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Segment Reporting - Summary of Financial Information (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Segment Reporting Information [Line Items] |  |  |
Interest Income | $ 605,597 | $ 482,419 | $ 362,302
Interest Expense | 429,118 | 258,843 | 120,385
Net Interest Income/(Expense) | 176,479 | 223,576 | 241,917
Reversal of Provision/(Provision) for Credit Losses on Residential Whole Loans | 8,853 | 2,646 | 44,863
Provision for Credit Losses on Other Assets | 0 | (28,579) | 0
Net Interest Income after Provision for Credit Losses | 185,332 | 197,643 | 286,780
Net gain on residential whole loans measured at fair value through earnings | 89,850 | (866,762) | 16,243
Impairment and other net gain/(loss) on securities and other portfolio investments | 6,225 | (25,067) | 74,496
Net gain on real estate owned | 9,392 | 25,379 | 22,838
Net gain/(loss) on derivatives used for risk management purposes | 3,761 | 255,179 | 1,426
Net loss on securitized debt measured at fair value through earnings | (99,589) | 290,639 | 15,027
Lima One - origination, servicing and other fee income | 43,384 | 46,745 | 22,600
Net realized loss on residential whole loans held at carrying value | (1,240) | 0 | 0
Other, net | 11,331 | 8,623 | 9,647
Other Income/(Loss), net | 63,114 | (265,264) | 162,277
Compensation and benefits | 85,799 | 76,728 | 53,817
General and administrative expenses | 44,147 | 35,138 | 28,903
Loan servicing, financing and other related costs | 34,136 | 42,894 | 30,867
Amortization of intangible assets | 4,200 | 9,200 | 6,600
Net Income/(Loss) | 80,164 | (231,581) | 328,870
Less Preferred Stock Dividend Requirement | 32,875 | 32,875 | 32,875
Net Income/(Loss) Available to Common Stock and Participating Securities | 47,289 | (264,456) | 295,995
Total Assets | 10,772,690 | 9,112,405 |
Operating Segments | Mortgage-Related Assets |  |  |
Segment Reporting Information [Line Items] |  |  |
Interest Income | 364,081 | 364,761 | 347,863
Interest Expense | 249,458 | 176,725 | 99,905
Net Interest Income/(Expense) | 114,623 | 188,036 | 247,958
Reversal of Provision/(Provision) for Credit Losses on Residential Whole Loans | 8,539 | 2,842 | 44,981
Provision for Credit Losses on Other Assets |  | 0 |
Net Interest Income after Provision for Credit Losses | 123,162 | 190,878 | 292,939
Net gain on residential whole loans measured at fair value through earnings | 69,486 | (730,028) | (2,719)
Impairment and other net gain/(loss) on securities and other portfolio investments | 8,073 | (3,146) | 1,607
Net gain on real estate owned | 9,274 | 25,348 | 22,760
Net gain/(loss) on derivatives used for risk management purposes | 839 | 217,961 | 1,457
Net loss on securitized debt measured at fair value through earnings | (66,969) | 231,176 | 14,594
Lima One - origination, servicing and other fee income | 0 | 0 | 0
Net realized loss on residential whole loans held at carrying value | (1,240) |  |
Other, net | 7,960 | 4,282 | 759
Other Income/(Loss), net | 27,423 | (254,407) | 38,458
Compensation and benefits | 0 | 0 | 0
General and administrative expenses | 214 | 0 | 0
Loan servicing, financing and other related costs | 20,100 | 25,384 | 25,250
Amortization of intangible assets | 0 | 0 | 0
Net Income/(Loss) | 130,271 | (88,913) | 306,147
Less Preferred Stock Dividend Requirement | 0 | 0 | 0
Net Income/(Loss) Available to Common Stock and Participating Securities | 130,271 | (88,913) | 306,147
Total Assets | 6,370,237 | 6,065,557 |
Operating Segments | Lima One |  |  |
Segment Reporting Information [Line Items] |  |  |
Interest Income | 228,825 | 113,134 | 14,249
Interest Expense | 164,059 | 66,358 | 4,691
Net Interest Income/(Expense) | 64,766 | 46,776 | 9,558
Reversal of Provision/(Provision) for Credit Losses on Residential Whole Loans | 314 | (196) | (118)
Provision for Credit Losses on Other Assets |  | 0 |
Net Interest Income after Provision for Credit Losses | 65,080 | 46,580 | 9,440
Net gain on residential whole loans measured at fair value through earnings | 20,364 | (136,734) | 18,962
Impairment and other net gain/(loss) on securities and other portfolio investments | 0 | 0 | 0
Net gain on real estate owned | 118 | 31 | 78
Net gain/(loss) on derivatives used for risk management purposes | 2,922 | 37,218 | (31)
Net loss on securitized debt measured at fair value through earnings | (32,620) | 59,463 | 433
Lima One - origination, servicing and other fee income | 43,384 | 46,745 | 22,600
Net realized loss on residential whole loans held at carrying value | 0 |  |
Other, net | 2,284 | 537 | 128
Other Income/(Loss), net | 36,452 | 7,260 | 42,170
Compensation and benefits | 44,827 | 39,241 | 18,130
General and administrative expenses | 17,537 | 13,944 | 6,010
Loan servicing, financing and other related costs | 1,515 | 1,120 | 436
Amortization of intangible assets | 4,200 | 9,200 | 6,600
Net Income/(Loss) | 33,453 | (9,665) | 20,434
Less Preferred Stock Dividend Requirement | 0 | 0 | 0
Net Income/(Loss) Available to Common Stock and Participating Securities | 33,453 | (9,665) | 20,434
Total Assets | 4,000,932 | 2,618,695 |
Corporate |  |  |
Segment Reporting Information [Line Items] |  |  |
Interest Income | 12,691 | 4,524 | 190
Interest Expense | 15,601 | 15,760 | 15,789
Net Interest Income/(Expense) | (2,910) | (11,236) | (15,599)
Reversal of Provision/(Provision) for Credit Losses on Residential Whole Loans | 0 | 0 | 0
Provision for Credit Losses on Other Assets |  | (28,579) |
Net Interest Income after Provision for Credit Losses | (2,910) | (39,815) | (15,599)
Net gain on residential whole loans measured at fair value through earnings | 0 | 0 | 0
Impairment and other net gain/(loss) on securities and other portfolio investments | (1,848) | (21,921) | 72,889
Net gain on real estate owned | 0 | 0 | 0
Net gain/(loss) on derivatives used for risk management purposes | 0 | 0 | 0
Net loss on securitized debt measured at fair value through earnings | 0 | 0 | 0
Lima One - origination, servicing and other fee income | 0 | 0 | 0
Net realized loss on residential whole loans held at carrying value | 0 |  |
Other, net | 1,087 | 3,804 | 8,760
Other Income/(Loss), net | (761) | (18,117) | 81,649
Compensation and benefits | 40,972 | 37,487 | 35,687
General and administrative expenses | 26,396 | 21,194 | 22,893
Loan servicing, financing and other related costs | 12,521 | 16,390 | 5,181
Amortization of intangible assets | 0 | 0 | 0
Net Income/(Loss) | (83,560) | (133,003) | 2,289
Less Preferred Stock Dividend Requirement | 32,875 | 32,875 | 32,875
Net Income/(Loss) Available to Common Stock and Participating Securities | (116,435) | (165,878) | $ (30,586)
Total Assets | $ 401,521 | $ 428,153 |

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