Annual report pursuant to Section 13 and 15(d)

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)

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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) - $ / loan
12 Months Ended
Dec. 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 9.60% 9.30%
Prepayment rate 6.60% 7.30%
Cost to service (in USD per loan) 66.7 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 15.70% 15.50%
Prepayment rate 28.60% 29.50%
Cost to service (in USD per loan) 330.4 247.6
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 10.60% 9.90%
Prepayment rate 7.50% 13.60%
Cost to service (in USD per loan) 92.0 91.4