FAIR VALUE MEASUREMENTS - Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($)
Schedule of Equity Method Investments [Line Items]
Fair Value	$ 68,400
Notes payable of consolidated funds	218,100
Residential Mortgage Loans, Held-for-Sale, at Lower Cost or Fair Value
Schedule of Equity Method Investments [Line Items]
Asset fair value adjustment	200
Real Estate Owned
Schedule of Equity Method Investments [Line Items]
Asset fair value adjustment	300
Fair Value, Measurements, Nonrecurring
Schedule of Equity Method Investments [Line Items]
Assets, fair value	95,400
Fair Value, Measurements, Nonrecurring | Residential Mortgage Loans, Held-for-Sale
Schedule of Equity Method Investments [Line Items]
Assets, fair value	74,400
Fair Value, Measurements, Nonrecurring | Real Estate Acquired in Satisfaction of Debt
Schedule of Equity Method Investments [Line Items]
Assets, fair value	21,000
Recurring Basis | Fair Value
Schedule of Equity Method Investments [Line Items]
Assets, fair value	36,543,821
Notes payable of consolidated funds	218,123
Recurring Basis | Level 3 | Fair Value
Schedule of Equity Method Investments [Line Items]
Assets, fair value	14,999,317
Notes payable of consolidated funds	$ 218,123
Weighted Average
Schedule of Equity Method Investments [Line Items]
Broker price discount	20.00%
Minimum
Schedule of Equity Method Investments [Line Items]
Broker price discount	10.00%
Maximum
Schedule of Equity Method Investments [Line Items]
Broker price discount	25.00%
Excess MSRs | Weighted Average
Schedule of Equity Method Investments [Line Items]
Discount rate	8.80%
Excess MSRs | Minimum
Schedule of Equity Method Investments [Line Items]
Discount rate	8.50%
Excess MSRs | Maximum
Schedule of Equity Method Investments [Line Items]
Discount rate	9.00%
MSRs | Weighted Average
Schedule of Equity Method Investments [Line Items]
Discount rate	8.50%
MSRs | Minimum
Schedule of Equity Method Investments [Line Items]
Discount rate	7.90%
MSRs | Maximum
Schedule of Equity Method Investments [Line Items]
Discount rate	10.80%
Secured Overnight Financing Rate | MSRs and MSR Financing Receivables
Schedule of Equity Method Investments [Line Items]
Variable interest rate spread	4.10%