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, 2023 |
Dec. 31, 2022 |
|
| 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 | 9.60% | 9.60% |
| Prepayment rate | 6.60% | 6.60% |
| Cost to service (per loan) | $ 72.1 | $ 66.7 |
| 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 | 15.70% | 15.70% |
| Prepayment rate | 29.10% | 28.60% |
| Cost to service (per loan) | $ 250.2 | $ 330.4 |
| 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 | 10.60% | 10.60% |
| Prepayment rate | 8.30% | 7.50% |
| Cost to service (per loan) | $ 90.9 | $ 92.0 |