FAIR VALUE MEASUREMENTS (AS RESTATED) - Schedule of Information Regarding the Ranges and Weighted Averages of Inputs (Details)	3 Months Ended
	Mar. 31, 2024 $ / Loan
Prepayment Rate | MSRs and MSR Financing Receivables | Minimum
Directly Held
Servicing asset, measurement input	0.006
Prepayment Rate | MSRs and MSR Financing Receivables | Maximum
Directly Held
Servicing asset, measurement input	0.837
Prepayment Rate | MSRs and MSR Financing Receivables | Weighted Average
Directly Held
Servicing asset, measurement input	0.073
Prepayment Rate | Agency | MSRs and MSR Financing Receivables | Minimum
Directly Held
Servicing asset, measurement input	0.006
Prepayment Rate | Agency | MSRs and MSR Financing Receivables | Maximum
Directly Held
Servicing asset, measurement input	0.837
Prepayment Rate | Agency | MSRs and MSR Financing Receivables | Weighted Average
Directly Held
Servicing asset, measurement input	0.064
Prepayment Rate | Non-Agency | MSRs and MSR Financing Receivables | Minimum
Directly Held
Servicing asset, measurement input	0.008
Prepayment Rate | Non-Agency | MSRs and MSR Financing Receivables | Maximum
Directly Held
Servicing asset, measurement input	0.835
Prepayment Rate | Non-Agency | MSRs and MSR Financing Receivables | Weighted Average
Directly Held
Servicing asset, measurement input	0.077
Prepayment Rate | Ginnie Mae | MSRs and MSR Financing Receivables | Minimum
Directly Held
Servicing asset, measurement input	0.045
Prepayment Rate | Ginnie Mae | MSRs and MSR Financing Receivables | Maximum
Directly Held
Servicing asset, measurement input	0.819
Prepayment Rate | Ginnie Mae | MSRs and MSR Financing Receivables | Weighted Average
Directly Held
Servicing asset, measurement input	0.091
Prepayment Rate | Directly Held | Excess MSRs | Minimum
Directly Held
Servicing asset, measurement input	0.025
Prepayment Rate | Directly Held | Excess MSRs | Maximum
Directly Held
Servicing asset, measurement input	0.120
Prepayment Rate | Directly Held | Excess MSRs | Weighted Average
Directly Held
Servicing asset, measurement input	0.066
Prepayment Rate | Held through Equity Method Investees | Excess MSRs | Minimum
Directly Held
Servicing asset, measurement input	0.074
Prepayment Rate | Held through Equity Method Investees | Excess MSRs | Maximum
Directly Held
Servicing asset, measurement input	0.101
Prepayment Rate | Held through Equity Method Investees | Excess MSRs | Weighted Average
Directly Held
Servicing asset, measurement input	0.086
Delinquency | MSRs and MSR Financing Receivables | Minimum
Directly Held
Servicing asset, measurement input	0.001
Delinquency | MSRs and MSR Financing Receivables | Maximum
Directly Held
Servicing asset, measurement input	1.000
Delinquency | MSRs and MSR Financing Receivables | Weighted Average
Directly Held
Servicing asset, measurement input	0.055
Delinquency | Agency | MSRs and MSR Financing Receivables | Minimum
Directly Held
Servicing asset, measurement input	0.001
Delinquency | Agency | MSRs and MSR Financing Receivables | Maximum
Directly Held
Servicing asset, measurement input	1.000
Delinquency | Agency | MSRs and MSR Financing Receivables | Weighted Average
Directly Held
Servicing asset, measurement input	0.017
Delinquency | Non-Agency | MSRs and MSR Financing Receivables | Minimum
Directly Held
Servicing asset, measurement input	0.008
Delinquency | Non-Agency | MSRs and MSR Financing Receivables | Maximum
Directly Held
Servicing asset, measurement input	0.800
Delinquency | Non-Agency | MSRs and MSR Financing Receivables | Weighted Average
Directly Held
Servicing asset, measurement input	0.266
Delinquency | Ginnie Mae | MSRs and MSR Financing Receivables | Minimum
Directly Held
Servicing asset, measurement input	0.001
Delinquency | Ginnie Mae | MSRs and MSR Financing Receivables | Maximum
Directly Held
Servicing asset, measurement input	0.714
Delinquency | Ginnie Mae | MSRs and MSR Financing Receivables | Weighted Average
Directly Held
Servicing asset, measurement input	0.081
Delinquency | Directly Held | Excess MSRs | Minimum
Directly Held
Servicing asset, measurement input	0.002
Delinquency | Directly Held | Excess MSRs | Maximum
Directly Held
Servicing asset, measurement input	0.150
Delinquency | Directly Held | Excess MSRs | Weighted Average
Directly Held
Servicing asset, measurement input	0.062
Delinquency | Held through Equity Method Investees | Excess MSRs | Minimum
Directly Held
Servicing asset, measurement input	0.018
Delinquency | Held through Equity Method Investees | Excess MSRs | Maximum
Directly Held
Servicing asset, measurement input	0.050
Delinquency | Held through Equity Method Investees | Excess MSRs | Weighted Average
Directly Held
Servicing asset, measurement input	0.032
Recapture Rate | Directly Held | Excess MSRs | Minimum
Directly Held
Servicing asset, measurement input	0.000
Recapture Rate | Directly Held | Excess MSRs | Maximum
Directly Held
Servicing asset, measurement input	0.913
Recapture Rate | Directly Held | Excess MSRs | Weighted Average
Directly Held
Servicing asset, measurement input	0.554
Recapture Rate | Held through Equity Method Investees | Excess MSRs | Minimum
Directly Held
Servicing asset, measurement input	0.454
Recapture Rate | Held through Equity Method Investees | Excess MSRs | Maximum
Directly Held
Servicing asset, measurement input	0.641
Recapture Rate | Held through Equity Method Investees | Excess MSRs | Weighted Average
Directly Held
Servicing asset, measurement input	0.592
Mortgage Servicing Amount | MSRs and MSR Financing Receivables | Minimum
Directly Held
Servicing asset, measurement input	0.0001
Mortgage Servicing Amount | MSRs and MSR Financing Receivables | Maximum
Directly Held
Servicing asset, measurement input	0.0277
Mortgage Servicing Amount | MSRs and MSR Financing Receivables | Weighted Average
Directly Held
Servicing asset, measurement input	0.0033
Mortgage Servicing Amount | Agency | MSRs and MSR Financing Receivables | Minimum
Directly Held
Servicing asset, measurement input	0.0012
Mortgage Servicing Amount | Agency | MSRs and MSR Financing Receivables | Maximum
Directly Held
Servicing asset, measurement input	0.0136
Mortgage Servicing Amount | Agency | MSRs and MSR Financing Receivables | Weighted Average
Directly Held
Servicing asset, measurement input	0.0027
Mortgage Servicing Amount | Non-Agency | MSRs and MSR Financing Receivables | Minimum
Directly Held
Servicing asset, measurement input	0.0001
Mortgage Servicing Amount | Non-Agency | MSRs and MSR Financing Receivables | Maximum
Directly Held
Servicing asset, measurement input	0.0277
Mortgage Servicing Amount | Non-Agency | MSRs and MSR Financing Receivables | Weighted Average
Directly Held
Servicing asset, measurement input	0.0046
Mortgage Servicing Amount | Ginnie Mae | MSRs and MSR Financing Receivables | Minimum
Directly Held
Servicing asset, measurement input	0.0019
Mortgage Servicing Amount | Ginnie Mae | MSRs and MSR Financing Receivables | Maximum
Directly Held
Servicing asset, measurement input	0.0119
Mortgage Servicing Amount | Ginnie Mae | MSRs and MSR Financing Receivables | Weighted Average
Directly Held
Servicing asset, measurement input	0.0044
Mortgage Servicing Amount | Directly Held | Excess MSRs | Minimum
Directly Held
Servicing asset, measurement input	0.0007
Mortgage Servicing Amount | Directly Held | Excess MSRs | Maximum
Directly Held
Servicing asset, measurement input	0.0032
Mortgage Servicing Amount | Directly Held | Excess MSRs | Weighted Average
Directly Held
Servicing asset, measurement input	0.0020
Mortgage Servicing Amount | Held through Equity Method Investees | Excess MSRs | Minimum
Directly Held
Servicing asset, measurement input	0.0016
Mortgage Servicing Amount | Held through Equity Method Investees | Excess MSRs | Maximum
Directly Held
Servicing asset, measurement input	0.0025
Mortgage Servicing Amount | Held through Equity Method Investees | Excess MSRs | Weighted Average
Directly Held
Servicing asset, measurement input	0.0021
Collateral Weighted Average Maturity (Years) | MSRs and MSR Financing Receivables | Minimum
Directly Held
Collateral Weighted Average Maturity (Years)	0 years
Collateral Weighted Average Maturity (Years) | MSRs and MSR Financing Receivables | Maximum
Directly Held
Collateral Weighted Average Maturity (Years)	40 years
Collateral Weighted Average Maturity (Years) | MSRs and MSR Financing Receivables | Weighted Average
Directly Held
Collateral Weighted Average Maturity (Years)	24 years
Collateral Weighted Average Maturity (Years) | Agency | MSRs and MSR Financing Receivables | Minimum
Directly Held
Collateral Weighted Average Maturity (Years)	0 years
Collateral Weighted Average Maturity (Years) | Agency | MSRs and MSR Financing Receivables | Maximum
Directly Held
Collateral Weighted Average Maturity (Years)	40 years
Collateral Weighted Average Maturity (Years) | Agency | MSRs and MSR Financing Receivables | Weighted Average
Directly Held
Collateral Weighted Average Maturity (Years)	22 years
Collateral Weighted Average Maturity (Years) | Non-Agency | MSRs and MSR Financing Receivables | Minimum
Directly Held
Collateral Weighted Average Maturity (Years)	0 years
Collateral Weighted Average Maturity (Years) | Non-Agency | MSRs and MSR Financing Receivables | Maximum
Directly Held
Collateral Weighted Average Maturity (Years)	40 years
Collateral Weighted Average Maturity (Years) | Non-Agency | MSRs and MSR Financing Receivables | Weighted Average
Directly Held
Collateral Weighted Average Maturity (Years)	20 years
Collateral Weighted Average Maturity (Years) | Ginnie Mae | MSRs and MSR Financing Receivables | Minimum
Directly Held
Collateral Weighted Average Maturity (Years)	0 years
Collateral Weighted Average Maturity (Years) | Ginnie Mae | MSRs and MSR Financing Receivables | Maximum
Directly Held
Collateral Weighted Average Maturity (Years)	39 years
Collateral Weighted Average Maturity (Years) | Ginnie Mae | MSRs and MSR Financing Receivables | Weighted Average
Directly Held
Collateral Weighted Average Maturity (Years)	27 years
Collateral Weighted Average Maturity (Years) | Directly Held | Excess MSRs | Minimum
Directly Held
Collateral Weighted Average Maturity (Years)	11 years
Collateral Weighted Average Maturity (Years) | Directly Held | Excess MSRs | Maximum
Directly Held
Collateral Weighted Average Maturity (Years)	26 years
Collateral Weighted Average Maturity (Years) | Directly Held | Excess MSRs | Weighted Average
Directly Held
Collateral Weighted Average Maturity (Years)	20 years
Collateral Weighted Average Maturity (Years) | Held through Equity Method Investees | Excess MSRs | Minimum
Directly Held
Collateral Weighted Average Maturity (Years)	14 years
Collateral Weighted Average Maturity (Years) | Held through Equity Method Investees | Excess MSRs | Maximum
Directly Held
Collateral Weighted Average Maturity (Years)	21 years
Collateral Weighted Average Maturity (Years) | Held through Equity Method Investees | Excess MSRs | Weighted Average
Directly Held
Collateral Weighted Average Maturity (Years)	18 years
Measurement Input, Servicing Cost | Agency | MSRs and MSR Financing Receivables | Minimum
Directly Held
Servicing asset, measurement input	6.91
Measurement Input, Servicing Cost | Agency | MSRs and MSR Financing Receivables | Maximum
Directly Held
Servicing asset, measurement input	7.09
Measurement Input, Servicing Cost | Agency | MSRs and MSR Financing Receivables | Weighted Average
Directly Held
Servicing asset, measurement input	6.95
Measurement Input, Servicing Cost | Non-Agency | MSRs and MSR Financing Receivables | Minimum
Directly Held
Servicing asset, measurement input	7.54
Measurement Input, Servicing Cost | Non-Agency | MSRs and MSR Financing Receivables | Maximum
Directly Held
Servicing asset, measurement input	9.55
Measurement Input, Servicing Cost | Non-Agency | MSRs and MSR Financing Receivables | Weighted Average
Directly Held
Servicing asset, measurement input	9.17
Measurement Input, Servicing Cost | Ginnie Mae | MSRs and MSR Financing Receivables | Weighted Average
Directly Held
Servicing asset, measurement input	8.37