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Loans (Analysis of Nonaccrual Loans with no ACL) (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Financing Receivable, Nonaccrual [Line Items] |  |
Financing Receivable, Nonaccrual, No Allowance | $ 31,879 | $ 19,275
Commercial Real Estate [Member] |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Financing Receivable, Nonaccrual, No Allowance | 9,092 | 1,715
Commercial Business [Member] |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Financing Receivable, Nonaccrual, No Allowance | 11,713 | 15,762
Agriculture [Member] |  |
Financing Receivable, Nonaccrual [Line Items] |  |
Financing Receivable, Nonaccrual, No Allowance | $ 11,074 | $ 1,798

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