Leases [Abstract] Operating lease expense Operating Lease, Cost Short-term lease expense Short-term Lease, Cost Variable lease expense Variable Lease, Cost Total lease expense Lease, Cost Commitments and Contingencies Disclosure [Abstract] Schedule of Fair Value, Off-balance Sheet Risks [Table] Schedule of Fair Value, Off-balance Sheet Risks [Table] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Commitments to extend credit Commitments to Extend Credit [Member] Undisbursed lines of credit Unused lines of Credit [Member] Undisbursed portions of construction loans Unused Portion of Construction Loans [Member] Unused Portion of Construction Loans [Member] Standby letters of credit and financial guarantees Standby Letters of Credit [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Loss 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Frequency [Domain] Recurring Fair Value, Measurements, Recurring [Member] Other equity securities Equity Securities [Member] Measurement Basis [Axis] Measurement Basis [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Carrying Amount Reported Value Measurement [Member] Fair Value Estimate of Fair Value Measurement [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Level 1 Fair Value, Inputs, Level 1 [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Level 3 Fair Value, Inputs, Level 3 [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Financial assets: Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Cash and due from banks Cash and Due From Banks, Fair Value Disclosure Cash and Due From Banks, Fair Value Disclosure Interest-earning deposits in other banks Interest-earning Deposits in Other Banks, Fair Value Disclosure Interest-earning Deposits in Other Banks, Fair Value Disclosure Federal funds sold Federal Funds Sold, Fair Value Disclosure Federal Funds Sold, Fair Value Disclosure Available-for-sale debt securities Debt Securities, Available-for-sale Equity securities Available-for-sale Securities, Equity Securities Loans, net Loans Receivable, Fair Value Disclosure Federal Home Loan Bank stock Investment in Federal Home Loan Bank Stock, Fair Value Disclosure Accrued interest receivable Accrued Interest Receivable, Fair Value Disclosure Accrued Interest Receivable, Fair Value Disclosure Financial liabilities: Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Deposits Deposits, Fair Value Disclosure Short-term borrowings Federal Home Loan Bank Borrowings, Fair Value Disclosure Junior subordinated deferrable interest debentures Subordinated Debt Obligations, Fair Value Disclosure Accrued interest payable Accrued Interest Payable, Fair Value Disclosure Accrued Interest Payable, Fair Value Disclosure Leases Lessee, Operating Leases [Text Block] Receivables [Abstract] Schedule of Financing Receivable, Troubled Debt Restructurings [Table] Schedule of Financing Receivable, Troubled Debt Restructurings [Table] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Commercial Real Estate Commercial Real Estate Portfolio Segment [Member] Commercial Commercial Portfolio Segment [Member] Real Estate Real Estate Portfolio Segment [Member] Real Estate Portfolio Segment [Member] Consumer Consumer Portfolio Segment [Member] Commercial and Real Estate Commercial and Real Estate Portfolio Segments [Member] Commercial and Real Estate Portfolio Segments [Member] Class of Financing Receivable [Axis] Class of Financing Receivable, Type [Axis] Class of Financing Receivable [Domain] Class of Financing Receivable, Type [Domain] Commercial and industrial Commercial and Industrial [Member] Commercial and Industrial [Member] Commercial real estate Commercial Real Estate [Member] Agricultural real estate Agricultural Real Estate [Member] Agricultural Real Estate [Member] Equity loans and lines of credit Equity Loans and Lines of Credit [Member] Equity Loans and Lines of Credit [Member] Financing Receivable, Modifications [Line Items] Financing Receivable, Modifications [Line Items] Outstanding Recorded Investment Financing Receivable, Modifications, Recorded Investment Reserves specific to modified loans Financing Receivable, Modifications, Related Allowance Financing Receivable, Modifications, Related Allowance Loans and Leases Receivable, Impaired, Commitment to Lend Loans and Leases Receivable, Impaired, Commitment to Lend Number of Loans Financing Receivable, Modifications, Number of Contracts Pre-Modification Outstanding Recorded Investment Financing Receivable, Modifications, Pre-Modification Recorded Investment Principal Modification Financing Receivable, Modifications, Amount of Principal Modifications Made During Period Financing Receivable, Modifications, Amount of Principal Modifications Made During Period Post Modification Outstanding Recorded Investment Financing Receivable, Modifications, Post-Modification Recorded Investment Defaults on troubled debt restructurings Financing Receivable, Modifications, Subsequent Defaults During Period, Number of Contracts Financing Receivable, Modifications, Subsequent Defaults During Period, Number of Contracts Earnings Per Share [Abstract] Schedule of Earnings Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] 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] Number of primary components Loans and Leases Receivable, Allowance, Number of Components Loans and Leases Receivable, Allowance, Number of Components Lookback period used in reserve analysis Financing Receivable, Allowance for Credit Losses, Methodology Change, Number of Rolling Quarters Used in Analysis Financing Receivable, Allowance for Credit Losses, Methodology Change, Number of Rolling Quarters Used in Analysis Financing Receivable, Allowance for Credit Losses [Roll Forward] Financing Receivable, Allowance for Credit Losses [Roll Forward] Allowance for credit losses, beginning balance Financing Receivable, Allowance for Credit Losses Provision charged to operations Provision for Loan, Lease, and Other Losses Losses charged to allowance Financing Receivable, Allowance for Credit Losses, Write-downs Recoveries Financing Receivable, Allowance for Credit Losses, Recovery Allowance for credit losses, ending balance Ending balance: individually evaluated for impairment Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment Ending balance: collectively evaluated for impairment Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment Operating leases Operating Lease Liabilities, Payments Due [Abstract] 2019 (remaining) 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 Lessee, Operating Lease, Liability, Payments, Due Less: imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Present value of operating lease liabilities Operating Lease, Liability Statement of Stockholders' Equity [Abstract] Cash dividends per common share (in dollars per share) Common Stock, Dividends, Per Share, Cash Paid Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Axis] Award Type [Domain] Equity Award [Domain] Stock Options Employee Stock Option [Member] Restricted Common Stock Restricted Stock [Member] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Employee Stock Purchase Plan (ESPP) Employee Stock Purchase Plan (ESPP) [Member] Employee Stock Purchase Plan (ESPP) [Member] 2005 Plan Two Thousand Five Plan [Member] Two Thousand Five Plan [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 plans Share-based Compensation Arrangement by Share-based Payment Award, Number of Plans Share-based Compensation Arrangement by Share-based Payment Award, Number of Plans Share-based compensation expense Allocated Share-based Compensation Expense Tax benefit of stock option compensation expense Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Payroll deductions Employee Stock Purchase Plan (ESPP), Payroll Deductions Employee Stock Purchase Plan (ESPP), Payroll Deductions Offering period Employee Stock Purchase Plan (ESPP), Offering Period Employee Stock Purchase Plan (ESPP), Offering Period Discount from market price Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date Shares reserved for plan (in shares) Common Stock, Capital Shares Reserved for Future Issuance Shares available for grant (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Unrecognized compensation cost related to non-vested share-based compensation arrangements Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options Award vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 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 Nonvested and expected to vest (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Other than Options, Nonvested and Expected to Vest, Exercisable, Number Share-based Compensation Arrangement by Share-based Payment Award, Equity Other than Options, Nonvested and Expected to Vest, Exercisable, Number Weighted average remaining period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms Intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested Banking and Thrift [Abstract] Schedule of Federal Home Loan Bank Advances, by Branch of FHLB Bank [Table] Schedule of Federal Home Loan Bank Advances, by Branch of FHLB Bank [Table] Federal Home Loan Bank Branch [Axis] Federal Home Loan Bank Branch [Axis] Federal Home Loan Bank, Advances, Branch of FHLB Bank, State [Domain] Federal Home Loan Bank Branch [Domain] San Fransisco Branch Federal Home Loan Bank of San Francisco [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Federal Home Loan Bank Advances Federal Home Loan Bank Advances [Member] Investment Type [Axis] Investment Type [Axis] Investment Type Categorization [Domain] Investments [Domain] Securities Pledged as Collateral Debt Securities [Member] Borrowing Arrangements Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] Advances from FHLB Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances Loans Pledged as Collateral Loans Pledged as Collateral Remaining borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Investments securing FHLB advances, amortized cost Debt Securities, Available-for-sale, Amortized Cost Federal funds purchased Federal Funds Purchased Statement of Financial Position [Abstract] ASSETS Assets [Abstract] Cash and due from banks Cash and Due from Banks Interest-earning deposits in other banks Interest-bearing Deposits in Banks and Other Financial Institutions Federal funds sold Federal Funds Sold Total cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Available-for-sale debt securities Loans, less allowance for credit losses of $9,118 at March 31, 2019 and $9,104 at December 31, 2018 Loans and Leases Receivable, Net Amount Bank premises and equipment, net Property, Plant and Equipment, Net Bank-owned life insurance Bank Owned Life Insurance Federal Home Loan Bank stock Federal Home Loan Bank Stock Goodwill Goodwill Core deposit intangibles Finite-Lived Intangible Assets, Net Accrued interest receivable and other assets Accrued Interest Receivable and Other Assets Carrying amount as of the balance sheet date of interest earned but not received. Also, represents the carrying amount of the sum of assets not individually reported in the financial statements, or separately disclosed in the notes. Total assets Assets LIABILITIES AND SHAREHOLDERS’ EQUITY Liabilities and Equity [Abstract] Deposits: Deposits [Abstract] Non-interest bearing Noninterest-bearing Deposit Liabilities, Domestic Interest bearing Interest-bearing Deposit Liabilities, Domestic Total deposits Deposits Short-term borrowings Federal Home Loan Bank, Advances, Maturities Summary, Due in Next Twelve Months Junior subordinated deferrable interest debentures Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust Accrued interest payable and other liabilities Accrued Interest Payable and Other Liabilities Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Also, represents the carrying value of the sum of liabilities not individually reported in the financial statements, or separately disclosed in the notes. Total liabilities Liabilities Commitments and contingencies (Note 7) Commitments and Contingencies Shareholders’ equity: Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Preferred stock, no par value; 10,000,000 shares authorized, none issued and outstanding Preferred Stock, Value, Issued Common stock, no par value; 80,000,000 shares authorized; issued and outstanding: 13,680,930 at March 31, 2019 and 13,754,965 at December 31, 2018 Common Stock, Value, Issued Retained earnings Retained Earnings (Accumulated Deficit) Accumulated other comprehensive income (loss), net of tax Accumulated Other Comprehensive Income (Loss), Net of Tax Total shareholders’ equity Stockholders' Equity Attributable to Parent Total liabilities and shareholders’ equity Liabilities and Equity Investments, Debt and Equity Securities [Abstract] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] U.S. Government agencies US Government Agencies Debt Securities [Member] Obligations of states and political subdivisions US States and Political Subdivisions Debt Securities [Member] U.S. Government sponsored entities and agencies collateralized by residential mortgage obligations Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] Private label mortgage and asset backed securities Mortgage-backed Securities, Issued by Private Enterprises [Member] Schedule of Available-for-sale Securities Debt Securities, Available-for-sale [Line Items] Less than 12 Months, Fair Value Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months Less than 12 Months, Unrealized Losses Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 12 Months or More, Fair Value Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer 12 Months or More, Unrealized Losses Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Total Fair Value Debt Securities, Available-for-sale, Unrealized Loss Position Total Unrealized Losses Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss Basic Earnings Per share Earnings Per Share, Basic [Abstract] Net income Net Income (Loss) Available to Common Stockholders, Basic Weighted average shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Basic earnings per share (in dollars per share) Earnings Per Share, Basic Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward] Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward] Beginning balance Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held Amounts related to credit loss for which an OTTI charge was not previously recognized Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, No Previous Impairment Increases to the amount related to credit loss for which OTTI was previously recognized Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, Additional Credit Losses Realized gain for securities sold Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Securities Sold Ending balance Loans and Leases Receivable Disclosure [Abstract] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Agricultural production Agricultural Land and Production [Member] Agricultural land and production [Member] Owner occupied Owner Occupied Real Estate [Member] Owner Occupied Real Estate [Member] Real estate construction and other land loans Real Estate Construction and Other Land Loans [Member] Real Estate Construction and Other Land Loans [Member] Other real estate Other Real Estate [Member] Other Real Estate [Member] Consumer and installment Consumer and Installment [Member] Consumer and Installment [Member] Small Business Administration programs Small Business Administration Programs [Member] Small Business Administration Programs [Member] Loans Accounts, Notes, Loans and Financing Receivable [Line Items] Loans Financing Receivable, Gross % of Total Loans Loans and Leases Receivable, Percentage of Gross Loans Loans and Leases Receivable, Percentage of Gross Loans Deferred loan fees, net Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums Total gross loans Loans and Leases Receivable, Gross Allowance for credit losses Loans and Leases Receivable, Allowance Total loans Amount secured by government guarantees Loans and Leases Receivable, Gross, Carrying Amount, Covered Percent secured by government guarantees Loans and Leases Receivable, Gross, Carrying Amount, Percent Covered Loans and Leases Receivable, Gross, Carrying Amount, Percent Covered Stock option activity Share-based Compensation, Stock Options, Activity [Table Text Block] Restricted common stock activity Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] Corporate debt securities Corporate Debt Securities [Member] Amortized Cost Gross Unrealized Gains Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Gross Unrealized Losses Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 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 Available-for-sale securities Available-for-sale Securities Loans and Allowance for Credit Losses Allowance for Credit Losses [Text Block] Available-for-sale securities reconciliation Schedule of Available-for-sale Securities Reconciliation [Table Text Block] Realized gains and losses Schedule of Realized Gain (Loss) [Table Text Block] Securities in a continuous unrealized loss position Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block] Credit losses recorded in earnings Other than Temporary Impairment, Credit Losses Recognized in Earnings [Table Text Block] Investments by contractual maturity Investments Classified by Contractual Maturity Date [Table Text Block] 2019 Operating Leases, Future Minimum Payments Due, Next Twelve Months 2020 Operating Leases, Future Minimum Payments, Due in Two Years 2021 Operating Leases, Future Minimum Payments, Due in Three Years 2022 Operating Leases, Future Minimum Payments, Due in Four Years 2023 Operating Leases, Future Minimum Payments, Due in Five Years Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Total Operating Leases, Future Minimum Payments Due Total Recorded Investment Impaired Financing Receivable, Recorded Investment Related Allowance Impaired Financing Receivable, Related Allowance Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Nonrecurring Fair Value, Measurements, Nonrecurring [Member] Class of Financing Receivable, Type [Axis] Class of Financing Receivable, Type [Domain] Impaired Financing Receivable Impaired Financing Receivable [Member] Impaired Financing Receivable [Member] Asset Class [Axis] Asset Class [Axis] Asset Class [Domain] Asset Class [Domain] 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] Equity securities Equity securities Assets, fair value Assets, Fair Value Disclosure Valuation allowance Loans, charge-offs Allowance for Loan and Lease Losses, Write-offs Liabilities fair value disclosure Financial and Nonfinancial Liabilities, Fair Value Disclosure Estimated Fair Value of Financial Instruments Fair Value, by Balance Sheet Grouping [Table Text Block] Fair Value of Assets on a Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Fair Value of Assets on a Non-recurring Basis Fair Value Measurements, Nonrecurring [Table Text Block] Debt Securities, Available-for-sale [Abstract] Debt Securities, Available-for-sale [Abstract] Proceeds from sales or calls Proceeds from Sale of Debt Securities, Available-for-sale Gross realized gains from sales or calls Available-for-sale Securities, Gross Realized Gains Gross realized losses from sales or calls Available-for-sale Securities, Gross Realized Losses Share-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Statement of Cash Flows [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities [Abstract] Net income Net Income (Loss) Attributable to Parent 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] Net decrease (increase) in deferred loan costs Amortization of Deferred Loan Origination Fees, Net Depreciation Depreciation, Nonproduction Accretion Accretion (Amortization) of Discounts and Premiums, Investments Amortization Amortization Stock-based compensation Share-based Compensation (Reversal of) provision for credit losses Provision for Loan and Lease Losses Net realized gains on sales of available-for-sale investment securities Available-for-sale Securities, Gross Realized Gain (Loss), Excluding Other than Temporary Impairments Net change in equity securities Increase (Decrease) in Debt Securities, Trading, and Equity Securities, FV-NI Increase in bank-owned life insurance, net of expenses Life Insurance, Corporate or Bank Owned, Change in Value Net (increase) decrease in accrued interest receivable and other assets Increase (Decrease) in Accrued Interest Receivable and Other Operating Assets, Net The net change during the reporting period in the amount due from borrowers for interest payments and other operating assets not otherwise defined in the taxonomy. Net increase (decrease) in accrued interest payable and other liabilities Increase (Decrease) in Interest Payable and Other Operating Liabilities, Net This element represents net increase or decrease in accrued interest payable and other liabilities not otherwise defined in the taxonomy. Deferred income tax (benefit) expense Increase (Decrease) in Deferred Income Taxes 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] Purchases of available-for-sale investment securities Payments to Acquire Available-for-sale Securities Proceeds from sales or calls of available-for-sale investment securities Proceeds from Sale of Available-for-sale Securities Proceeds from maturity and principal repayments of available-for-sale investment securities Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale Net increase in loans Payments for (Proceeds from) Loans and Leases Purchases of premises and equipment Payments to Acquire Property, Plant, and Equipment Purchases of bank-owned life insurance Payment to Acquire Life Insurance Policy, Investing Activities 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 demand, interest bearing and savings deposits Net Increase (Decrease) in Demand Interest Bearing and Savings Deposits The net cash inflow (outflow) in the total of all interest bearing deposit accounts, classified as cash flows from financing activities. Net increase (decrease) in time deposits Increase (Decrease) in Time Deposits Proceeds from short-term borrowings from Federal Home Loan Bank Proceeds from FHLBank Borrowings, Financing Activities Repayments of short-term borrowings to Federal Home Loan Bank Payments of FHLBank Borrowings, Financing Activities Proceeds of borrowings from other financial institutions Proceeds from Deposits with Other Institutions Repayments of borrowings from other financial institutions Repayments of Other Debt Purchase and retirement of common stock Payments for Repurchase of Common Stock Proceeds from stock issued under employee stock purchase plan Proceeds from Stock Plans Proceeds from exercise of stock options Proceeds from Stock Options Exercised Cash dividend payments on common stock Payments of Ordinary Dividends, Common Stock Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Increase (decrease) in cash and cash equivalents Net Cash Provided by (Used in) Continuing Operations CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD CASH AND CASH EQUIVALENTS AT END OF PERIOD SUPPLEMENTAL DISCLOSURE OF CASH FLOWS INFORMATION: Supplemental Cash Flow Information [Abstract] Cash paid during the period for: Cash Paid [Abstract] Interest Interest Paid, Excluding Capitalized Interest, Operating Activities Income taxes Income Taxes Paid, Net Operating cash flows from operating leases Operating Lease, Payments Non-cash investing and financing activities: Noncash Investing and Financing Items [Abstract] Initial recognition of operating lease right-of-use assets Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Purchases of available-for-sale investment securities, not yet settled Purchases of Available-for-sale Securities, Not yet Settled Purchases of Available-for-sale Securities, Not yet Settled Allowance for credit losses on loans Preferred stock, liquidation preference (in dollars per share) Preferred Stock, Liquidation Preference Per Share Preferred stock, authorized (in shares) Preferred Stock, Shares Authorized Preferred stock, issued (in shares) Preferred Stock, Shares Issued Preferred stock, outstanding (in shares) Preferred Stock, Shares Outstanding 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 Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Statement [Table] Statement [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock Common Stock [Member] Retained Earnings Retained Earnings [Member] Accumulated Other Comprehensive Income (Loss) (Net of Taxes) AOCI Attributable to Parent [Member] Statement [Line Items] Statement [Line Items] Balance Balance (in shares) Shares, Outstanding Cumulative effect of equity securities gains reclassified Cumulative Effect of New Accounting Principle in Period of Adoption Adjusted Balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance Net income Other comprehensive income Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax Cash dividend Dividends, Common Stock, Cash Stock-based compensation expense Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Restricted stock granted, (forfeited) and related tax benefit (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Restricted stock granted, (forfeited) and related tax benefit Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Stock issued under employee stock purchase plan (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Stock issued under employee stock purchase plan Stock Issued During Period, Value, Employee Stock Purchase Plan Stock awarded to employees Stock Issued During Period, Shares, Share-based Compensation, Gross Stock awarded to employees Stock Issued During Period, Value, Share-based Compensation, Gross Stock options exercised and related tax benefit (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Stock options exercised and related tax benefit Stock Issued During Period, Value, Stock Options Exercised Repurchase and retirement of common stock (in shares) Stock Repurchased and Retired During Period, Shares Repurchase and retirement of common stock Stock Repurchased and Retired During Period, Value Balance Balance (in shares) Loans Ending balance: individually evaluated for impairment Financing Receivable, Individually Evaluated for Impairment Ending balance: collectively evaluated for impairment Financing Receivable, Collectively Evaluated for Impairment Earnings Per Share Earnings Per Share [Text Block] Future minimum lease payments on noncancelable operating leases Lessee, Operating Lease, Liability, Maturity [Table Text Block] Minimum future rental payments under noncancelable operating leases Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Lease cost Lease, Cost [Table Text Block] Other lease information Assets And Liabilities, Lessee [Table Text Block] Assets And Liabilities, Lessee [Table Text Block] Investments Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Within one year, amortized cost Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost Within one year, estimated fair value Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value After one year through five years, amortized cost Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost After one year through five years, estimated fair value Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value After five years through ten years, amortized cost Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost After five years through ten years, estimated fair value Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value After ten years, amortized cost Debt Securities, Available-for-sale, Allocated and Single Maturity Date, Maturity, after 10 Years, Amortized Cost After ten years, estimated fair value Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value Total securities with single maturity date, amortized cost Available-for-sale Securities, Debt Maturities, with Single Maturity Date, Amortized Cost Basis Available-for-sale Securities, Debt Maturities, with Single Maturity Date, Amortized Cost Basis Total securities with single maturity date, estimated fair value Available-for-sale Securities, Debt Maturities, with Single Maturity Date, Fair Value Available-for-sale Securities, Debt Maturities, with Single Maturity Date, Fair Value Investment securities not due at a single maturity date, amortized cost Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Amortized Cost Investment securities not due at a single maturity date, estimated fair value Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Fair Value Debt securities, amortized cost Weighted average remaining lease term, in years Operating Lease, Weighted Average Remaining Lease Term Weighted average discount rate Operating Lease, Weighted Average Discount Rate, Percent Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Operating lease liabilities Income Statement [Abstract] INTEREST INCOME: Interest and Dividend Income, Operating [Abstract] Interest and fees on loans Interest and Fee Income, Loans and Leases Interest on deposits in other banks Interest Income, Deposits with Financial Institutions Interest and dividends on investment securities: Interest and Dividend Income, Securities, by Taxable Status [Abstract] Taxable Interest Income, Securities, Operating, Taxable Exempt from Federal income taxes Interest Income, Securities, Operating, Tax Exempt Total interest income Interest and Dividend Income, Operating INTEREST EXPENSE: Interest Expense [Abstract] Interest on deposits Interest Expense, Domestic Deposits Interest on junior subordinated deferrable interest debentures Interest Expense, Junior Subordinated Debentures Other Interest Expense, Other Total interest expense Interest Expense Net interest income before provision for credit losses Interest Income (Expense), Net PROVISION FOR (REVERSAL OF) CREDIT LOSSES Net interest income after provision for credit losses Interest Income (Expense), after Provision for Loan Loss NON-INTEREST INCOME: Noninterest Income [Abstract] Service charges Service Charges Service Charges Appreciation in cash surrender value of bank-owned life insurance Bank Owned Life Insurance Income Interchange fees Interchange Fees Interchange Fees Net realized gains on sales of investment securities Debt and Equity Securities, Gain (Loss) Federal Home Loan Bank dividends Dividends Federal Home Loan Bank Stocks This element represents the amount of dividend income recognized during the period from stock owned in Federal Home Loan Bank. Loan placement fees Loan Placement Fees This element relates to loan placement fee income which is earned from the brokerage of single-family residential mortgage loans. Other income Noninterest Income, Other Operating Income Total non-interest income Noninterest Income NON-INTEREST EXPENSES: Noninterest Expense [Abstract] Salaries and employee benefits Labor and Related Expense Occupancy and equipment Occupancy, Net Professional services Professional Fees Data processing Information Technology and Data Processing Regulatory assessments Regulatory Assessments This element represents the expenses incurred which relate to assessments by regulatory authorities. ATM/Debit card expenses ATM and Debit Card Expenses ATM and Debit Card Expenses License and maintenance contracts License and Maintenance Contract Costs License and Maintenance Contract Costs Directors’ expenses Directors' Expenses Directors' Expenses Advertising Advertising Expense Internet banking expense Internet Banking Expense Internet Banking Expense Acquisition and integration Business Combination, Acquisition Related Costs Amortization of core deposit intangibles Amortization of Intangible Assets Other Other Noninterest Expense Total non-interest expenses Noninterest Expense Income before provision for income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Provision for income taxes Income Tax Expense (Benefit) Net income Earnings per common share: Basic earnings per common share (in dollars per share) Weighted average common shares used in basic computation (in shares) Diluted earnings per common share (in dollars per share) Earnings Per Share, Diluted Weighted average common shares used in diluted computation (in shares) Weighted Average Number of Shares Outstanding, Diluted Schedule of Impaired Financing Receivable [Table] Schedule of Impaired Financing Receivable [Table] Financing Receivable, Impaired [Line Items] Financing Receivable, Impaired [Line Items] Recorded Investment, With no related allowance recorded Impaired Financing Receivable, with No Related Allowance, Recorded Investment Unpaid Principal Balance, With no related allowance recorded Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance Cash flows expected to be collected at acquisition Impaired Financing Receivable, with Related Allowance, Recorded Investment Unpaid Principal Balance, With an allowance recorded Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance Total Recorded Investment Total Unpaid Principal Balance Impaired Financing Receivable, Unpaid Principal Balance Average Recorded Investment, With no related allowance recorded Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment Interest Income Recognized, With no related allowance recorded Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method Average Recorded Investment, With an allowance recorded Impaired Financing Receivable, with Related Allowance, Average Recorded Investment Interest Income Recognized, With an allowance recorded Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method Average Recorded Investment, Total Impaired Financing Receivable, Average Recorded Investment Interest Income Recognized, Total Impaired Financing Receivable, Interest Income, Accrual Method Forgone interest on nonaccrual loans Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans Diluted Earnings Per share Earnings Per Share, Diluted [Abstract] Net income available to common shareholders Effect of dilutive stock options (in shares) Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants Weighted average shares of common stock and common stock equivalents (in shares) Diluted earnings per share (in dollars per share) Anti-dilutive options and restricted stock awards (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 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 Past Due 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] Past due Financing Receivable, Recorded Investment, Past Due Current Financing Receivable, Recorded Investment, Current Recorded Investment Greater Than 90 Days Accruing Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing Non-accrual Financing Receivable, Recorded Investment, Nonaccrual Status Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table] Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table] Credit Quality Indicator [Axis] Internal Credit Assessment [Axis] Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] Pass Pass [Member] Special Mention Special Mention [Member] Substandard Substandard [Member] Doubtful Doubtful [Member] Financing Receivable, Recorded Investment Financing Receivable, Recorded Investment [Line Items] Borrowing Arrangements Federal Home Loan Bank Advances, Disclosure [Text Block] Accounting Policies [Abstract] Basis of Presentation Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Stock option activity Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Options outstanding (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Options exercised (in shares) Options forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Options outstanding (in shares) Options vested or expected to vest (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Options exercisable (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number Stock option activity, weighted average exercise price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Options Outstanding, weighted average exercise price (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Options exercised, weighted average exercise price (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Options forfeited, weighted average exercise price (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Options Outstanding, weighted average exercise price (in dollars per share) Options vested or expected to vest, weighted average exercise price (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Options exercisable, weighted average exercise price (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price Options outstanding, weighted average remaining contractual term Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Options vested or expected to vest, weighted average remaining contractual term Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Options exercisable, weighted average remaining contractual term Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term Options outstanding, aggregate intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Options vested or expected to vest, aggregate intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Options exercisable, aggregate intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value Intrinsic value of options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Cash received from options exercised Excess tax benefit realized for options exercises Employee Service Share-based Compensation, Tax Benefit from Exercise of Stock Options Fair Value Measurements Financial Instruments Disclosure [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] ASU 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] Duration of Loss [Axis] Duration of Loss [Axis] Duration of Loss [Axis] Duration of Loss [Domain] Duration of Loss [Domain] Duration of Loss [Domain] Less than 12 months Less Than Twelve Months [Member] Less Than Twelve Months [Member] Greater than 12 months Greater Than Twelve Months [Member] Greater Than Twelve Months [Member] Available-for-sale Securities pledged as collateral Pledged Assets Separately Reported, Securities Pledged as Collateral, at Fair Value Unrealized gain (loss) of available-for sale securities Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax AOCI available-for-sale securities adjustment tax Accumulated Other Comprehensive Income Available For Sale Securities Adjustment Tax Accumulated Other Comprehensive Income Available For Sale Securities Adjustment Tax Income tax impact from the reclassification of unrealized net gains on available-for-sale securities to realized net gains on available-for-sale securities Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax Threshold period of value decline in available-for-sale securities to be considered other than temporary impairment Threshold Period of Value Decline in Available-for-sale Securities to be considered Other than Temporary Impairment Threshold Period of Value Decline in Available-for-sale Securities to be considered Other than Temporary Impairment Threshold percentage of value decline in available-for-sale securities to be considered other than temporary impairment Threshold Percentage of Value Decline in Available-for-sale Securities to be considered Other than Temporary Impairment Threshold Percentage of Value Decline in Available-for-sale Securities to be considered Other than Temporary Impairment Threshold amount of value decline in available-for-sale securities to be considered other than temporary impairment Threshold Amount of Value Decline in Available-for-sale Securities to be considered Other than Temporary Impairment Threshold Amount of Value Decline in Available-for-sale Securities to be considered Other than Temporary Impairment Other than temporary impairment losses on investment securities Other than Temporary Impairment Losses, Investments Available-for-sale securities, number of positions Available-for-sale Securities, Number of Positions Available-for-sale Securities, Number of Positions Available-for-sale securities in unrealized loss positions, number of positions Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions Statement of Comprehensive Income [Abstract] Other Comprehensive Income: Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Unrealized gains (losses) on securities: Debt Securities, Available-for-sale, Unrealized Gain (Loss) [Abstract] Unrealized holding gains (losses) arising during the period Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, before Tax Less: reclassification for net gains included in net income Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Other comprehensive income (loss), before tax Other Comprehensive Income (Loss), before Tax Tax (expense) benefit related to items of other comprehensive income Other Comprehensive Income (Loss), Tax Total other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Nonvested outstanding shares beginning balance (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 Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Nonvested outstanding shares ending balance (in shares) Weighted Average Grant-Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Nonvested outstanding shares beginning balance (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 Vested (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Forfeited (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Nonvested outstanding shares ending balance (in dollars per share) Outstanding loans Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Impaired loans Impaired Financing Receivables [Table Text Block] Allowance for credit losses Allowance for Credit Losses on Financing Receivables [Table Text Block] Schedule of receivable by impairment methodology Schedule of Financing Receivables By Impairment Methodology [Table Text Block] Schedule of Financing Receivables By Impairment Methodology [Table Text Block] Loan portfolio by internal risk rating Financing Receivable Credit Quality Indicators [Table Text Block] Loan portfolio by time past due Past Due Financing Receivables [Table Text Block] Troubled debt restructurings Troubled Debt Restructurings on Financing Receivables [Table Text Block] Document Information [Table] Document Information, Document [Axis] Document Information, Document [Axis] Document [Domain] Document [Domain] Document Information [Line Items] Document Information [Line Items] Document and Entity Information [Abstract] -- None. No documentation exists for this element. -- Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Document Type Document Type Document Period End Date Document Period End Date Amendment Flag Amendment Flag Current Fiscal Year End Date Current Fiscal Year End Date Entity Current Reporting Status Entity Current Reporting Status Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Basis of Accounting Basis of Accounting, Policy [Policy Text Block] Segment Reporting Segment Reporting, Policy [Policy Text Block] Concentration of Credit Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Impact of New Financial Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block]