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Fair Value Measurements (Narrative) (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Nonrecurring [Member] | Level 3 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Allowance For Loan Loss Allocation on Collateral Dependent Impaired Loans $ 529 $ 871