Variable Interest Entities - Assets and Liabilities of Consolidated VIEs (Detail) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2023
Assets
Cash and cash equivalents	$ 668,563	$ 323,483
Loans receivable	19,049,712	19,047,518
Current expected credit loss reserve	(741,541)	(733,936)	$ (751,370)	$ (576,936)
Loans receivable, net	18,308,171	18,313,582
Real estate owned, net	619,796	588,185
Other assets	331,925	572,253
Total Assets	19,957,475	19,801,955
Liabilities
Other liabilities	341,277	282,847
Total Liabilities	16,268,757	16,007,766
Securitized debt obligations, net
Liabilities
Securitized debt obligations, net	2,559,896	1,936,956
VIE
Assets
Cash and cash equivalents	13,804	9,145
Loans receivable	3,208,455	2,338,201
Current expected credit loss reserve	(162,258)	(202,400)
Loans receivable, net	3,046,197	2,135,801
Real estate owned, net	212,011	177,322
Other assets	79,409	126,518
Total Assets	3,351,421	2,448,786
Liabilities
Other liabilities	15,598	13,277
Total Liabilities	2,575,494	1,950,233
VIE | Securitized debt obligations, net
Liabilities
Securitized debt obligations, net	$ 2,559,896	$ 1,936,956