v3.25.4
Fair Value of Financial Instruments - Schedule of Valuation for Level 3 Assets (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Balance at beginning of period $ 4,062,425 $ 3,327,211 $ 3,801,370
Total gains/(losses) (realized/unrealized)      
Included in earnings $ 122,133 $ 33,524 $ 99,357
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 Other Operating Income (Expense), Net
Transfers in $ 150,771    
Transfers out (82,791) $ (88,462) $ (52,791)
Transfers to securitization trust, net 0 0 0
Transfer from residential loans held for sale to residential loans 0    
Transfer from disposal group held for sale 0   0
Funding/Contributions     55,882
Paydowns/Distributions (1,504,594) (1,234,384) (1,171,740)
Sales (620,667) (162,883) (25,144)
Acquisitions/Repurchases 1,573,307 2,187,419 620,277
Originations 840,069    
Balance at the end of period 4,540,653 4,062,425 3,327,211
Residential loans      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Balance at beginning of period 632,266 827,535 1,081,384
Total gains/(losses) (realized/unrealized)      
Included in earnings 16,576 15,562 8,080
Transfers in 580    
Transfers out (37,506) (80,801) (26,277)
Transfers to securitization trust, net (1,325,733) (1,456,376) (282,831)
Transfer from residential loans held for sale to residential loans 474,922    
Transfer from disposal group held for sale 0   0
Funding/Contributions     0
Paydowns/Distributions (183,071) (296,645) (482,137)
Sales (156,627) (156,175) (21,165)
Acquisitions/Repurchases 1,162,556 1,779,166 550,481
Originations 0    
Balance at the end of period 583,963 632,266 827,535
Residential loans | VIE, Primary Beneficiary | Consolidated SLST      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Balance at beginning of period 965,672 754,860 827,582
Total gains/(losses) (realized/unrealized)      
Included in earnings 39,902 3,523 (10,748)
Transfers in 0    
Transfers out 0 0 0
Transfers to securitization trust, net 0 0 0
Transfer from residential loans held for sale to residential loans 0    
Transfer from disposal group held for sale 0   0
Funding/Contributions     0
Paydowns/Distributions (87,302) (77,768) (61,974)
Sales 0 0 0
Acquisitions/Repurchases 247,405 285,057 0
Originations 0    
Balance at the end of period 1,165,677 965,672 754,860
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 1,616,114
Total gains/(losses) (realized/unrealized)      
Included in earnings 47,941 (8,255) 72,173
Transfers in 0    
Transfers out (11,526) (7,661) (16,208)
Transfers to securitization trust, net 1,325,733 1,456,376 282,831
Transfer from residential loans held for sale to residential loans 0    
Transfer from disposal group held for sale 0   0
Funding/Contributions     0
Paydowns/Distributions (1,146,122) (805,586) (518,819)
Sales (13,223) (6,708) (3,979)
Acquisitions/Repurchases 161,932 113,726 69,796
Originations 0    
Balance at the end of period 2,608,535 2,243,800 1,501,908
Residential loans held for sale      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Balance at beginning of period 0    
Total gains/(losses) (realized/unrealized)      
Included in earnings 18,974    
Transfers in 145,748    
Transfers out 0    
Transfers to securitization trust, net 0    
Transfer from residential loans held for sale to residential loans (474,922)    
Transfer from disposal group held for sale 0    
Paydowns/Distributions (259)    
Sales (450,317)    
Acquisitions/Repurchases 1,414    
Originations 840,069    
Balance at the end of period 80,707 0  
Multi-family loans, at fair value      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Balance at beginning of period 86,192 95,792 87,534
Total gains/(losses) (realized/unrealized)      
Included in earnings 9,162 5,899 11,863
Transfers in 0    
Transfers out 0 0 (10,306)
Transfers to securitization trust, net 0 0 0
Transfer from residential loans held for sale to residential loans 0    
Transfer from disposal group held for sale 0   0
Funding/Contributions     21,924
Paydowns/Distributions (39,878) (15,499) (15,223)
Sales 0 0 0
Acquisitions/Repurchases 0 0 0
Originations 0    
Balance at the end of period 55,476 86,192 95,792
Equity investments      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Balance at beginning of period 113,492 147,116 179,746
Total gains/(losses) (realized/unrealized)      
Included in earnings (3,155) 16,179 21,279
Transfers in 0    
Transfers out (33,759) 0 0
Transfers to securitization trust, net 0 0 0
Transfer from residential loans held for sale to residential loans 0    
Transfer from disposal group held for sale (500)   5,720
Funding/Contributions     33,958
Paydowns/Distributions (51,367) (49,803) (93,587)
Sales 0 0 0
Acquisitions/Repurchases 0 0 0
Originations 0    
Balance at the end of period 24,711 113,492 147,116
Assets Held For Sale | Discontinued Operations, Held-for-Sale      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Balance at beginning of period 0    
Total gains/(losses) (realized/unrealized)      
Included in earnings 0    
Transfers in 0    
Transfers out 0    
Transfers to securitization trust, net 0    
Transfer from residential loans held for sale to residential loans 0    
Transfer from disposal group held for sale 500    
Paydowns/Distributions 0    
Sales (500)    
Acquisitions/Repurchases 0    
Originations 0    
Balance at the end of period 0 0  
MSRs      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Balance at beginning of period 21,003 0  
Total gains/(losses) (realized/unrealized)      
Included in earnings (3,656) 616  
Transfers in 141    
Transfers out 0 0  
Transfers to securitization trust, net 0 0  
Transfer from residential loans held for sale to residential loans 0    
Transfer from disposal group held for sale 0    
Paydowns/Distributions 3,405 10,917  
Sales 0 0  
Acquisitions/Repurchases 0 9,470  
Originations 0    
Balance at the end of period 20,893 21,003 0
IRLCs      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Balance at beginning of period 0    
Total gains/(losses) (realized/unrealized)      
Included in earnings (3,611)    
Transfers in 4,302    
Transfers out 0    
Transfers to securitization trust, net 0    
Transfer from residential loans held for sale to residential loans 0    
Transfer from disposal group held for sale 0    
Paydowns/Distributions 0    
Sales 0    
Acquisitions/Repurchases 0    
Originations 0    
Balance at the end of period $ 691 0  
Equity investments in disposal group held for sale      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Balance at beginning of period   $ 0 9,010
Total gains/(losses) (realized/unrealized)      
Included in earnings     (3,290)
Transfers out     0
Transfers to securitization trust, net     0
Transfer from disposal group held for sale     (5,720)
Funding/Contributions     0
Paydowns/Distributions     0
Sales    
Acquisitions/Repurchases     0
Balance at the end of period     $ 0