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Fair Value of Financial Instruments - Schedule of Valuation for Level 3 Assets (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance at beginning of period | $ 4,062,425 | $ 3,327,211
Total gains/(losses) (realized/unrealized) |  |
Included in earnings | 48,852 | (9,009)
Transfers out | (23,165) | (21,066)
Transfer to securitization trust, net | 0 | 0
Paydowns/Distributions | (361,819) | (241,006)
Sales | (8,352) | (28,912)
Purchases/Acquisitions | 396,845 | 305,735
Balance at the end of period | $ 4,114,786 | $ 3,332,953
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Other Operating Income (Expense), Net | Other Operating Income (Expense), Net
Residential loans |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance at beginning of period | $ 632,266 | $ 827,535
Total gains/(losses) (realized/unrealized) |  |
Included in earnings | 5,857 | (2,924)
Transfers out | (22,506) | (18,180)
Transfer to securitization trust, net | (464,214) | (370,804)
Paydowns/Distributions | (56,731) | (62,718)
Sales | (2,075) | (22,204)
Purchases/Acquisitions | 352,965 | 290,024
Balance at the end of period | 445,562 | 640,729
Residential loans | Consolidated SLST | VIE, Primary Beneficiary |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance at beginning of period | 965,672 | 754,860
Total gains/(losses) (realized/unrealized) |  |
Included in earnings | 11,743 | (138)
Transfers out | 0 | 0
Transfer to securitization trust, net | 0 | 0
Paydowns/Distributions | (18,165) | (16,596)
Sales | 0 | 0
Purchases/Acquisitions | 0 | 0
Balance at the end of period | 959,250 | 738,126
Residential loans held in securitization trusts |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance at beginning of period | 2,243,800 | 1,501,908
Total gains/(losses) (realized/unrealized) |  |
Included in earnings | 25,378 | (1,773)
Transfers out | (659) | (2,886)
Transfer to securitization trust, net | 464,214 | 370,804
Paydowns/Distributions | (261,880) | (152,806)
Sales | (6,277) | (6,708)
Purchases/Acquisitions | 43,880 | 15,711
Balance at the end of period | 2,508,456 | 1,724,250
Multi-family loans |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance at beginning of period | 86,192 | 95,792
Total gains/(losses) (realized/unrealized) |  |
Included in earnings | 2,991 | (2,137)
Transfers out | 0 | 0
Transfer to securitization trust, net | 0 | 0
Paydowns/Distributions | (1,961) | (1,750)
Sales | 0 | 0
Purchases/Acquisitions | 0 | 0
Balance at the end of period | 87,222 | 91,905
Equity investments |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance at beginning of period | 113,492 | 147,116
Total gains/(losses) (realized/unrealized) |  |
Included in earnings | 3,589 | (2,037)
Transfers out | 0 | 0
Transfer to securitization trust, net | 0 | 0
Paydowns/Distributions | (23,082) | (7,136)
Sales | 0 | 0
Purchases/Acquisitions | 0 | 0
Balance at the end of period | 93,999 | $ 137,943
Mortgage servicing rights |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance at beginning of period | 21,003 |
Total gains/(losses) (realized/unrealized) |  |
Included in earnings | (706) |
Transfers out | 0 |
Transfer to securitization trust, net | 0 |
Paydowns/Distributions |  |
Sales | 0 |
Purchases/Acquisitions |  |
Balance at the end of period | $ 20,297 |

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