Fair Value - Quantitative Information of Fair Value Measurements (Details) - Significant Unobservable  Inputs (Level 3) - Collateral Dependent Loans $ in Thousands	Sep. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)
Commercial and Industrial Loans | Adjustment for physical condition of comparable properties sold | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	0.04	0.30
Commercial and Industrial Loans | Adjustment for physical condition of comparable properties sold | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	1	0.88
Commercial and Industrial Loans | Adjustment for physical condition of comparable properties sold | Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	0.65	0.53
Commercial Real Estate Loans | Adjustment for physical condition of comparable properties sold | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	0.10	0.30
Commercial Real Estate Loans | Adjustment for physical condition of comparable properties sold | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	0.85	0.68
Commercial Real Estate Loans | Adjustment for physical condition of comparable properties sold | Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	0.73	0.46
Agricultural Loans | Adjustment for physical condition of comparable properties sold | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	0.28	0.30
Agricultural Loans | Adjustment for physical condition of comparable properties sold | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	1	1
Agricultural Loans | Adjustment for physical condition of comparable properties sold | Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	0.41	0.57
Consumer Loans | Adjustment for physical condition of comparable properties sold | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	0.20	0.20
Consumer Loans | Adjustment for physical condition of comparable properties sold | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	0.20	0.20
Consumer Loans | Adjustment for physical condition of comparable properties sold | Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	0.20	0.20
Home Equity Loans | Adjustment for physical condition of comparable properties sold | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	0.20	0.20
Home Equity Loans | Adjustment for physical condition of comparable properties sold | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	0.20	0.20
Home Equity Loans | Adjustment for physical condition of comparable properties sold | Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	0.20	0.20
Residential Mortgage Loans | Adjustment for physical condition of comparable properties sold | Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	0.20	0.20
Residential Mortgage Loans | Adjustment for physical condition of comparable properties sold | Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	0.20	0.20
Residential Mortgage Loans | Adjustment for physical condition of comparable properties sold | Weighted Average
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)	0.20	0.20
Nonrecurring | Commercial and Industrial Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 17,038	$ 3,695
Nonrecurring | Commercial Real Estate Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	25,278	1,402
Nonrecurring | Agricultural Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	2,657	1,910
Nonrecurring | Consumer Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	3	10
Nonrecurring | Home Equity Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	329	328
Nonrecurring | Residential Mortgage Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 1,071	$ 303