investment, Past Due [Line Items] Financing Receivable, Recorded Investment, Past Due [Line Items] Total Past Due Financing Receivable, Recorded Investment, Past Due Current Notes, Loans and Financing Receivable, Gross, Current Recorded Investment 90 Days and Accruing Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing Assets: Derivative Asset, Fair Value, Amount Not Offset Against Collateral [Abstract] Gross Amounts Recognized Gross Amounts Offset Derivative Asset, Fair Value, Gross Liability Net Amounts Presented Financial Instruments Derivative, Collateral, Obligation to Return Securities Cash Collateral Pledged Derivative, Collateral, Obligation to Return Cash Net Amount Derivative Asset, Fair Value, Amount Offset Against Collateral Liabilities: Derivative Liability, Fair Value, Amount Not Offset Against Collateral [Abstract] Gross Amounts Recognized Gross Amounts Offset Derivative Liability, Fair Value, Gross Asset Net Amounts Presented Financial Instruments Derivative, Collateral, Right to Reclaim Securities Cash Collateral Pledged Derivative, Collateral, Right to Reclaim Cash Net Amount Derivative Liability, Fair Value, Amount Offset Against Collateral Schedule of Fair Value of Derivatives Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Schedule of Derivative Financial Instruments Designated as Cash Flow Hedges Derivative Instruments, Gain (Loss) [Table Text Block] Offsetting Derivatives Liabilities Offsetting Liabilities [Table Text Block] Offsetting Derivative Assets Offsetting Assets [Table Text Block] Schedule of New Accounting Pronouncements and Changes in Accounting Principles Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Number of loans modified by troubled debt restructuring Pre-modification outstanding recorded investment Number of loans with subsequent default Financing Receivable, Modifications, Subsequent Default, Number of Contracts Number of foreclosed properties Real Estate Acquired Through Foreclosure, Number Real Estate Acquired Through Foreclosure, Number Carrying value of collateralized consumer loans Award Type [Axis] Award Type [Axis] Share-based Compensation Arrangements by Share-based Payment Award, Award Type and Plan Name [Domain] Equity Award [Domain] Stock options Employee Stock Option [Member] Restricted stock Restricted Stock [Member] Stock option grants, maximum term, in years Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Vesting period, years Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Stock-based compensation expense Allocated Share-based Compensation Expense Options granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Stock options expected future expense Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options Unrecognized compensation expense, period for recognition Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Restricted stock awards expense Restricted Stock or Unit Expense Unrecognized compensation expense for non-vested restricted stock Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Statement [Table] Statement [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock Common Stock [Member] Deferred Compensation Obligation Under Rabbi Trust Deferred Compensation, Obligation Under Rabbi Trust [Member] Deferred Compensation, Obligation Under Rabbi Trust [Member] Retained Earnings Retained Earnings [Member] Accumulated Other Comprehensive Income AOCI Attributable to Parent [Member] Stock Held by Rabbi Trust Deferred Compensation, Share-based Payments [Member] Treasury Stock Treasury Stock [Member] Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning balance Beginning balance (in shares) Other comprehensive income (loss) Treasury shares purchased Treasury Stock, Value, Acquired, Cost Method Treasury shares purchased (in shares) Treasury Stock, Shares, Acquired Shares issued in merger Stock Issued During Period, Value, Acquisitions Shares issued in merger (in shares) Stock Issued During Period, Shares, Acquisitions Funding of Supplemental Director Retirement Plan Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Restricted stock granted (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Gross Restricted stock forfeited (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Forfeited Compensation expense related to stock option and restricted stock grants Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Dividends declared on common stock Dividends, Common Stock Ending balance Ending balance (in shares) Fair value adjustment on general pooled loans Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Other-than-Temporary Impairment Charges, General Pooled Loans, Credit Fair Value Increase (Decrease) Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Other-than-Temporary Impairment Charges, General Pooled Loans, Credit Fair Value Increase (Decrease) Credit fair value adjustment on purchased credit impaired loans Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Other-than-Temporary Impairment Charges, Credit Fair Value Increase (Decrease) Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Other-than-Temporary Impairment Charges, Credit Fair Value Increase (Decrease) Organization, Consolidation and Presentation of Financial Statements [Abstract] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] New Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Mortgage loans serviced for the benefit of others Mortgage Loans Serviced For The Benefit Of Others Mortgage Loans Serviced For The Benefit Of Others Carrying value of loans acquired Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net Decrease in value Certain Loans Acquired In Transfer Not Accounted For As Debt Securities, Amount Below Carrying Value Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Amount Below Carrying Value SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] 2019 Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year 2020 Lessee, Operating Lease, Liability, Payments, Due Year Two 2021 Lessee, Operating Lease, Liability, Payments, Due Year Three 2022 Lessee, Operating Lease, Liability, Payments, Due Year Four 2023 Lessee, Operating Lease, Liability, Payments, Due Year Five Thereafter Lessee, Operating Lease, Liability, Payments, Due after Year Five Total lease payments (a) (b) Lessee, Operating Lease, Liability, Payments, Due Less imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Concentration Risk [Table] Concentration Risk [Table] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] Sussex County, New Jersey Sussex County New Jersey [Member] Sussex County, New Jersey [Member] Bergen County, New Jersey Bergen County New Jersey [Member] Bergen County, New Jersey [Member] Essex County, New Jersey Essex County, New Jersey [Member] Essex County, New Jersey [Member] Middlesex County, New Jersey Middlesex County, New Jersey [Member] Middlesex County, New Jersey [Member] Union County, New Jersey Union County, New Jersey [Member] Union County, New Jersey [Member] Warren County, New Jersey Warren County New Jersey [Member] Warren County, New Jersey [Member] Queens County, New York Queens County New York [Member] Queens County, New York [Member] Concentration Risk [Line Items] Concentration Risk [Line Items] Number of banking offices Banking Locations Banking locations. Lease liability Summary of Financial Assets Measured on a Recurring Basis Fair Value, Assets Measured on Recurring Basis [Table Text Block] Summary of Financial Assets Measured on a Nonrecurring Basis Fair Value Measurements, Nonrecurring [Table Text Block] Qualitative Information About Level 3 Fair Value Measurements Fair Value Inputs, Assets, Quantitative Information [Table Text Block] Estimated Fair Values of Financial Instruments Fair Value, by Balance Sheet Grouping [Table Text Block]