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Document Period End Date Document Period End Date Treasury Stock Treasury Stock, Common [Member] Other Revenue Not from Contract with Customer, Other Entity Central Index Key Entity Central Index Key Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Purchase of bank-owned life insurance Payment to Acquire Life Insurance Policy, Investing Activities Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Gross Carrying Amount Finite-Lived Intangible Assets, Gross Income tax expense Income Tax Expense (Benefit) Outstanding, average remaining contractual term (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Schedule of Credit Exposure of the Loan Portfolio Schedule of Credit Exposure of the Loan Portfolio [Table Text Block] Tabular disclosure for credit exposure of loan portfolio by internally assigned credit grade. (Release of) provision for credit losses Financing Receivable, Credit Loss, Expense (Reversal) Schedule of Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] AFS, 12 months or more, Unrealized Losses Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Equity [Abstract] Equity [Abstract] Operating lease, weighted average remaining lease term Operating Lease, Weighted Average Remaining Lease Term 60-89 Days Financial Asset, 60 to 89 Days Past Due [Member] Fee revenues Fee revenues, in-scope of FASB ASC 606 Revenue from Contract with Customer, Excluding Assessed Tax Payment Delay Payment Deferral [Member] Interest on deposits Interest Expense, Deposits Amendment Flag Amendment Flag Reclassification adjustments for losses (gains) included in net income Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax AFS, Less than 12 months, Unrealized Losses Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Payments to Acquire Businesses, Net of Cash Acquired Payments to Acquire Businesses, Net of Cash Acquired Operating lease, weighted average discount rate, percent Operating Lease, Weighted Average Discount Rate, Percent Cash paid for interest Interest Paid, Excluding Capitalized Interest, Operating Activities Net interest income Intersegment income (expense) Interest Income (Expense), Net Shares issued in period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period Due in 1 year or less Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Treasury stock, shares repurchased (in shares) Treasury Stock, Shares, Acquired Unused loan commitments Unused Commitments to Extend Credit Non- accrual Financing Receivable, Excluding Accrued Interest, Nonaccrual Exercised (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Exercises in Period, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Exercises in Period, Weighted Average Exercise Price Deposits Deposits, Fair Value Disclosure Weighted-average common shares outstanding assuming dilution (in shares) Weighted Average Number of Shares Outstanding, Diluted Amortization expense, rolling year four Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Four Grantee Status [Domain] Grantee Status [Domain] Total interest income Interest and Dividend Income, Operating Revenue from Contract with Customers Revenue from Contract with Customer [Text Block] Available-for-sale securities, gross realized losses Debt Securities, Available-for-Sale, Realized Loss Purchases of premises and equipment, net Payments to Acquire Property, Plant, and Equipment Additional paid-in capital Additional Paid in Capital, Common Stock Additional Paid-in Capital Additional Paid-in Capital [Member] Net (Increase) Decrease In Accounts and Drafts Receivable From Customers Net (Increase) Decrease In Accounts and Drafts Receivable From Customers Net (Increase) Decrease In Accounts and Drafts Receivable From Customers 30-59 Days Financial Asset, 30 to 59 Days Past Due [Member] Total assets Total assets Assets Loss Contingencies [Line Items] Loss Contingencies [Line Items] Cover [Abstract] Subsequent Events Subsequent Events [Text Block] Loans by Type Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Stock-based compensation expense APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Personnel Labor and Related Expense Financial fees Financial Fees [Member] Financial Fees 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 Total undiscounted cash flows Lessee, Operating Lease, Liability, to be Paid Short-term investments Short-Term Investments Pension Plan Pension Plan [Member] Number of troubled debt restructured loans Financing Receivable, Modifications, Number of Contracts Industry Segment Information Segment Reporting Disclosure [Text Block] Revenue, Performance Obligation [Abstract] Revenue, Performance Obligation [Abstract] Cash Flows From Financing Activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Equity Components [Domain] Equity Component [Domain] Investment in bank-owned life insurance Bank Owned Life Insurance Scenario [Axis] Scenario [Axis] Weighted-average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Entity Current Reporting Status Entity Current Reporting Status Amortization expense, rolling year three Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Three Net decrease (increase) in accounts and drafts receivable from customers Increase In Accounts and Drafts Payable Net change during the reporting period in the carrying amount of accounts and drafts payable. Fee Revenue and Other Income: Revenues [Abstract] (Release of) provision for credit losses Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) Comprehensive Income Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Segments [Axis] Segments [Axis] Statement [Line Items] Statement [Line Items] Fair Value Estimate of Fair Value Measurement [Member] Scenario [Domain] Scenario [Domain] Schedule of Debt Schedule of Debt [Table Text Block] Schedule of Investment Securities Debt Securities, Available-for-Sale [Table Text Block] Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Fiscal Year Maturity [Abstract] Number of shares authorized to be repurchased (in shares) Stock Repurchase Program, Number of Shares Authorized to be Repurchased