Other Assets and Liabilities - Summary of Components of Other Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Other Assets And Liabilities Disclosure [Abstract]
Accrued interest receivable	$ 169,849	$ 160,131
Loan portfolio payments held by servicer	94,322	113,199
Collateral deposited under derivative agreements	86,420	4,810
Real estate intangible assets, net	71,124	77,289
Accounts receivable and other assets	57,725	134,030
Other real estate assets	15,492	9,338
Derivative assets	12,267	72,454
Prepaid expenses	635	1,002
Total	507,834	572,253
Cash collateral	$ 46,600	$ 95,500