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Loans (Non-accrual and Loans Past Due over 89 Days Still Accruing) (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |  |
Non-Accrual With No Allowance For Credit Losses | [1] | $ 10,119 |
Non-Accrual |  | 21,507 | $ 13,802
Loans Past Due Over 89 Days Still Accruing |  | 0 | 190
Commercial and Industrial Loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Non-Accrual With No Allowance For Credit Losses | [1] | 4,571 |
Non-Accrual |  | 8,133 |
Loans Past Due Over 89 Days Still Accruing |  | 0 |
Commercial Real Estate Loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Non-Accrual With No Allowance For Credit Losses | [1] | 3,152 |
Non-Accrual |  | 10,188 | 3,433
Loans Past Due Over 89 Days Still Accruing |  | 0 | 0
Agricultural Loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Non-Accrual With No Allowance For Credit Losses | [1] | 1,291 |
Non-Accrual |  | 1,915 | 2,739
Loans Past Due Over 89 Days Still Accruing |  | 0 | 0
Leases |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Non-Accrual With No Allowance For Credit Losses | [1] | 0 |
Non-Accrual |  | 0 |
Loans Past Due Over 89 Days Still Accruing |  | 0 |
Home Equity Loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Non-Accrual With No Allowance For Credit Losses | [1] | 271 |
Non-Accrual |  | 271 | 79
Loans Past Due Over 89 Days Still Accruing |  | 0 | 0
Consumer Loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Non-Accrual With No Allowance For Credit Losses | [1] | 77 |
Non-Accrual |  | 84 | 115
Loans Past Due Over 89 Days Still Accruing |  | 0 | 0
Credit Cards |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Non-Accrual With No Allowance For Credit Losses | [1] | 86 |
Non-Accrual |  | 86 |
Loans Past Due Over 89 Days Still Accruing |  | 0 |
Residential Mortgage Loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Non-Accrual With No Allowance For Credit Losses | [1] | 671 |
Non-Accrual |  | 830 | 2,496
Loans Past Due Over 89 Days Still Accruing |  | $ 0 | $ 0
[1] | Includes non-accrual loans with no allowance for credit loss and are also included in Non-Accrual loans totaling $21,507

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