REAL ESTATE AND OTHER SECURITIES - Summary of Real Estate Securities in an Unrealized Loss Position - Associated Intent to Sell (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Securities Rithm Capital intends to sell
Debt Securities, Available-for-sale [Line Items]
Fair Value	$ 0	$ 0
Amortized Cost Basis After Credit Impairment	0	0
Gross Unrealized Losses, Credit	0	0
Gross Unrealized Losses, Non-Credit	0	0
Securities Rithm Capital is more likely than not to be required to sell
Debt Securities, Available-for-sale [Line Items]
Fair Value	0	0
Amortized Cost Basis After Credit Impairment	0	0
Gross Unrealized Losses, Credit	0	0
Gross Unrealized Losses, Non-Credit	0	0
Credit impaired securities
Debt Securities, Available-for-sale [Line Items]
Fair Value	69,456	77,843
Amortized Cost Basis After Credit Impairment	69,833	78,101
Gross Unrealized Losses, Credit	(14,421)	(10,816)
Gross Unrealized Losses, Non-Credit	(376)	(258)
Non-credit impaired securities
Debt Securities, Available-for-sale [Line Items]
Fair Value	240,959	271,405
Amortized Cost Basis After Credit Impairment	273,505	304,831
Gross Unrealized Losses, Credit	0	0
Gross Unrealized Losses, Non-Credit	(32,547)	(33,426)
Total debt securities in an unrealized loss position
Debt Securities, Available-for-sale [Line Items]
Fair Value	310,415	349,248
Amortized Cost Basis After Credit Impairment	343,338	382,932
Gross Unrealized Losses, Credit	(14,421)	(10,816)
Gross Unrealized Losses, Non-Credit	$ (32,923)	$ (33,684)