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Debt - Narrative (Details)		1 Months Ended	3 Months Ended		9 Months Ended
	Apr. 30, 2024 USD ($)	Aug. 31, 2022 USD ($)	Sep. 30, 2024 USD ($) loanPool securitization	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) securitization facility trust	Sep. 30, 2023 USD ($)	Jun. 30, 2024 USD ($)	Feb. 26, 2024 USD ($)	Dec. 31, 2023 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Debt Instrument [Line Items]
Number of outstanding facility | loanPool			1
Percentage of guarantors beneficial interest (in percentage)			100.00%		100.00%
Cash collateral			$ 0		$ 0				$ 3,756,000
Convertible senior notes			0		0				103,516,000
Proceeds used to repurchase and retire securities			0	$ 16,154,000	0	$ 16,154,000	$ 0		$ 16,644,000	$ 15,614,000	$ 12,153,000
Convertible notes payable
Debt Instrument [Line Items]
Interest expense			$ 0	1,900,000	$ 300,000	5,900,000
Repurchase agreement
Debt Instrument [Line Items]
Interest rate (in percent)			6.16%		6.16%				7.44%
Amount outstanding			$ 231,464,000		$ 231,464,000				$ 375,745,000
Servicing agreement | Minimum | Gregory Funding LLC
Debt Instrument [Line Items]
Servicing fee rate, loans securitization (in percent)			0.42%		0.42%
Mortgage loans | Non-rated secured borrowings
Debt Instrument [Line Items]
Number of securitizations outstanding | securitization			0		0
Mortgage loans | Rated secured borrowings
Debt Instrument [Line Items]
Number of securitizations outstanding | securitization			4		4
Mortgage loans | Repurchase agreement
Debt Instrument [Line Items]
Number of facilities repurchased | facility					4
Convertible notes payable
Debt Instrument [Line Items]
Repayments of debt	$ 103,500,000
Accrued interest period (in days)	15 days
Unpaid principal balance			$ 0		$ 0
Interest rate (in percent)			7.25%		7.25%
Interest expense			$ 2,700,000	2,700,000	$ 7,400,000	7,900,000
Amortization of debt discount			0	0	0	200,000
Amortization of debt discount and deferred expenses			200,000	$ 200,000	$ 600,000	$ 600,000
Senior notes
Debt Instrument [Line Items]
Basis points					1.00%
Senior notes | 8.875% Senior Unsecured Notes Due September 2027
Debt Instrument [Line Items]
Interest rate (in percent)		8.875%
Aggregate principal		$ 110,000,000.0
Debt instrument, term (in years)		5 years
Issuance amount, amount of par value (percent)		0.99009
Proceeds from unsecured notes payable		$ 106,100,000
Proceeds used to repurchase and retire securities			90,000,000.0		$ 90,000,000.0
Amount outstanding			$ 110,000,000.0		$ 110,000,000.0				110,000,000.0
Interest rate, effective percentage			10.24%	9.98%	10.24%	9.98%
Senior notes | 9.875% Senior Unsecured Notes Due September 2027
Debt Instrument [Line Items]
Interest rate (in percent)			9.875%		9.875%
Notes Payable
Debt Instrument [Line Items]
Debt issuance costs, net			$ 2,600,000		$ 2,600,000				$ 3,200,000
Line of Credit | Rithm | Secured Debt
Debt Instrument [Line Items]
Aggregate principal								$ 70,000,000.0
Amount outstanding			$ 0		$ 0
Delaware Trust | Mortgage loans | Repurchase agreement
Debt Instrument [Line Items]
Number of facilities repurchased | facility					2
Number of wholly-owned Delaware trusts | trust					2
Delaware Trust | Mortgage loans | Repurchase agreement | Minimum
Debt Instrument [Line Items]
Percentage of purchase price for each mortgage loan or REO (in percentage)					75.00%
Delaware Trust | Mortgage loans | Repurchase agreement | Maximum
Debt Instrument [Line Items]
Percentage of purchase price for each mortgage loan or REO (in percentage)					90.00%

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