Mortgage Servicing Rights - Summary of the Weighted Average Discount Rate, Prepayment Speed and Cost to Service Assumptions Used to Determine the Fair Value of MSRs (Details) - USD ($) |
3 Months Ended | 12 Months Ended |
---|---|---|
Mar. 31, 2022 |
Dec. 31, 2021 |
|
Minimum | ||
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items] | ||
Discount rate | 9.30% | 9.30% |
Prepayment rate | 6.50% | 7.30% |
Cost to service (per loan) | $ 71.9 | $ 71.9 |
Maximum | ||
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items] | ||
Discount rate | 15.50% | 15.50% |
Prepayment rate | 30.00% | 29.50% |
Cost to service (per loan) | $ 472.5 | $ 247.6 |
Weighted Average | ||
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items] | ||
Discount rate | 9.90% | 9.90% |
Prepayment rate | 9.10% | 13.60% |
Cost to service (per loan) | $ 90.0 | $ 91.4 |