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Servicing Assets (Sensitivity of Current Fair Value of Servicing Assets) (Details)
$ in Thousands
Sep. 30, 2020
USD ($)
Servicing Assets At Fair Value [Line Items]  
Servicing Asset $ 47,242
Constant Prepayment Rate - Decrease in fair value due to 10% adverse change (1,040)
Constant Prepayment Rate - Decrease in fair value due to 20% adverse change (2,042)
Discount Rate - Decrease in fair value due to 10% adverse change (1,889)
Discount Rate - Decrease in fair value due to 20% adverse change $ (3,648)