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Fair Value of Financial Instruments and Fair Value Measurements - Schedule of Gains and Losses from Changes in Fair Value of Loans Held for Sale (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Fair Value Disclosures [Abstract]    
Interest income $ 51 $ 48
Change in fair value 148 (99)
Total change in fair value $ 199 $ (51)