Annual report pursuant to Section 13 and 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)

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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
Dec. 31, 2021
Dec. 31, 2020
Transfers and Servicing [Abstract]    
Mortgage servicing rights, Prepayment Speeds 10% Adverse Change $ (35,704) $ (36,117)
Mortgage servicing rights, Prepayment Speeds 20% Adverse Change (69,207) (66,419)
Mortgage servicing rights, Discount Rates 10% Adverse Change (23,135) (18,638)
Mortgage servicing rights, Discount Rates 20% Adverse Change (45,139) (32,312)
Mortgage servicing rights, Cost to Service (per loan) 10% Adverse Change (7,875) (10,334)
Mortgage servicing rights, Cost to Service (per loan) 20% Adverse Change $ (16,288) $ (16,700)