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Servicing Assets - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Accounts Notes And Loans Receivable [Line Items]        
Changes in fair value of servicing assets $ (2,650) $ 1,122 $ (4,148) $ (2,653)
Loan Servicing Revenue [Member]        
Accounts Notes And Loans Receivable [Line Items]        
Fair value of servicing assets $ 3,300 $ 2,900 $ 9,300 $ 8,700