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Other Assets and Liabilities - Summary of Components of Other Liabilities (Detail) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024 | Sep. 30, 2024
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Other Assets And Liabilities Disclosure [Abstract] |  |  |
Debt repayments pending servicer remittance | $ 335,433 | $ 3,742 |
Other real estate liabilities | 114,413 | 72,018 |
Accrued dividends payable | 80,238 | 81,214 | $ 81,306
Accrued interest payable | 64,911 | 77,855 |
Management fee payable | 16,849 | 18,534 |
Current expected credit loss reserves for unfunded loan commitments | 13,741 | 10,412 | $ 8,300
Accounts payable and other liabilities | 11,230 | 13,834 |
Derivative liabilities | 2,557 | 5,238 |
Other liabilities | $ 639,372 | $ 282,847 |

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