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Loans (Analysis of Nonaccrual Loans with no ACL) (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Financing Receivable, Nonaccrual [Line Items]    
Financing Receivable, Nonaccrual, No Allowance $ 13,811 $ 20,911
Commercial Real Estate [Member]    
Financing Receivable, Nonaccrual [Line Items]    
Financing Receivable, Nonaccrual, No Allowance 942 6,393
Commercial Business [Member]    
Financing Receivable, Nonaccrual [Line Items]    
Financing Receivable, Nonaccrual, No Allowance 6,125 6,382
Agriculture [Member]    
Financing Receivable, Nonaccrual [Line Items]    
Financing Receivable, Nonaccrual, No Allowance $ 6,744 $ 8,136