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Debt Obligations, Net - Narrative (Details) $ / shares in Units, $ in Thousands		1 Months Ended
	Sep. 30, 2025 USD ($) $ / shares	Aug. 31, 2025 USD ($)	Jun. 30, 2025	Jan. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Debt Instrument [Line Items]
Face amount	$ 4,373,768				$ 3,482,175
Corporate Debt: \| 7.75% convertible senior notes \| Convertible Debt
Debt Instrument [Line Items]
Face amount	$ 297,170	$ 50,000			$ 247,170
Weighted average interest rate (as percent)	7.75%				7.75%
Debt instrument, interest rate (as a percent)		7.75%
Net proceeds from issuance of convertible debt		$ 48,000
Debt instrument, convertible, conversion price \| $ / shares	$ 10.45
Convertible debt, conversion ratio	0.0956823
Corporate Debt: \| 9.125% Senior Notes \| Unsecured Debt
Debt Instrument [Line Items]
Face amount	$ 59,127			$ 90,000	$ 60,000
Weighted average interest rate (as percent)	9.125%			9.125%	9.125%
Redemption price				100.00%
Recourse Subordinate Securities Financing Receivable \| Sequoia and other third-party securities \| Affiliated Entity \| Unsecuritized Jumbo Loans
Debt Instrument [Line Items]
Long-term debt, weighted average interest rate, over time			7.27%
Recourse Subordinate Securities Financing Receivable \| Sequoia and other third-party securities \| Affiliated Entity \| Unsecuritized Jumbo Loans \| June 2027 Through July 2028
Debt Instrument [Line Items]
Long-term debt, weighted average interest rate, over time			10.27%