Loans Receivable, Net - Activity Relating to Loans Receivable Portfolio (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Principal Balance
Beginning balance	$ 23,923,719	$ 25,160,343
Loan fundings	1,356,208	1,344,130
Loan repayments, sales, and cost-recovery proceeds	(4,663,293)	(2,871,423)
Charge-offs	(419,849)
Transfer to real estate owned	(590,937)	0	$ 0
Transfer to other assets, net	(70,248)	0	0
Payment-in-kind interest, net of interest received	16,660	2,865
Unrealized (loss) gain on foreign currency translation	(349,134)	287,804
Ending balance	19,203,126	23,923,719	25,160,343
Deferred Fees / Other Items
Beginning balance	(136,707)	(142,463)
Loan repayments, sales, and cost-recovery proceeds	(87,993)	(52,978)
Charge-offs	35,246
Unrealized (loss) gain on foreign currency translation	1,406	(1,702)
Deferred fees and other items	(31,693)	(17,992)
Amortization of fees and other items	64,133	78,428	81,748
Ending balance	(155,608)	(136,707)	(142,463)
Net Book Value
Beginning balance	23,787,012	25,017,880
Loan fundings	1,356,208	1,344,130
Loan repayments, sales, and cost-recovery proceeds	(4,751,286)	(2,924,401)
Charge-offs	(384,603)
Transfer to real estate owned	(590,937)	0	0
Transfer to other assets	(70,248)	0	0
Payment-in-kind interest, net of interest received	16,660	2,865
Unrealized (loss) gain on foreign currency translation	(347,728)	286,102
Deferred fees and other items	(31,693)	(17,992)
Amortization of fees and other items	64,133	78,428	81,748
Ending balance	19,047,518	23,787,012	25,017,880
CECL reserve	(733,936)	(576,936)	$ (326,137)
Loans receivable, net	$ 18,313,582	$ 23,210,076