Other Assets and Liabilities - Summary of Components of Other Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Other Assets And Liabilities Disclosure [Abstract]
Accrued interest receivable	$ 146,587	$ 160,131
Accounts receivable and other assets	11,326	134,030
Loan portfolio payments held by servicer	1,886	113,199
Real estate intangible assets, net	81,381	77,289
Derivative assets	4,987	72,454
Other Real Estate Assets	15,072	9,338
Collateral deposited under derivative agreements	69,640	4,810
Prepaid expenses	1,046	1,002
Total	$ 331,925	572,253
Cash collateral		$ 95,500