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Debt Obligations - Credit and Repurchase Facilities (Details) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Oct. 31, 2021 | Dec. 31, 2021 | Dec. 31, 2020
Debt Obligations |  |  |
UPB |  | $ 4,493,699 | $ 2,238,722
Debt Carrying Value |  | 4,481,579 | 2,234,883
Collateral Carrying Value |  | $ 5,585,460 | $ 2,724,420
Weighted Average Note Rate (as a percent) |  | 2.21% | 2.20%
Utilization of credit facility | $ 67,000 |  |
Minimum |  |  |
Debt Obligations |  |  |
Maximum advance rate |  | 75.00% |
Maximum |  |  |
Debt Obligations |  |  |
Maximum advance rate |  | 85.00% |
$50M credit facility |  |  |
Debt Obligations |  |  |
UPB |  | $ 9,295 | $ 88,911
Debt Carrying Value |  | 9,295 | 88,896
Collateral Carrying Value |  | $ 9,295 | $ 88,911
Weighted Average Note Rate (as a percent) |  | 1.40% | 1.65%
$25M credit facility. |  |  |
Debt Obligations |  |  |
UPB |  | $ 10,285 | $ 9,539
Debt Carrying Value |  | 10,218 | 9,323
Collateral Carrying Value |  | $ 14,773 | $ 14,340
Weighted Average Note Rate (as a percent) |  | 2.38% | 2.43%
Joint Repurchase Facility |  |  |
Debt Obligations |  |  |
Maximum borrowing capacity |  | $ 2,500,000 |
Additional borrowing capacity |  | $ 150,000 |
Extension of maturity date (in years) |  | 1 year |
Joint Repurchase Facility | Private Label |  |  |
Debt Obligations |  |  |
Maximum advance rate |  | 80.00% |
Joint Repurchase Facility | Structured loans |  |  |
Debt Obligations |  |  |
Maximum advance rate |  | 85.00% |
Joint Repurchase Facility | LIBOR |  |  |
Debt Obligations |  |  |
Variable rate, spread (as a percent) |  | 5.75% |
Structured Transaction Business |  |  |
Debt Obligations |  |  |
UPB |  | $ 3,533,016 | $ 1,286,100
Debt Carrying Value |  | 3,525,307 | 1,282,845
Collateral Carrying Value |  | $ 4,548,653 | $ 1,755,825
Weighted Average Note Rate (as a percent) |  | 2.34% | 2.73%
Unamortized deferred finance costs |  | $ 7,700 | $ 3,300
Weighted average note rate including certain fees and costs (as a percent) |  | 2.51% | 2.97%
Leverage on loans and investment portfolio financed through credit facilities and repurchase agreements, excluding securities repurchase facility, working capital line of credit and security agreement used to finance leasehold and capital expenditure improvements at corporate office (as a percent) |  | 77.00% | 69.00%
Structured Transaction Business | LIBOR |  |  |
Debt Obligations |  |  |
LIBOR Floor rate |  | 0.25% |
Variable rate, spread (as a percent) |  | 3.25% |
Structured Transaction Business | B Piece bonds |  |  |
Debt Obligations |  |  |
Debt Instrument, Collateral Amount |  | $ 47,600 | $ 57,800
Structured Transaction Business | SFR - Fixed Rate |  |  |
Debt Obligations |  |  |
Collateral Carrying Value |  | $ 10,000 |
Structured Transaction Business | Senior mortgage loans |  |  |
Debt Obligations |  |  |
Weighted Average Note Rate (as a percent) |  | 4.01% |
Structured Transaction Business | $2.00B joint repurchase facility |  |  |
Debt Obligations |  |  |
UPB |  | $ 1,490,434 | 682,958
Debt Carrying Value |  | 1,486,380 | 681,006
Collateral Carrying Value |  | $ 1,877,930 | $ 1,054,562
Weighted Average Note Rate (as a percent) |  | 2.56% | 2.55%
Maximum borrowing capacity |  | $ 2,000,000 |
Structured Transaction Business | $1.00B repurchase facility |  |  |
Debt Obligations |  |  |
UPB |  | 676,608 | $ 192,193
Debt Carrying Value |  | 675,415 | 191,622
Collateral Carrying Value |  | $ 937,880 | $ 259,559
Weighted Average Note Rate (as a percent) |  | 2.04% | 2.99%
Maximum borrowing capacity |  | $ 1,000,000 |
Structured Transaction Business | $1.00B repurchase facility | LIBOR |  |  |
Debt Obligations |  |  |
Maximum advance rate |  | 75.00% |
LIBOR Floor rate |  | 0.35% |
Decrease in interest rate (as a percent) |  | 0.20% |
Structured Transaction Business | $1.00B repurchase facility | Minimum | LIBOR |  |  |
Debt Obligations |  |  |
Maximum advance rate |  | 2.00% |
LIBOR Floor rate |  | 0.35% |
Line of Credit Facility, Interest Rate at Period End |  | 2.00% |
Utilization of credit facility |  | $ 250,000 |
Structured Transaction Business | $1.00B repurchase facility | Maximum | LIBOR |  |  |
Debt Obligations |  |  |
LIBOR Floor rate |  | 0.35% |
Variable rate, spread (as a percent) |  | 1.75% |
Line of Credit Facility, Interest Rate at Period End |  | 2.20% |
Utilization of credit facility |  | $ 250,000 |
Structured Transaction Business | $450M repurchase facility |  |  |
Debt Obligations |  |  |
UPB |  | 397,842 |
Debt Carrying Value |  | 397,272 |
Collateral Carrying Value |  | $ 511,269 |
Weighted Average Note Rate (as a percent) |  | 1.89% |
Maximum borrowing capacity |  | $ 450,000 |
Structured Transaction Business | $450M repurchase facility | Minimum |  |  |
Debt Obligations |  |  |
Variable rate, spread (as a percent) |  | 2.00% |
Structured Transaction Business | $450M repurchase facility | Minimum | Multifamily |  |  |
Debt Obligations |  |  |
Variable rate, spread (as a percent) |  | 1.75% |
Structured Transaction Business | $450M repurchase facility | Maximum | Multifamily |  |  |
Debt Obligations |  |  |
Variable rate, spread (as a percent) |  | 2.25% |
Structured Transaction Business | $450M repurchase facility | Maximum | LIBOR |  |  |
Debt Obligations |  |  |
Variable rate, spread (as a percent) |  | 2.75% |
Structured Transaction Business | $398.7M repurchase facility (2) |  |  |
Debt Obligations |  |  |
UPB |  | $ 242,034 | $ 71,656
Debt Carrying Value |  | 241,450 | 71,627
Collateral Carrying Value |  | $ 289,956 | $ 87,242
Weighted Average Note Rate (as a percent) |  | 3.04% | 2.73%
Maximum borrowing capacity |  | $ 398,700 |
Structured Transaction Business | $325M repurchase facility |  |  |
Debt Obligations |  |  |
UPB |  | 294,145 | $ 31,780
Debt Carrying Value |  | 293,700 | 31,780
Collateral Carrying Value |  | $ 385,337 | $ 40,551
Weighted Average Note Rate (as a percent) |  | 1.76% | 1.92%
Maximum borrowing capacity |  | $ 325,000 |
Structured Transaction Business | $225M credit facility |  |  |
Debt Obligations |  |  |
UPB |  | 28,213 | $ 23,857
Debt Carrying Value |  | 27,826 | 23,606
Collateral Carrying Value |  | $ 42,270 | $ 31,809
Weighted Average Note Rate (as a percent) |  | 2.79% | 4.06%
Maximum borrowing capacity |  | $ 225,000 |
Structured Transaction Business | $225M credit facility | LIBOR |  |  |
Debt Obligations |  |  |
Variable rate, spread (as a percent) |  | 2.50% |
Structured Transaction Business | $225M credit facility | Minimum | SFR - Fixed Rate |  |  |
Debt Obligations |  |  |
LIBOR Floor rate |  | 2.75% |
Structured Transaction Business | $225M credit facility | Maximum | SFR - Fixed Rate |  |  |
Debt Obligations |  |  |
LIBOR Floor rate |  | 3.85% |
Structured Transaction Business | $200M credit facility |  |  |
Debt Obligations |  |  |
UPB |  | $ 177,599 | $ 39,389
Debt Carrying Value |  | 177,406 | 39,346
Collateral Carrying Value |  | $ 236,538 | $ 47,912
Weighted Average Note Rate (as a percent) |  | 1.70% | 2.24%
Maximum borrowing capacity |  | $ 200,000 |
Structured Transaction Business | $200M credit facility | SOFR | Multifamily |  |  |
Debt Obligations |  |  |
Variable rate, spread (as a percent) |  | 1.61% |
Structured Transaction Business | $200M credit facility | SOFR | Independent living facilities |  |  |
Debt Obligations |  |  |
Variable rate, spread (as a percent) |  | 2.31% |
Structured Transaction Business | $200M credit facility | SOFR | Assisted living facilities |  |  |
Debt Obligations |  |  |
Variable rate, spread (as a percent) |  | 2.56% |
Structured Transaction Business | $200M credit facility | LIBOR |  |  |
Debt Obligations |  |  |
LIBOR Floor rate |  | 0.25% |
Variable rate, spread (as a percent) |  | 1.35% |
Structured Transaction Business | $200M credit facility | Healthcare Related Loans | SOFR | Assisted living facilities |  |  |
Debt Obligations |  |  |
Additional borrowing capacity |  | $ 25,000 |
Structured Transaction Business | $153.9M loan specific credit facilities |  |  |
Debt Obligations |  |  |
UPB |  | 153,937 | $ 148,798
Debt Carrying Value |  | 153,727 | 148,615
Collateral Carrying Value |  | $ 214,300 | $ 198,550
Weighted Average Note Rate (as a percent) |  | 3.14% | 3.03%
Maximum borrowing capacity |  | $ 153,900 |
Structured Transaction Business | $153.9M loan specific credit facilities | Prime Rate |  |  |
Debt Obligations |  |  |
Fixed interest rate (as a percent) |  | 3.25% |
Structured Transaction Business | $153.9M loan specific credit facilities | Minimum |  |  |
Debt Obligations |  |  |
Fixed interest rate (as a percent) |  | 3.00% |
Structured Transaction Business | $153.9M loan specific credit facilities | Minimum | LIBOR |  |  |
Debt Obligations |  |  |
Variable rate, spread (as a percent) |  | 2.20% |
Structured Transaction Business | $153.9M loan specific credit facilities | Maximum |  |  |
Debt Obligations |  |  |
Fixed interest rate (as a percent) |  | 4.00% |
Structured Transaction Business | $153.9M loan specific credit facilities | Maximum | LIBOR |  |  |
Debt Obligations |  |  |
Variable rate, spread (as a percent) |  | 2.40% |
Structured Transaction Business | $50M credit facility |  |  |
Debt Obligations |  |  |
UPB |  | $ 29,200 | $ 16,002
Debt Carrying Value |  | 29,194 | 15,992
Collateral Carrying Value |  | $ 36,500 | $ 21,300
Weighted Average Note Rate (as a percent) |  | 2.13% | 2.17%
Maximum borrowing capacity |  | $ 50,000 |
Structured Transaction Business | $50M credit facility | LIBOR |  |  |
Debt Obligations |  |  |
Variable rate, spread (as a percent) |  | 2.00% |
Structured Transaction Business | $30M working capital facility |  |  |
Debt Obligations |  |  |
UPB |  |  | $ 30,000
Debt Carrying Value |  |  | $ 30,000
Weighted Average Note Rate (as a percent) |  |  | 3.55%
Maximum borrowing capacity |  | $ 30,000 |
Structured Transaction Business | $30M working capital facility | LIBOR |  |  |
Debt Obligations |  |  |
LIBOR Floor rate |  | 0.25% |
Variable rate, spread (as a percent) |  | 3.25% |
Structured Transaction Business | $25M credit facility |  |  |
Debt Obligations |  |  |
UPB |  | $ 1,235 |
Debt Carrying Value |  | 1,235 |
Collateral Carrying Value |  | $ 1,900 |
Weighted Average Note Rate (as a percent) |  | 4.06% |
Maximum borrowing capacity |  | $ 25,000 |
Structured Transaction Business | $25M credit facility | LIBOR |  |  |
Debt Obligations |  |  |
LIBOR Floor rate |  | 3.85% |
Variable rate, spread (as a percent) |  | 2.50% |
Structured Transaction Business | $25M credit facility. |  |  |
Debt Obligations |  |  |
Maximum borrowing capacity |  | $ 25,000 |
Structured Transaction Business | $25M credit facility. | SOFR |  |  |
Debt Obligations |  |  |
Variable rate, spread (as a percent) |  | 2.35% |
Structured Transaction Business | $1M master security agreement |  |  |
Debt Obligations |  |  |
UPB |  | $ 635 | $ 1,441
Debt Carrying Value |  | $ 635 | $ 1,441
Weighted Average Note Rate (as a percent) |  | 4.01% | 4.10%
Maximum borrowing capacity |  | $ 1,000 |
Structured Transaction Business | Repurchase facility - securities (3) |  |  |
Debt Obligations |  |  |
UPB |  | 30,849 | $ 38,487
Debt Carrying Value |  | $ 30,849 | $ 38,487
Weighted Average Note Rate (as a percent) |  | 3.40% | 3.47%
Structured Transaction Business | $150M credit facility | SOFR |  |  |
Debt Obligations |  |  |
Maximum borrowing capacity |  | $ 150,000 |
Variable rate, spread (as a percent) |  | 1.46% |
Additional borrowing capacity |  | $ 50,000 |
Decrease in interest rate (as a percent) |  | 1.86% |
Structured Transaction Business | $400M repurchase facility |  |  |
Debt Obligations |  |  |
Maximum borrowing capacity |  | $ 400,000 |
Structured Transaction Business | $400M repurchase facility | SOFR |  |  |
Debt Obligations |  |  |
LIBOR Floor rate |  | 0.25% |
Structured Transaction Business | $400M repurchase facility | Minimum | SOFR |  |  |
Debt Obligations |  |  |
Variable rate, spread (as a percent) |  | 1.75% |
Structured Transaction Business | $400M repurchase facility | Maximum | SOFR |  |  |
Debt Obligations |  |  |
Variable rate, spread (as a percent) |  | 2.25% |
Structured Transaction Business | $200 million repurchase facility |  |  |
Debt Obligations |  |  |
Maximum borrowing capacity |  | $ 200,000 |
Additional borrowing capacity |  | 325,000 |
Agency Business |  |  |
Debt Obligations |  |  |
UPB |  | 960,683 | $ 952,622
Debt Carrying Value |  | 956,272 | 952,038
Collateral Carrying Value |  | $ 1,036,807 | $ 968,595
Weighted Average Note Rate (as a percent) |  | 1.75% | 1.48%
Unamortized deferred finance costs |  | $ 4,400 | $ 600
Agency Business | Fannie Mae Mortgage |  |  |
Debt Obligations |  |  |
Letters of Credit Outstanding, Amount |  | 45,000 |
Agency Business | Freddie Mac Mortgage |  |  |
Debt Obligations |  |  |
Committed amount |  | 5,000 |
Letters of Credit Outstanding, Amount |  | 5,000 |
Agency Business | $200M credit facility |  |  |
Debt Obligations |  |  |
UPB |  | 115,351 | 294,815
Debt Carrying Value |  | 115,304 | 294,732
Collateral Carrying Value |  | $ 115,351 | $ 296,698
Weighted Average Note Rate (as a percent) |  | 1.60% | 1.30%
Maximum borrowing capacity |  | $ 200,000 |
Agency Business | $50M credit facility |  |  |
Debt Obligations |  |  |
Maximum borrowing capacity |  | $ 50,000 |
Fixed interest rate (as a percent) |  | 2.875% |
Variable rate, spread (as a percent) |  | 1.30% |
Agency Business | $750M ASAP agreement |  |  |
Debt Obligations |  |  |
UPB |  | $ 182,130 | $ 301,455
Debt Carrying Value |  | 182,130 | 301,455
Collateral Carrying Value |  | $ 182,140 | $ 302,491
Weighted Average Note Rate (as a percent) |  | 1.40% | 1.40%
Maximum borrowing capacity |  | $ 750,000 |
LIBOR Floor rate |  | 0.25% |
Debt Instrument, Reduced Basis Spread on Variable Rate |  | 1.26% |
Debt Instrument, Collateral Amount |  | $ 750,000 |
Agency Business | $500M joint repurchase facility |  |  |
Debt Obligations |  |  |
UPB |  | 399,470 | $ 43,132
Debt Carrying Value |  | 395,317 | 42,808
Collateral Carrying Value |  | $ 475,360 | $ 56,186
Weighted Average Note Rate (as a percent) |  | 2.11% | 2.07%
Maximum borrowing capacity |  | $ 500,000 |
Agency Business | $500M repurchase facility |  |  |
Debt Obligations |  |  |
UPB |  | 236,527 | $ 174,555
Debt Carrying Value |  | 236,429 | 174,515
Collateral Carrying Value |  | $ 236,527 | $ 174,555
Weighted Average Note Rate (as a percent) |  | 1.58% | 1.64%
Maximum borrowing capacity |  | $ 500,000 |
Agency Business | $150M credit facility |  |  |
Debt Obligations |  |  |
UPB |  | 16,657 | $ 49,754
Debt Carrying Value |  | 16,544 | 49,632
Collateral Carrying Value |  | $ 16,657 | $ 49,754
Weighted Average Note Rate (as a percent) |  | 1.51% | 1.65%
Maximum borrowing capacity |  | $ 150,000 |
Agency Business | $1.3M repurchase facility (2) |  |  |
Debt Obligations |  |  |
UPB |  | 1,253 |
Debt Carrying Value |  | 1,253 |
Collateral Carrying Value |  | $ 1,477 |
Weighted Average Note Rate (as a percent) |  | 3.00% |
Maximum borrowing capacity |  | $ 1,300 |
Agency Business | $400M repurchase facility | LIBOR |  |  |
Debt Obligations |  |  |
Maximum borrowing capacity |  | $ 500,000 |
Debt Instrument, Reduced Basis Spread on Variable Rate |  | 1.48% |

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