FAIR VALUE MEASUREMENTS - Financial Assets Measured at Fair Value on a Recurring Basis using Level 3 Inputs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Non-Agency
Gain (loss) included in net income
Gain (loss) on settlement of investments, net	$ 0	$ (100)	$ (200)	$ (1,600)
Excess MSRs in Equity Method Investees
Purchases, sales and repayments
Rithm Capital’s percentage ownership	50.00%		50.00%		50.00%
Recurring Basis | Level 3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning			$ 13,455,778
Transfers
Transfers from Level 3			(295,315)
Transfers to Level 3			20,421
Gain (loss) included in net income
Credit losses on securities			371
Included in servicing revenue			(99,338)
Excess MSRs			(11,862)
Change in fair value of excess MSRs, equity method investees			0
Servicer advance investments			20,273
Residential mortgage loans			(9,548)
Consumer loans			(14,024)
Gain (loss) on settlement of investments, net			284
Other income (loss), net			37,202
Gains (losses) included in OCI			685
Interest income			79,814
Purchases, sales and repayments
Purchases, net			2,214,507
Proceeds from sales			(924,328)
Proceeds from repayments			(2,536,633)
Originations and other			2,132,063
Balance, ending	$ 14,070,350		14,070,350
Recurring Basis | Level 3 | Servicer Advance Investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning			398,820
Transfers
Transfers from Level 3			0
Transfers to Level 3			0
Gain (loss) included in net income
Credit losses on securities			0
Included in servicing revenue			0
Excess MSRs			0
Change in fair value of excess MSRs, equity method investees			0
Servicer advance investments			20,273
Residential mortgage loans			0
Consumer loans			0
Gain (loss) on settlement of investments, net			0
Other income (loss), net			0
Gains (losses) included in OCI			0
Interest income			16,257
Purchases, sales and repayments
Purchases, net			644,594
Proceeds from sales			0
Proceeds from repayments			(692,275)
Originations and other			0
Balance, ending	387,669		387,669
Recurring Basis | Level 3 | Excess MSRs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning			321,803
Transfers
Transfers from Level 3			0
Transfers to Level 3			0
Gain (loss) included in net income
Credit losses on securities			0
Included in servicing revenue			0
Excess MSRs			(11,862)
Change in fair value of excess MSRs, equity method investees			0
Servicer advance investments			0
Residential mortgage loans			0
Consumer loans			0
Gain (loss) on settlement of investments, net			284
Other income (loss), net			(134)
Gains (losses) included in OCI			0
Interest income			16,733
Purchases, sales and repayments
Purchases, net			0
Proceeds from sales			(900)
Proceeds from repayments			(42,948)
Originations and other			0
Balance, ending	282,976		282,976
Recurring Basis | Level 3 | MSRs and MSR Financing Receivables
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning			8,889,403
Transfers
Transfers from Level 3			0
Transfers to Level 3			0
Gain (loss) included in net income
Credit losses on securities			0
Included in servicing revenue			(99,338)
Excess MSRs			0
Change in fair value of excess MSRs, equity method investees			0
Servicer advance investments			0
Residential mortgage loans			0
Consumer loans			0
Gain (loss) on settlement of investments, net			0
Other income (loss), net			0
Gains (losses) included in OCI			0
Interest income			0
Purchases, sales and repayments
Purchases, net			0
Proceeds from sales			(704,657)
Proceeds from repayments			0
Originations and other			609,460
Balance, ending	8,694,868		8,694,868
Recurring Basis | Level 3 | Non-Agency
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning			950,860
Transfers
Transfers from Level 3			0
Transfers to Level 3			0
Gain (loss) included in net income
Credit losses on securities			371
Included in servicing revenue			0
Excess MSRs			0
Change in fair value of excess MSRs, equity method investees			0
Servicer advance investments			0
Residential mortgage loans			0
Consumer loans			0
Gain (loss) on settlement of investments, net
Other income (loss), net			(3,028)
Gains (losses) included in OCI			685
Interest income			21,121
Purchases, sales and repayments
Purchases, net			32,600
Proceeds from sales			0
Proceeds from repayments			(101,381)
Originations and other			0
Balance, ending	901,228		901,228
Recurring Basis | Level 3 | Derivatives
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning			8,786
Transfers
Transfers from Level 3			0
Transfers to Level 3			0
Gain (loss) included in net income
Credit losses on securities			0
Included in servicing revenue			0
Excess MSRs			0
Change in fair value of excess MSRs, equity method investees			0
Servicer advance investments			0
Residential mortgage loans			0
Consumer loans			0
Gain (loss) on settlement of investments, net			0
Other income (loss), net			(2,288)
Gains (losses) included in OCI			0
Interest income			0
Purchases, sales and repayments
Purchases, net			0
Proceeds from sales			0
Proceeds from repayments			0
Originations and other			0
Balance, ending	6,498		6,498
Recurring Basis | Level 3 | Residential mortgage loans
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning			713,896
Transfers
Transfers from Level 3			(41,430)
Transfers to Level 3			20,421
Gain (loss) included in net income
Credit losses on securities			0
Included in servicing revenue			0
Excess MSRs			0
Change in fair value of excess MSRs, equity method investees			0
Servicer advance investments			0
Residential mortgage loans			(9,548)
Consumer loans			0
Gain (loss) on settlement of investments, net			0
Other income (loss), net			42,421
Gains (losses) included in OCI			0
Interest income			0
Purchases, sales and repayments
Purchases, net			38,335
Proceeds from sales			(239,446)
Proceeds from repayments			(69,718)
Originations and other			55,379
Balance, ending	510,310		510,310
Recurring Basis | Level 3 | Consumer Loans
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning			363,756
Transfers
Transfers from Level 3			0
Transfers to Level 3			0
Gain (loss) included in net income
Credit losses on securities			0
Included in servicing revenue			0
Excess MSRs			0
Change in fair value of excess MSRs, equity method investees			0
Servicer advance investments			0
Residential mortgage loans			0
Consumer loans			(14,024)
Gain (loss) on settlement of investments, net			0
Other income (loss), net			0
Gains (losses) included in OCI			0
Interest income			21,281
Purchases, sales and repayments
Purchases, net			1,317,347
Proceeds from sales			20,675
Proceeds from repayments			(272,955)
Originations and other			0
Balance, ending	1,436,080		1,436,080
Recurring Basis | Level 3 | Notes and Loans Receivable
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning			94,401
Transfers
Transfers from Level 3			0
Transfers to Level 3			0
Gain (loss) included in net income
Credit losses on securities			0
Included in servicing revenue			0
Excess MSRs			0
Change in fair value of excess MSRs, equity method investees			0
Servicer advance investments			0
Residential mortgage loans			0
Consumer loans			0
Gain (loss) on settlement of investments, net			0
Other income (loss), net			231
Gains (losses) included in OCI			0
Interest income			4,422
Purchases, sales and repayments
Purchases, net			35,000
Proceeds from sales			0
Proceeds from repayments			(70,695)
Originations and other			0
Balance, ending	63,359		63,359
Recurring Basis | Level 3 | Mortgage Loans Receivable
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning			1,714,053
Transfers
Transfers from Level 3			(253,885)
Transfers to Level 3			0
Gain (loss) included in net income
Credit losses on securities			0
Included in servicing revenue			0
Excess MSRs			0
Change in fair value of excess MSRs, equity method investees			0
Servicer advance investments			0
Residential mortgage loans			0
Consumer loans			0
Gain (loss) on settlement of investments, net			0
Other income (loss), net			0
Gains (losses) included in OCI			0
Interest income			0
Purchases, sales and repayments
Purchases, net			146,631
Proceeds from sales			0
Proceeds from repayments			(1,286,661)
Originations and other			1,467,224
Balance, ending	$ 1,787,362		$ 1,787,362