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Fair Value Measurements - Schedule of Gains and Losses Resulting from Nonrecurring Fair Value Adjustments (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total loss from nonrecurring measurements $ 292 $ (594)
Loans measured for impairment    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total loss from nonrecurring measurements $ 292 $ (594)