RELATED PARTY TRANSACTIONS (Details) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2025 USD ($)	Mar. 31, 2025 USD ($) $ / shares shares	Jun. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) shares	Sep. 30, 2024 shares	Mar. 31, 2024 USD ($)	Jul. 31, 2023 USD ($)	Mar. 31, 2022 USD ($)
Related Party Transaction [Line Items]
Alternative investment	$ 42,200			$ 42,200
Outstanding face amount		$ 35,000
Notes receivable		$ 17,500
Total Residential Mortgage Loans, HFS
Related Party Transaction [Line Items]
Outstanding face amount	65,743			$ 65,743
Great Ajax Corp.
Related Party Transaction [Line Items]
Percentage of common stock outstanding				7.30%
Great Ajax Corp. | Total Residential Mortgage Loans, HFS
Related Party Transaction [Line Items]
Outstanding face amount						$ 245,300
Rithm Acquisition Corp | IPO
Related Party Transaction [Line Items]
Issuance of common stock (in shares) | shares				660
Proceeds from issuance of initial public offering				$ 6,600
Number of warrants issued per unit				0.333
Great Ajax Corp.
Related Party Transaction [Line Items]
Warrant term					5 years
Shares issued for exercised warrants (in shares) | shares					3,300
Rithm Property Trust | Series C Fixed To Floating Rate Cumulative Redeemable Preferred Stock Member
Related Party Transaction [Line Items]
Percentage of cumulative redeemable preferred stock		0.192
Interest rate		9.875%
Rithm Property Trust | Series C Fixed To Floating Rate Cumulative Redeemable Preferred Stock Member | IPO
Related Party Transaction [Line Items]
Issuance of common stock (in shares) | shares		400
Proceeds form issuance of preferred stock		$ 10,000
Shares issued, price per share (in USD per share) | $ / shares		$ 25.00
Newrez Joint Ventures | Great Ajax Corp. | Total Residential Mortgage Loans, HFS
Related Party Transaction [Line Items]
Outstanding face amount			$ 562,100
Previously serviced amount			$ 2,900,000
Loan fee, performing and non performing loans (as a percent)			0.54%
Fair market value of the REO (as a percent)			1.00%
Purchase price of REO (as a percent)			1.00%
Carrying value of bonds retained by Rithm Capital	22,100			$ 22,100
Related Party | Great Ajax Corp.
Related Party Transaction [Line Items]
Number of shares issued (in shares) | shares				3,300
Net proceeds				$ 8,300
Loan Agreement | Related Party | Genesis
Related Party Transaction [Line Items]
Financing receivable							$ 86,400
Related Party Assets Under Management | Executive Managing Directors Employeesand Other Related Parties
Related Party Transaction [Line Items]
Assets under management	$ 1,600,000			$ 1,600,000
Percent of assets under management not charged management and incentive fees	67.00%			67.00%
Structured Alternative Investment Solution | Related Party
Related Party Transaction [Line Items]
Amount invested			$ 125,200
Interest acquired	$ 4,700	$ 74,600
Structured Alternative Investment Solution | Related Party | Sculptor
Related Party Transaction [Line Items]
Alternative investment								$ 350,000
Amount invested								$ 127,800