Fair Value (Quantitative Information of Fair Value Measurements) (Details) - Significant Unobservable  Inputs (Level 3) - Individually Analyzed Loans $ in Thousands	Sep. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)
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)	0.30	0.26
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)	0.55	0.61
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)	0.09	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)	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)	0.25	0.56
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)	0.30	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)	0.96	0.96
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)	0.90	0.65
Consumer Loans | Adjustment for physical condition of comparable properties sold
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Range (Weighted Average)		1
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
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
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	1
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)	0.23	0.09
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)	0.23	0.09
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)	0.23	0.09
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	0.43
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	0.97
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	0.67
Fair Value, Measurements, Nonrecurring | Commercial and Industrial Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 8,710	$ 4,985
Fair Value, Measurements, Nonrecurring | Commercial Real Estate Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	2,148	8,893
Fair Value, Measurements, Nonrecurring | Agricultural Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	79	551
Fair Value, Measurements, Nonrecurring | Consumer Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0	0
Fair Value, Measurements, Nonrecurring | Home Equity Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	345	369
Fair Value, Measurements, Nonrecurring | Residential Mortgage Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 0	$ 75