MSR Related Financing Liabilities, at Fair Value - Narrative (Details) - USD ($) $ in Thousands		1 Months Ended		3 Months Ended			9 Months Ended
	May 02, 2022	Jun. 30, 2026	May 31, 2026	Sep. 30, 2026	Jun. 30, 2026	Mar. 31, 2026	Sep. 30, 2026	Dec. 31, 2025
Servicing Assets at Fair Value [Line Items]
Automatic renewal term	1 year
MSR related financing liabilities, at fair value				$ 613,100			$ 613,100	$ 842,000
Financing Liability Mortgage Servicing Rights Pledged [Member]
Servicing Assets at Fair Value [Line Items]
MSR related financing liabilities, at fair value				346,800			346,800	$ 573,200
Rithm Capital Corp
Servicing Assets at Fair Value [Line Items]
RMSR				3,400,000			4,600,000
Subservicing Assets \| Rithm
Servicing Assets at Fair Value [Line Items]
UPB of rights to MSRs sold				500,000			500,000
Fair Value Non-Agency Mortgage Servicing Rights \| Rithm Capital Corp
Servicing Assets at Fair Value [Line Items]
RMSR				3,400,000	$ 0	$ 1,200,000	4,600,000
Subservicing		$ 10,000,000	$ 11,200,000	600,000	$ 21,200,000	$ 600,000	22,400,000
2017 Agreements and New RMSR Agreements \| Mortgage Servicing Rights Title Retained \| Rithm
Servicing Assets at Fair Value [Line Items]
UPB of rights to MSRs sold				3,300,000			3,300,000
2017 Agreements and New RMSR Agreements \| Mortgage Servicing Rights Title Retained \| Rithm Capital Corp
Servicing Assets at Fair Value [Line Items]
UPB of rights to MSRs sold				3,300,000			3,300,000
Original Rights to Mortgage Servicing Rights Agreements \| Financing Liability Mortgage Servicing Rights Pledged [Member]
Servicing Assets at Fair Value [Line Items]
MSR related financing liabilities, at fair value				$ 38,500			$ 38,500