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Disclosure [Text Block] Expiration period Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period Investments in limited partnerships Deferred Tax Assets, Investments Notes Receivable, Related Parties [Roll Forward] Loans and Leases Receivable, Related Parties [Roll Forward] Ownership [Domain] Ownership [Domain] 2028 Time Deposit Maturities, Year Four Securities carried at fair value through income: Debt Securities, FV-NI [Abstract] Debt Securities, FV-NI [Abstract] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Premises and Equipment, net Property, Plant and Equipment, Policy [Policy Text Block] Intangible assets Deferred Tax Liabilities, Intangible Assets Finite-Lived Intangible Assets, Net [Abstract] Finite-Lived Intangible Assets, Net [Abstract] 2025 Finite-Lived Intangible Asset, Expected Amortization, Year One Target percentage Share-based Compensation Arrangement by Share-based Payment Award, Target Percentage Share-based Compensation Arrangement by Share-based Payment Award, Target Percentage Line of credit outstanding, long-term Long-Term Line of Credit Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Weighted-Average Interest Rate Derivative, Weighted-Average Interest Rate Derivative, Weighted-Average Interest Rate U.S. treasury and government agency securities U.S. treasury and government agency securities US Treasury and Government [Member] Fair value of held to maturity securities Fair Value Held to maturity, fair value Securities held to maturity Debt Securities, Held-to-Maturity, Fair Value Other fee income Fees and Commissions, Other1 Fees and Commissions, Other1 Acquisition Accounting and Acquired Loans Business Combinations Policy [Policy Text Block] Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Due after five years through ten years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years, Amortized Cost Repayments on short-term borrowings Repayments of Short-Term Debt Total income Revenues Savings Interest-Bearing Domestic Deposit, Savings Stock and Incentive Compensation Plans Share-Based Payment Arrangement [Text Block] Annual servicing fee income rate Servicing Fee Income, Rate Servicing Fee Income, Rate Entity Address, City or Town Entity Address, City or Town Leases Lessee, Leases [Policy Text Block] Schedule of Stock Option Activity Share-Based Payment Arrangement, Option, Activity [Table Text Block] Aggregate Intrinsic Value, exercised Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value Mortgage banking revenue Mortgage banking revenue Mortgage Banking Revenue Noninterest income derived from the sale and changes in fair value of residential mortgage loans held for sale and fees for servicing of residential mortgage loans held by third parties. Also includes changes in the fair value of residential mortgage loan commitments and forward sales commitments considered to be derivative instruments. 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