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Fair Value (Quantitative Information About Significant Unobservable Inputs for Assets Measured at Fair Value on a Nonrecurring Basis) (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Jun. 30, 2020
Dec. 31, 2019
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Impaired loans $ 19,412   $ 17,870
Mortgage servicing rights, fair value 2,567 $ 1,256 87
Other real estate owned 0   921
Non-recurring | Significant Unobservable Inputs (Level 3)      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Impaired loans 2,066   526
Mortgage servicing rights, fair value $ 2,567   87
Other real estate owned     $ 921
Minimum | Non-recurring | Significant Unobservable Inputs (Level 3)      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Impaired loans, measurement input 10.00%   10.00%
Other real estate owned, measurement input     18.00%
Maximum | Non-recurring | Significant Unobservable Inputs (Level 3)      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Impaired loans, measurement input 80.00%   50.00%
Other real estate owned, measurement input     36.00%
Prepayment speed | Non-recurring | Significant Unobservable Inputs (Level 3)      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Mortgage servicing rights, prepayment speed 9.40%   13.42%
Discount rate | Non-recurring | Significant Unobservable Inputs (Level 3)      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Mortgage servicing rights, prepayment speed 7.75%   8.50%