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Servicing Assets - Additional Information (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Accounts Notes And Loans Receivable [Line Items]      
Changes in fair value of servicing assets $ (6,639) $ (9,269) $ (5,941)
Loan Servicing Revenue [Member]      
Accounts Notes And Loans Receivable [Line Items]      
Fees and charges $ 10,695 $ 10,272 $ 9,599