Loans, Financial Effect of Modifications Made to Borrowers Experiencing Financial Difficulty (Details)	3 Months Ended		9 Months Ended
	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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