Quarterly report pursuant to Section 13 or 15(d)

Mortgage Servicing Rights - Summary of Impact of Adverse Changes on Prepayment Speeds, Discount Rate and Cost to Service at Two Different Data Points (Details)

v3.21.2
Mortgage Servicing Rights - Summary of Impact of Adverse Changes on Prepayment Speeds, Discount Rate and Cost to Service at Two Different Data Points (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Transfers and Servicing [Abstract]    
Mortgage servicing rights, Prepayment Speeds, 10% Adverse Change $ (43,147) $ (36,117)
Mortgage servicing rights, Prepayment Speeds, 20% Adverse Change (75,581) (66,419)
Mortgage servicing rights, Discount Rates 10%, Adverse Change (29,430) (18,638)
Mortgage servicing rights, Discount Rates 20%, Adverse Change (49,293) (32,312)
Mortgage servicing rights, Cost to Service (per loan) 10%, Adverse Change (16,020) (10,334)
Mortgage servicing rights, Cost to Service (per loan) 20%, Adverse Change $ (23,967) $ (16,700)