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Fair Value Measurements Nonrecurring Basis by Level (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Fair value, measurements, nonrecurring [Member] | Fair value, inputs, level 3 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Collateral dependent impaired loans $ 0 $ 0