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Loans, Financial Effect of Modifications Made to Borrowers Experiencing Financial Difficulty (Details) | 3 Months Ended | 9 Months Ended
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Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Interest Rate Reduction [Member] | Commercial Real Estate Nonresidential [Member] |  |  |  |
Financial Effect of Modifications Made to Borrowers Experiencing Financial Difficulty [Abstract] |  |  |  |
Weighted-average contractual interest rate, pre-modification | 7.50% |  | 7.50% |
Weighted-average contractual interest rate, post-modification | 2.00% |  | 2.10% |
Interest Rate Reduction [Member] | Real Estate Mortgage [Member] |  |  |  |
Financial Effect of Modifications Made to Borrowers Experiencing Financial Difficulty [Abstract] |  |  |  |
Weighted-average contractual interest rate, pre-modification | 7.20% | 6.20% | 7.50% | 7.80%
Weighted-average contractual interest rate, post-modification | 3.70% | 3.30% | 4.00% | 4.70%
Interest Rate Reduction [Member] | Home Equity Lines [Member] |  |  |  |
Financial Effect of Modifications Made to Borrowers Experiencing Financial Difficulty [Abstract] |  |  |  |
Weighted-average contractual interest rate, pre-modification | 8.90% |  | 8.90% |
Weighted-average contractual interest rate, post-modification | 7.50% |  | 7.50% |
Term Extension [Member] | Commercial Real Estate Residential [Member] |  |  |  |
Financial Effect of Modifications Made to Borrowers Experiencing Financial Difficulty [Abstract] |  |  |  |
Weighted-average term increased | 3 months 18 days |  | 10 months 24 days | 3 months 18 days
Term Extension [Member] | Commercial Real Estate Nonresidential [Member] |  |  |  |
Financial Effect of Modifications Made to Borrowers Experiencing Financial Difficulty [Abstract] |  |  |  |
Weighted-average term increased | 20 years 2 months 12 days |  | 1 year 4 months 24 days |
Term Extension [Member] | Commercial Other [Member] |  |  |  |
Financial Effect of Modifications Made to Borrowers Experiencing Financial Difficulty [Abstract] |  |  |  |
Weighted-average term increased | 3 months 18 days | 3 months 18 days | 3 years 9 months 18 days | 3 months 18 days
Term Extension [Member] | Real Estate Mortgage [Member] |  |  |  |
Financial Effect of Modifications Made to Borrowers Experiencing Financial Difficulty [Abstract] |  |  |  |
Weighted-average term increased | 4 months 24 days | 1 year 4 months 24 days | 4 months 24 days | 9 months 18 days
Term Extension [Member] | Home Equity Lines [Member] |  |  |  |
Financial Effect of Modifications Made to Borrowers Experiencing Financial Difficulty [Abstract] |  |  |  |
Weighted-average term increased |  |  | 2 years 10 months 24 days | 6 months
Term Extension [Member] | Consumer Direct [Member] |  |  |  |
Financial Effect of Modifications Made to Borrowers Experiencing Financial Difficulty [Abstract] |  |  |  |
Weighted-average term increased |  | 2 months 12 days | 3 months 18 days | 1 month 6 days
Term Extension [Member] | Consumer Indirect [Member] |  |  |  |
Financial Effect of Modifications Made to Borrowers Experiencing Financial Difficulty [Abstract] |  |  |  |
Weighted-average term increased | 1 year 1 month 6 days |  | 1 year | 3 months 18 days
Combination - Term Extension and Interest Rate Reduction [Member] | Commercial Real Estate Residential [Member] |  |  |  |
Financial Effect of Modifications Made to Borrowers Experiencing Financial Difficulty [Abstract] |  |  |  |
Weighted-average contractual interest rate |  |  |  | 8.50%
Weighted-average contractual interest rate, pre-modification |  |  | 9.30% |
Weighted-average contractual interest rate, post-modification |  |  | 8.10% |
Weighted-average term increased |  |  | 15 years 10 months 24 days | 4 years
Combination - Term Extension and Interest Rate Reduction [Member] | Commercial Real Estate Nonresidential [Member] |  |  |  |
Financial Effect of Modifications Made to Borrowers Experiencing Financial Difficulty [Abstract] |  |  |  |
Weighted-average contractual interest rate, pre-modification | 6.50% |  | 6.50% | 6.00%
Weighted-average contractual interest rate, post-modification | 4.50% |  | 4.50% | 8.50%
Weighted-average term increased | 6 months |  | 6 months | 10 years 3 months 18 days
Combination - Term Extension and Interest Rate Reduction [Member] | Commercial Other [Member] |  |  |  |
Financial Effect of Modifications Made to Borrowers Experiencing Financial Difficulty [Abstract] |  |  |  |
Weighted-average contractual interest rate, pre-modification |  | 4.00% | 7.00% | 4.30%
Weighted-average contractual interest rate, post-modification |  | 8.50% | 8.00% | 8.50%
Weighted-average term increased |  | 15 years | 5 years 7 months 6 days | 14 years 3 months 18 days
Combination - Term Extension and Interest Rate Reduction [Member] | Real Estate Mortgage [Member] |  |  |  |
Financial Effect of Modifications Made to Borrowers Experiencing Financial Difficulty [Abstract] |  |  |  |
Weighted-average contractual interest rate |  | 8.50% |  |
Weighted-average contractual interest rate, pre-modification | 5.40% |  | 5.30% | 5.60%
Weighted-average contractual interest rate, post-modification | 3.00% |  | 3.60% | 4.20%
Weighted-average term increased | 6 years 6 months | 20 years | 5 years 6 months | 4 years 3 months 18 days
Combination - Term Extension and Interest Rate Reduction [Member] | Home Equity Lines [Member] |  |  |  |
Financial Effect of Modifications Made to Borrowers Experiencing Financial Difficulty [Abstract] |  |  |  |
Weighted-average contractual interest rate, pre-modification | 8.70% | 5.40% | 8.30% | 9.30%
Weighted-average contractual interest rate, post-modification | 7.50% | 3.00% | 7.50% | 8.60%
Weighted-average term increased | 9 years | 1 year 4 months 24 days | 7 years 6 months | 13 years 1 month 6 days

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