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Asset-Backed Securities Issued - Schedule of Asset-Backed Securities Issued (Details) $ in Thousands | Jun. 30, 2024 USD ($) series trust | Dec. 31, 2023 USD ($) series trust
--- | --- | ---
Debt Instrument [Line Items] |  |
Principal Amount | $ 3,434,945 | $ 3,249,158
CAFL |  |
Debt Instrument [Line Items] |  |
Number of bridge securitization trusts | trust | 2 | 2
Asset-backed securities issued |  |
Debt Instrument [Line Items] |  |
ABS Issued, Net | $ 11,555,550 | $ 9,811,880
Asset-backed securities issued | Revision of Prior Period, Accounting Standards Update, Adjustment |  |
Debt Instrument [Line Items] |  |
ABS Issued, Net | (1,060,684) | (943,370)
Asset-backed securities issued | Deferred Debt Issuance Costs |  |
Debt Instrument [Line Items] |  |
Unamortized debt discount and deferred debt issuance costs | (3,093) | (5,929)
Asset-backed securities issued | Certificates with principal balance |  |
Debt Instrument [Line Items] |  |
ABS Issued, Net | 12,466,549 | 10,588,659
Asset-backed securities issued | Interest-only certificates at fair value |  |
Debt Instrument [Line Items] |  |
ABS Issued, Net | 152,778 | 172,520
Asset-backed securities issued | Sequoia |  |
Debt Instrument [Line Items] |  |
ABS Issued, Net | $ 6,686,531 | $ 4,568,660
Number of series | series | 48 | 42
Asset-backed securities issued | Sequoia | Revision of Prior Period, Accounting Standards Update, Adjustment |  |
Debt Instrument [Line Items] |  |
ABS Issued, Net | $ (757,641) | $ (635,260)
Asset-backed securities issued | Sequoia | Deferred Debt Issuance Costs |  |
Debt Instrument [Line Items] |  |
Unamortized debt discount and deferred debt issuance costs | $ 0 | $ 0
Asset-backed securities issued | Sequoia | Minimum |  |
Debt Instrument [Line Items] |  |
Range of weighted average interest rates, by series (as a percent) | 2.67% | 2.67%
Asset-backed securities issued | Sequoia | Maximum |  |
Debt Instrument [Line Items] |  |
Range of weighted average interest rates, by series (as a percent) | 6.71% | 6.66%
Asset-backed securities issued | Sequoia | Certificates with principal balance |  |
Debt Instrument [Line Items] |  |
ABS Issued, Net | $ 7,393,323 | $ 5,151,646
Asset-backed securities issued | Sequoia | Interest-only certificates at fair value |  |
Debt Instrument [Line Items] |  |
ABS Issued, Net | 50,849 | 52,274
Asset-backed securities issued | CAFL |  |
Debt Instrument [Line Items] |  |
ABS Issued, Net | $ 3,058,191 | $ 3,362,978
Number of series | series | 20 | 21
Asset-backed securities issued | CAFL | Revision of Prior Period, Accounting Standards Update, Adjustment |  |
Debt Instrument [Line Items] |  |
ABS Issued, Net | $ (200,903) | $ (209,740)
Asset-backed securities issued | CAFL | Deferred Debt Issuance Costs |  |
Debt Instrument [Line Items] |  |
Unamortized debt discount and deferred debt issuance costs | $ 0 | $ (1,935)
Asset-backed securities issued | CAFL | Minimum |  |
Debt Instrument [Line Items] |  |
Range of weighted average interest rates, by series (as a percent) | 2.31% | 2.34%
Asset-backed securities issued | CAFL | Maximum |  |
Debt Instrument [Line Items] |  |
Range of weighted average interest rates, by series (as a percent) | 7.89% | 7.89%
Asset-backed securities issued | CAFL | Certificates with principal balance |  |
Debt Instrument [Line Items] |  |
ABS Issued, Net | $ 3,172,393 | $ 3,472,825
Asset-backed securities issued | CAFL | Interest-only certificates at fair value |  |
Debt Instrument [Line Items] |  |
ABS Issued, Net | 86,701 | 101,828
Asset-backed securities issued | Freddie Mac SLST |  |
Debt Instrument [Line Items] |  |
ABS Issued, Net | $ 1,204,834 | $ 1,265,777
Number of series | series | 3 | 3
Principal Amount | $ 166,000 | $ 182,000
Asset-backed securities issued | Freddie Mac SLST | Revision of Prior Period, Accounting Standards Update, Adjustment |  |
Debt Instrument [Line Items] |  |
ABS Issued, Net | (84,650) | (72,742)
Asset-backed securities issued | Freddie Mac SLST | Deferred Debt Issuance Costs |  |
Debt Instrument [Line Items] |  |
Unamortized debt discount and deferred debt issuance costs | $ (3,093) | $ (3,994)
Asset-backed securities issued | Freddie Mac SLST | Minimum |  |
Debt Instrument [Line Items] |  |
Range of weighted average interest rates, by series (as a percent) | 3.50% | 3.50%
Asset-backed securities issued | Freddie Mac SLST | Maximum |  |
Debt Instrument [Line Items] |  |
Range of weighted average interest rates, by series (as a percent) | 7.50% | 7.50%
Asset-backed securities issued | Freddie Mac SLST | Certificates with principal balance |  |
Debt Instrument [Line Items] |  |
ABS Issued, Net | $ 1,280,405 | $ 1,328,657
Asset-backed securities issued | Freddie Mac SLST | Interest-only certificates at fair value |  |
Debt Instrument [Line Items] |  |
ABS Issued, Net | 12,172 | 13,856
Asset-backed securities issued | Freddie Mac K-Series |  |
Debt Instrument [Line Items] |  |
ABS Issued, Net | $ 387,791 | $ 391,977
Range of weighted average interest rates, by series (as a percent) | 3.41% | 3.55%
Number of series | series | 1 | 1
Asset-backed securities issued | Freddie Mac K-Series | Revision of Prior Period, Accounting Standards Update, Adjustment |  |
Debt Instrument [Line Items] |  |
ABS Issued, Net | $ (13,392) | $ (14,985)
Asset-backed securities issued | Freddie Mac K-Series | Deferred Debt Issuance Costs |  |
Debt Instrument [Line Items] |  |
Unamortized debt discount and deferred debt issuance costs | 0 | 0
Asset-backed securities issued | Freddie Mac K-Series | Certificates with principal balance |  |
Debt Instrument [Line Items] |  |
ABS Issued, Net | 398,127 | 402,400
Asset-backed securities issued | Freddie Mac K-Series | Interest-only certificates at fair value |  |
Debt Instrument [Line Items] |  |
ABS Issued, Net | 3,056 | 4,562
Asset-backed securities issued | HEI |  |
Debt Instrument [Line Items] |  |
ABS Issued, Net | $ 218,203 | $ 222,488
Number of series | series | 2 | 2
Asset-backed securities issued | HEI | Revision of Prior Period, Accounting Standards Update, Adjustment |  |
Debt Instrument [Line Items] |  |
ABS Issued, Net | $ (4,098) | $ (10,643)
Asset-backed securities issued | HEI | Deferred Debt Issuance Costs |  |
Debt Instrument [Line Items] |  |
Unamortized debt discount and deferred debt issuance costs | $ 0 | $ 0
Asset-backed securities issued | HEI | Minimum |  |
Debt Instrument [Line Items] |  |
Range of weighted average interest rates, by series (as a percent) | 3.94% | 3.86%
Asset-backed securities issued | HEI | Maximum |  |
Debt Instrument [Line Items] |  |
Range of weighted average interest rates, by series (as a percent) | 6.77% | 6.70%
Asset-backed securities issued | HEI | Certificates with principal balance |  |
Debt Instrument [Line Items] |  |
ABS Issued, Net | $ 222,301 | $ 233,131
Asset-backed securities issued | HEI | Interest-only certificates at fair value |  |
Debt Instrument [Line Items] |  |
ABS Issued, Net | 0 | 0
Asset-backed securities issued | CoreVest |  |
Debt Instrument [Line Items] |  |
Principal Amount | $ 417,000 | $ 485,000

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