Fair Value - Quantitative Information of Fair Value Measurements (Details) - Significant Unobservable  Inputs (Level 3) - Collateral Dependent Loans $ in Thousands	Mar. 31, 2026 USD ($)	Dec. 31, 2025 USD ($)
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)	0.20	0.07
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	1
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)	0.72	0.69
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)	0.20	0.20
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)	1	1
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)	0.85	0.89
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)	0.10	0.10
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)	0.58	0.53
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)	0.33	0.37
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	0
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	0
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	0
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	$ 13,385	$ 14,914
Nonrecurring | Commercial Real Estate Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	19,909	23,698
Nonrecurring | Agricultural Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	2,270	2,544
Nonrecurring | Consumer Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Nonrecurring | Home Equity Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	330	330
Nonrecurring | Residential Mortgage Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 241	$ 366