FAIR VALUE MEASUREMENTS (AS RESTATED) - Schedule of Inputs Used In Valuing Residential Mortgage Loans, Consumer Loans, Mortgage Loans Receivable, Derivatives, and Asset-Backed Securities Issued (Details) $ in Thousands	Mar. 31, 2024 USD ($) security
Residential mortgage loans HFI, at fair value
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans, held-for-investment, fair value	$ 365,398
Residential mortgage loans HFI, at fair value | Minimum | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for investment, measurement input	0.079
Residential mortgage loans HFI, at fair value | Minimum | Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for investment, measurement input	0.030
Residential mortgage loans HFI, at fair value | Minimum | Delinquency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for investment, measurement input	0.013
Residential mortgage loans HFI, at fair value | Minimum | Loss Severity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for investment, measurement input	0.232
Residential mortgage loans HFI, at fair value | Maximum | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for investment, measurement input	0.098
Residential mortgage loans HFI, at fair value | Maximum | Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for investment, measurement input	0.039
Residential mortgage loans HFI, at fair value | Maximum | Delinquency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for investment, measurement input	0.066
Residential mortgage loans HFI, at fair value | Maximum | Loss Severity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for investment, measurement input	0.554
Residential mortgage loans HFI, at fair value | Weighted Average | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for investment, measurement input	0.081
Residential mortgage loans HFI, at fair value | Weighted Average | Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for investment, measurement input	0.036
Residential mortgage loans HFI, at fair value | Weighted Average | Delinquency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for investment, measurement input	0.051
Residential mortgage loans HFI, at fair value | Weighted Average | Loss Severity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for investment, measurement input	0.434
Consumer Loans Held-for-Investment, At Fair Value
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Consumer loans	$ 1,103,799
Consumer Loans Held-for-Investment, At Fair Value | SpringCastle
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Consumer loans	267,948
Consumer Loans Held-for-Investment, At Fair Value | Marcus
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Consumer loans	$ 835,851
Consumer Loans Held-for-Investment, At Fair Value | Minimum | Discount Rate | SpringCastle
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Consumer loans, held-for-investment, measurement input	0.084
Consumer Loans Held-for-Investment, At Fair Value | Minimum | Prepayment Rate | SpringCastle
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Consumer loans, held-for-investment, measurement input	0.094
Consumer Loans Held-for-Investment, At Fair Value | Minimum | Delinquency | SpringCastle
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Consumer loans, held-for-investment, measurement input	0.017
Consumer Loans Held-for-Investment, At Fair Value | Minimum | Loss Severity | SpringCastle
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Consumer loans, held-for-investment, measurement input	0.857
Consumer Loans Held-for-Investment, At Fair Value | Maximum | Discount Rate | SpringCastle
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Consumer loans, held-for-investment, measurement input	0.094
Consumer Loans Held-for-Investment, At Fair Value | Maximum | Prepayment Rate | SpringCastle
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Consumer loans, held-for-investment, measurement input	0.357
Consumer Loans Held-for-Investment, At Fair Value | Maximum | Delinquency | SpringCastle
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Consumer loans, held-for-investment, measurement input	0.073
Consumer Loans Held-for-Investment, At Fair Value | Maximum | Loss Severity | SpringCastle
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Consumer loans, held-for-investment, measurement input	1.000
Consumer Loans Held-for-Investment, At Fair Value | Weighted Average | Discount Rate | SpringCastle
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Consumer loans, held-for-investment, measurement input	0.086
Consumer Loans Held-for-Investment, At Fair Value | Weighted Average | Discount Rate | Marcus
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Consumer loans, held-for-investment, measurement input	0.078
Consumer Loans Held-for-Investment, At Fair Value | Weighted Average | Prepayment Rate | SpringCastle
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Consumer loans, held-for-investment, measurement input	0.155
Consumer Loans Held-for-Investment, At Fair Value | Weighted Average | Prepayment Rate | Marcus
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Consumer loans, held-for-investment, measurement input	0.198
Consumer Loans Held-for-Investment, At Fair Value | Weighted Average | Delinquency | SpringCastle
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Consumer loans, held-for-investment, measurement input	0.050
Consumer Loans Held-for-Investment, At Fair Value | Weighted Average | Delinquency | Marcus
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Consumer loans, held-for-investment, measurement input	0.113
Consumer Loans Held-for-Investment, At Fair Value | Weighted Average | Loss Severity | SpringCastle
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Consumer loans, held-for-investment, measurement input	0.936
Consumer Loans Held-for-Investment, At Fair Value | Weighted Average | Loss Severity | Marcus
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Consumer loans, held-for-investment, measurement input	0.860
Mortgage Loans Held-for-Investment, at Fair Value
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage loans, held for investment, fair value	$ 2,042,913
IRLCs
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative, fair value	$ 31,228
IRLCs | Minimum | Loan Funding Probability
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative, measurement input	0.004
IRLCs | Minimum | Fair Value of Initial Servicing Rights (Bps)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative, measurement input	0.00044
IRLCs | Maximum | Loan Funding Probability
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative, measurement input	1.000
IRLCs | Maximum | Fair Value of Initial Servicing Rights (Bps)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative, measurement input	0.03450
IRLCs | Weighted Average | Loan Funding Probability
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative, measurement input	0.836
IRLCs | Weighted Average | Fair Value of Initial Servicing Rights (Bps)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative, measurement input	0.02397
Asset-Backed Securities Issued
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities, fair value	$ 221,922
Asset-Backed Securities Issued | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities, measurement input	0.058
Asset-Backed Securities Issued | Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities, measurement input	0.155
Asset-Backed Securities Issued | Delinquency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities, measurement input	0.050
Asset-Backed Securities Issued | Loss Severity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Securities, measurement input	0.936
Acquired loans | Mortgage Loans Held-for-Investment, at Fair Value
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage loans, held for investment, fair value	$ 73,934
Acquired loans | Mortgage Loans Held-for-Investment, at Fair Value | Minimum | Delinquency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage loans, held-for-investment, measurement input	0.018
Acquired loans | Mortgage Loans Held-for-Investment, at Fair Value | Maximum | Delinquency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage loans, held-for-investment, measurement input	0.025
Acquired loans | Mortgage Loans Held-for-Investment, at Fair Value | Weighted Average | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage loans, held-for-investment, measurement input	0.107
Acquired loans | Mortgage Loans Held-for-Investment, at Fair Value | Weighted Average | Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage loans, held-for-investment, measurement input	0
Acquired loans | Mortgage Loans Held-for-Investment, at Fair Value | Weighted Average | Delinquency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage loans, held-for-investment, measurement input	0.021
Acquired loans | Mortgage Loans Held-for-Investment, at Fair Value | Weighted Average | Loss Severity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage loans, held-for-investment, measurement input	0.250
Originated loans | Residential mortgage loans HFS, at fair value | Minimum | Dealer price quotes and historical sale transactions
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale, measurement input | security	0.509
Originated loans | Residential mortgage loans HFS, at fair value | Maximum | Dealer price quotes and historical sale transactions
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale, measurement input | security	1.000
Originated loans | Residential mortgage loans HFS, at fair value | Weighted Average | Dealer price quotes and historical sale transactions
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale, measurement input | security	0.858
Originated loans | Mortgage Loans Held-for-Investment, at Fair Value
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage loans, held for investment, fair value	$ 1,968,979
Originated loans | Mortgage Loans Held-for-Investment, at Fair Value | Weighted Average | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Mortgage loans, held-for-investment, measurement input	0.096
Performing loans | Residential mortgage loans HFS, at fair value
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, fair value	$ 247,777
Performing loans | Acquired loans | Residential mortgage loans HFS, at fair value
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, fair value	$ 215,160
Performing loans | Acquired loans | Residential mortgage loans HFS, at fair value | Minimum | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale, measurement input	0.059
Performing loans | Acquired loans | Residential mortgage loans HFS, at fair value | Minimum | Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale, measurement input	0.023
Performing loans | Acquired loans | Residential mortgage loans HFS, at fair value | Minimum | Delinquency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale, measurement input	0.013
Performing loans | Acquired loans | Residential mortgage loans HFS, at fair value | Minimum | Loss Severity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale, measurement input	0.069
Performing loans | Acquired loans | Residential mortgage loans HFS, at fair value | Maximum | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale, measurement input	0.097
Performing loans | Acquired loans | Residential mortgage loans HFS, at fair value | Maximum | Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale, measurement input	0.091
Performing loans | Acquired loans | Residential mortgage loans HFS, at fair value | Maximum | Delinquency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale, measurement input	0.066
Performing loans | Acquired loans | Residential mortgage loans HFS, at fair value | Maximum | Loss Severity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale, measurement input	0.554
Performing loans | Acquired loans | Residential mortgage loans HFS, at fair value | Weighted Average | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale, measurement input	0.064
Performing loans | Acquired loans | Residential mortgage loans HFS, at fair value | Weighted Average | Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale, measurement input	0.073
Performing loans | Acquired loans | Residential mortgage loans HFS, at fair value | Weighted Average | Delinquency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale, measurement input	0.027
Performing loans | Acquired loans | Residential mortgage loans HFS, at fair value | Weighted Average | Loss Severity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale, measurement input	0.117
Performing loans | Originated loans | Residential mortgage loans HFS, at fair value
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, fair value	$ 32,617
Performing loans | Originated loans | Residential mortgage loans HFS, at fair value | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of loans	66.90%
Performing loans | Originated loans | Residential mortgage loans HFS, at fair value | Weighted Average | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale, measurement input	0.044
Performing loans | Originated loans | Residential mortgage loans HFS, at fair value | Weighted Average | Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale, measurement input	0.089
Performing loans | Originated loans | Residential mortgage loans HFS, at fair value | Weighted Average | Delinquency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale, measurement input	0.036
Performing loans | Originated loans | Residential mortgage loans HFS, at fair value | Weighted Average | Loss Severity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale, measurement input	0.207
Non-performing loans | Residential mortgage loans HFS, at fair value
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, fair value	$ 68,634
Non-performing loans | Acquired loans | Residential mortgage loans HFS, at fair value
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, fair value	$ 62,848
Non-performing loans | Acquired loans | Residential mortgage loans HFS, at fair value | Minimum | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale, measurement input	0.048
Non-performing loans | Acquired loans | Residential mortgage loans HFS, at fair value | Minimum | Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale, measurement input	0.020
Non-performing loans | Acquired loans | Residential mortgage loans HFS, at fair value | Minimum | Delinquency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale, measurement input | security	0.013
Non-performing loans | Acquired loans | Residential mortgage loans HFS, at fair value | Minimum | Loss Severity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale, measurement input	2.231
Non-performing loans | Acquired loans | Residential mortgage loans HFS, at fair value | Maximum | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale, measurement input	0.100
Non-performing loans | Acquired loans | Residential mortgage loans HFS, at fair value | Maximum | Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale, measurement input	0.076
Non-performing loans | Acquired loans | Residential mortgage loans HFS, at fair value | Maximum | Delinquency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale, measurement input | security	0.043
Non-performing loans | Acquired loans | Residential mortgage loans HFS, at fair value | Maximum | Loss Severity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale, measurement input	8.639
Non-performing loans | Acquired loans | Residential mortgage loans HFS, at fair value | Weighted Average | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale, measurement input	0.063
Non-performing loans | Acquired loans | Residential mortgage loans HFS, at fair value | Weighted Average | Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale, measurement input	0.038
Non-performing loans | Acquired loans | Residential mortgage loans HFS, at fair value | Weighted Average | Delinquency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale, measurement input | security	0.033
Non-performing loans | Acquired loans | Residential mortgage loans HFS, at fair value | Weighted Average | Loss Severity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale, measurement input	2.437
Non-performing loans | Originated loans | Residential mortgage loans HFS, at fair value
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held-for-sale, fair value	$ 5,786
Non-performing loans | Originated loans | Residential mortgage loans HFS, at fair value | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of loans	50.80%
Non-performing loans | Originated loans | Residential mortgage loans HFS, at fair value | Weighted Average | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale, measurement input	0.044
Non-performing loans | Originated loans | Residential mortgage loans HFS, at fair value | Weighted Average | Delinquency
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans held for sale, measurement input | security	0.036