FAIR VALUE MEASUREMENTS - Schedule of Inputs Used in Valuing Residential Mortgage Loans (Details) - Fair Value, Measurements, Nonrecurring - Fair Value $ in Thousands	6 Months Ended
	Jun. 30, 2024 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 72,894
Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.074
Weighted Average Life (Years)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted average life (years)	5 years 1 month 6 days
Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.030
CDR
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.029
Loss Severity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.304
Performing loans
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 53,951
Performing loans | Minimum | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.066
Performing loans | Minimum | Weighted Average Life (Years)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted average life (years)	3 years 7 months 6 days
Performing loans | Minimum | Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.033
Performing loans | Minimum | CDR
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.018
Performing loans | Minimum | Loss Severity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.231
Performing loans | Maximum | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.086
Performing loans | Maximum | Weighted Average Life (Years)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted average life (years)	5 years 9 months 18 days
Performing loans | Maximum | Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.069
Performing loans | Maximum | CDR
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.162
Performing loans | Maximum | Loss Severity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.480
Performing loans | Weighted Average | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.080
Performing loans | Weighted Average | Weighted Average Life (Years)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted average life (years)	5 years 6 months
Performing loans | Weighted Average | Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.035
Performing loans | Weighted Average | CDR
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.028
Performing loans | Weighted Average | Loss Severity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.364
Non-performing loans
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 18,943
Non-performing loans | Minimum | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.093
Non-performing loans | Minimum | Weighted Average Life (Years)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted average life (years)	5 years 8 months 12 days
Non-performing loans | Minimum | Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.016
Non-performing loans | Minimum | CDR
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.014
Non-performing loans | Minimum | Loss Severity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.149
Non-performing loans | Maximum | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.094
Non-performing loans | Maximum | Weighted Average Life (Years)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted average life (years)	6 years 4 months 24 days
Non-performing loans | Maximum | Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.030
Non-performing loans | Maximum | CDR
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.086
Non-performing loans | Maximum | Loss Severity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.273
Non-performing loans | Weighted Average | Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.058
Non-performing loans | Weighted Average | Weighted Average Life (Years)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted average life (years)	3 years 8 months 12 days
Non-performing loans | Weighted Average | Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.014
Non-performing loans | Weighted Average | CDR
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.033
Non-performing loans | Weighted Average | Loss Severity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Financing receivable, measurement input	0.134