CONSUMER LOANS - Schedule of Aggregate Unpaid Principal Balance and Aggregate Carrying Value (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Schedule of Equity Method Investments [Line Items]
Notes receivable	$ 449,507	$ 393,786
90+
Schedule of Equity Method Investments [Line Items]
UPB	8,038	0
Notes receivable	8,038	0
Carrying Value Over (Under) UPB	0	0
Past Due
Schedule of Equity Method Investments [Line Items]
UPB	547,948	518,856
Notes receivable	457,545	425,366
Carrying Value Over (Under) UPB	(90,403)	(93,490)
Consumer Portfolio Segment | Current | Total Rithm Capital Stockholders’ Equity | SpringCastle
Schedule of Equity Method Investments [Line Items]
UPB	168,873	203,923
Notes receivable	175,000	214,746
Carrying Value Over (Under) UPB	6,127	10,823
Consumer Portfolio Segment | Current | Total Rithm Capital Stockholders’ Equity | Marcus
Schedule of Equity Method Investments [Line Items]
UPB	198,115	438,712
Notes receivable	198,709	438,712
Carrying Value Over (Under) UPB	594	0
Consumer Portfolio Segment | Current | Total Rithm Capital Stockholders’ Equity | Upgrade
Schedule of Equity Method Investments [Line Items]
UPB	218,897	0
Notes receivable	206,699	0
Carrying Value Over (Under) UPB	(12,198)	0
Consumer Portfolio Segment | 90+ | Total Rithm Capital Stockholders’ Equity | SpringCastle
Schedule of Equity Method Investments [Line Items]
UPB	3,285	4,383
Notes receivable	3,365	4,562
Carrying Value Over (Under) UPB	80	179
Consumer Portfolio Segment | 90+ | Total Rithm Capital Stockholders’ Equity | Marcus
Schedule of Equity Method Investments [Line Items]
UPB	140,933	120,605
Notes receivable	14,298	7,545
Carrying Value Over (Under) UPB	(126,635)	(113,060)
Consumer Portfolio Segment | 90+ | Total Rithm Capital Stockholders’ Equity | Upgrade
Schedule of Equity Method Investments [Line Items]
UPB	81	0
Notes receivable	76	0
Carrying Value Over (Under) UPB	(5)	0
Consumer Portfolio Segment | Past Due | Total Rithm Capital Stockholders’ Equity
Schedule of Equity Method Investments [Line Items]
UPB	730,184	767,623
Notes receivable	598,147	665,565
Carrying Value Over (Under) UPB	(132,037)	(102,058)
Consumer Portfolio Segment | Past Due | Total Rithm Capital Stockholders’ Equity | SpringCastle
Schedule of Equity Method Investments [Line Items]
UPB	172,158	208,306
Notes receivable	178,365	219,308
Carrying Value Over (Under) UPB	6,207	11,002
Consumer Portfolio Segment | Past Due | Total Rithm Capital Stockholders’ Equity | Marcus
Schedule of Equity Method Investments [Line Items]
UPB	339,048	559,317
Notes receivable	213,007	446,257
Carrying Value Over (Under) UPB	(126,041)	(113,060)
Consumer Portfolio Segment | Past Due | Total Rithm Capital Stockholders’ Equity | Upgrade
Schedule of Equity Method Investments [Line Items]
UPB	218,978	0
Notes receivable	206,775	0
Carrying Value Over (Under) UPB	$ (12,203)	$ 0