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Debt Obligations - Credit and Repurchase Facilities (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2024 | Dec. 31, 2023 | Jun. 30, 2024 | Apr. 30, 2024 | Mar. 31, 2024 | Feb. 29, 2024
Debt Obligations |  |  |  |  |  |
Debt Carrying Value | $ 3,257,719 | $ 3,237,827 |  |  |  |
Collateral Carrying Value | $ 4,647,278 | 4,606,657 |  |  |  |
Wtd. Avg. Note Rate | 7.38% |  |  |  |  |
Outstanding principal balance repaid | $ 31,400 | 43,100 |  |  |  |
Structured Business |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |
Debt Carrying Value | 2,938,300 | 2,824,501 |  |  |  |
Collateral Carrying Value | $ 4,323,145 | 4,062,162 |  |  |  |
Wtd. Avg. Note Rate | 7.49% |  |  |  |  |
Deferred financing fees | $ 6,100 | 4,800 |  |  |  |
Structured Business | $1.9B joint repurchase facility |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |
Maximum borrowing capacity | 1,900,000 |  |  |  |  |
Debt Carrying Value | 692,187 | 868,077 |  |  |  |
Collateral Carrying Value | $ 1,131,634 | 1,371,436 |  |  |  |
Wtd. Avg. Note Rate | 7.36% |  |  |  |  |
Structured Business | $1B repurchase facility |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |
Maximum borrowing capacity | $ 1,000,000 |  |  |  |  |
Debt Carrying Value | 164,403 | 385,779 |  |  |  |
Collateral Carrying Value | $ 262,020 | 589,533 |  |  |  |
Wtd. Avg. Note Rate | 7.43% |  |  |  |  |
Structured Business | $1B repurchase facility |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |
Maximum borrowing capacity | $ 1,000,000 |  |  |  | $ 1,000,000 |
Debt Carrying Value | 749,244 | 447,490 |  |  |  |
Collateral Carrying Value | $ 1,011,816 | 597,205 |  |  |  |
Wtd. Avg. Note Rate | 7.51% |  |  |  |  |
Expiration period after the lender provides written notice | 6 months |  |  |  |  |
Line of credit facility, repurchase period | 6 months |  |  |  |  |
Structured Business | $649M repurchase facility |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |
Maximum borrowing capacity | $ 649,000 |  |  |  |  |
Debt Carrying Value | 490,019 | 355,328 |  |  |  |
Collateral Carrying Value | $ 667,585 | 506,753 |  |  |  |
Wtd. Avg. Note Rate | 7.44% |  |  |  |  |
Structured Business | $400M credit facility |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |
Maximum borrowing capacity | $ 400,000 |  |  |  |  |
Debt Carrying Value | 131,818 | 0 |  |  |  |
Collateral Carrying Value | $ 198,666 | 0 |  |  |  |
Wtd. Avg. Note Rate | 8.21% |  |  |  |  |
Structured Business | $350M repurchase facility |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |
Maximum borrowing capacity | $ 350,000 |  |  |  | $ 350,000 |
Debt Carrying Value | 134,009 | 262,820 |  |  |  |
Collateral Carrying Value | $ 203,135 | 362,465 |  |  |  |
Wtd. Avg. Note Rate | 7.05% |  |  |  |  |
Length of extension option |  |  |  |  | 1 year |
Structured Business | $250M credit facility |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |
Maximum borrowing capacity | $ 250,000 |  |  |  | $ 250,000 |
Debt Carrying Value | 140,842 | 0 |  |  |  |
Collateral Carrying Value | $ 271,985 | 0 |  |  |  |
Wtd. Avg. Note Rate | 8.21% |  |  |  |  |
Length of extension option | 1 year |  |  |  | 1 year |
Structured Business | $250M repurchase facility |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |
Maximum borrowing capacity | $ 250,000 |  |  |  |  |
Debt Carrying Value | 0 | 0 |  |  |  |
Collateral Carrying Value | $ 0 | 0 |  |  |  |
Wtd. Avg. Note Rate | 0.00% |  |  |  |  |
Length of extension option | 1 year |  |  |  |  |
Structured Business | $250M repurchase facility |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |
Maximum borrowing capacity | $ 250,000 |  |  |  |  |
Debt Carrying Value | 0 | 17,964 |  |  |  |
Collateral Carrying Value | $ 0 | 23,088 |  |  |  |
Wtd. Avg. Note Rate | 0.00% |  |  |  |  |
Structured Business | $250M credit facility |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |
Maximum borrowing capacity | $ 250,000 |  |  |  |  |
Debt Carrying Value | 0 | 0 |  |  |  |
Collateral Carrying Value | $ 0 | 0 |  |  |  |
Wtd. Avg. Note Rate | 0.00% |  |  |  |  |
Structured Business | $200M repurchase facility |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |
Maximum borrowing capacity | $ 200,000 |  |  |  |  |
Debt Carrying Value | 110,095 | 45,969 |  |  |  |
Collateral Carrying Value | $ 154,402 | 68,762 |  |  |  |
Wtd. Avg. Note Rate | 7.50% |  |  |  |  |
Structured Business | $200M repurchase facility |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |
Maximum borrowing capacity | $ 200,000 |  |  |  |  |
Debt Carrying Value | 62,253 | 107,324 |  |  |  |
Collateral Carrying Value | $ 92,634 | 141,130 |  |  |  |
Wtd. Avg. Note Rate | 6.89% |  |  |  |  |
Structured Business | $150M repurchase facility |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |
Maximum borrowing capacity | $ 150,000 |  |  |  |  |
Debt Carrying Value | 82,801 | 120,610 |  |  |  |
Collateral Carrying Value | $ 110,694 | 162,068 |  |  |  |
Wtd. Avg. Note Rate | 7.95% |  |  |  |  |
Structured Business | $143M loan specific credit facilities |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |
Maximum borrowing capacity | $ 143,000 |  |  |  |  |
Debt Carrying Value | 143,117 | 120,328 |  |  |  |
Collateral Carrying Value | $ 193,964 | 161,700 |  |  |  |
Wtd. Avg. Note Rate | 7.39% |  |  |  |  |
Structured Business | $100M credit facility |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |
Maximum borrowing capacity | $ 100,000 |  |  | $ 100,000 |  |
Debt Carrying Value | 0 | 32,579 |  |  |  |
Collateral Carrying Value | $ 0 | 41,522 |  |  |  |
Wtd. Avg. Note Rate | 0.00% |  |  |  |  |
Structured Business | $50M credit facility |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |
Maximum borrowing capacity | $ 50,000 |  |  |  |  |
Debt Carrying Value | 0 | 29,200 |  |  |  |
Collateral Carrying Value | $ 0 | 36,500 |  |  |  |
Wtd. Avg. Note Rate | 0.00% |  |  |  |  |
Structured Business | $40M credit facility |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |
Maximum borrowing capacity | $ 40,000 |  |  |  |  |
Debt Carrying Value | 15,550 | 0 |  |  |  |
Collateral Carrying Value | $ 24,610 | 0 |  |  |  |
Wtd. Avg. Note Rate | 7.30% |  |  |  |  |
Structured Business | $35M working capital facility |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |
Maximum borrowing capacity | $ 35,000 |  |  |  |  |
Debt Carrying Value | 0 | 0 |  |  |  |
Collateral Carrying Value | $ 0 | 0 |  |  |  |
Wtd. Avg. Note Rate | 0.00% |  |  |  |  |
Structured Business | Repurchase facility - securities |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |
Debt Carrying Value | $ 21,962 | 31,033 |  |  |  |
Collateral Carrying Value | $ 0 | 0 |  |  |  |
Wtd. Avg. Note Rate | 6.64% |  |  |  |  |
Structured Business | $500M repurchase facility |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  | $ 500,000
Structured Business | $200M credit facility |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  | $ 200,000 |
Agency Business |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |
Debt Carrying Value | $ 319,419 | 413,326 |  |  |  |
Collateral Carrying Value | $ 324,133 | 544,495 |  |  |  |
Wtd. Avg. Note Rate | 6.37% |  |  |  |  |
Deferred financing fees | $ 200 | 300 |  |  |  |
Agency Business | $100M credit facility |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |
Maximum borrowing capacity | 100,000 |  |  |  |  |
Debt Carrying Value | 17,514 | 0 |  |  |  |
Collateral Carrying Value | $ 17,550 | 0 |  |  |  |
Wtd. Avg. Note Rate | 6.31% |  |  |  |  |
Agency Business | $50M credit facility |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |
Maximum borrowing capacity | $ 50,000 |  |  |  |  |
Debt Carrying Value | 5,245 | 29,083 |  |  |  |
Collateral Carrying Value | $ 5,245 | 29,418 |  |  |  |
Wtd. Avg. Note Rate | 6.31% |  |  |  |  |
Agency Business | $750M ASAP agreement |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |
Maximum borrowing capacity | $ 750,000 |  |  |  |  |
Debt Carrying Value | 17,445 | 73,011 |  |  |  |
Collateral Carrying Value | $ 17,474 | 73,781 |  |  |  |
Wtd. Avg. Note Rate | 6.31% |  |  |  |  |
Agency Business | $500M repurchase facility |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |
Maximum borrowing capacity | $ 500,000 |  | $ 500,000 |  |  |
Debt Carrying Value | 197,646 | 115,730 |  |  |  |
Collateral Carrying Value | $ 198,148 | 241,895 |  |  |  |
Wtd. Avg. Note Rate | 6.33% |  |  |  |  |
Agency Business | $200M credit facility |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |
Maximum borrowing capacity | $ 200,000 |  |  |  |  |
Debt Carrying Value | 73,315 | 187,138 |  |  |  |
Collateral Carrying Value | $ 73,563 | 187,185 |  |  |  |
Wtd. Avg. Note Rate | 6.36% |  |  |  |  |
Agency Business | $100M joint repurchase facility |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |
Maximum borrowing capacity | $ 100,000 |  |  |  |  |
Debt Carrying Value | 7,921 | 7,833 |  |  |  |
Collateral Carrying Value | $ 11,329 | 11,350 |  |  |  |
Wtd. Avg. Note Rate | 7.58% |  |  |  |  |
Agency Business | $1M repurchase facility |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |
Maximum borrowing capacity | $ 1,000 |  |  |  |  |
Debt Carrying Value | 333 | 531 |  |  |  |
Collateral Carrying Value | $ 824 | $ 866 |  |  |  |
Wtd. Avg. Note Rate | 7.30% |  |  |  |  |
Structured and Agency Business | $3 Billion joint repurchase facility |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  | $ 3,000,000
Structured and Agency Business | $2 Billion joint repurchase facility |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  | $ 2,000,000 |

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