EXCESS MORTGAGE SERVICING RIGHTS - Summary of Financial Results of Excess MSR Joint Ventures (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022	Dec. 31, 2021
Schedule of Investments in Mortgage Servicing Rights [Line Items]
Excess MSR	$ 120,292		$ 120,292			$ 135,356
Other assets	151,469		151,469			132,809
Equity	7,267,963	$ 7,061,626	7,267,963	$ 7,061,626	$ 7,194,684	7,010,068	$ 7,062,998	$ 6,669,380
Rithm Capital’s investment	8,694,868		8,694,868			8,889,403
Interest income	5,397	4,437	11,079	10,514
Other income (loss)	(2,391)	(12,074)	(6,949)	(14,417)
Expenses	(8)	(8)	(24)	(24)
Net income (loss)	221,191	154,190	697,825	877,452
Excess MSR joint ventures
Schedule of Investments in Mortgage Servicing Rights [Line Items]
Rithm Capital’s investment	$ 65,212		$ 65,212			$ 72,437
Rithm Capital’s percentage ownership	50.00%		50.00%			50.00%
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Schedule of Investments in Mortgage Servicing Rights [Line Items]
Other assets	$ 10,818		$ 10,818			$ 10,204
Other liabilities	(687)		(687)			(687)
Equity	130,423		130,423			$ 144,873
Net income (loss)	$ 2,998	$ (7,645)	$ 4,106	$ (3,927)