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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 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Fair Value Disclosures [Abstract]        
Interest income $ 139 $ 100 $ 309 $ 246
Change in fair value (115) (185) 87 (20)
Total change in fair value $ 24 $ (85) $ 396 $ 226