Loans Receivable, Net - Activity Relating to Loans Receivable Portfolio (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Principal Balance
Beginning balance	$ 23,923,719
Loan fundings	626,746
Loan repayments, sales, and cost-recovery proceeds	(1,225,525)
Charge-offs	(85,318)
Transfer to real estate owned	(60,203)	$ 0
Transfer to other assets	(10,795)
Payment-in-kind interest, net of interest received	6,164
Unrealized (loss) gain on foreign currency translation	(164,128)
Ending balance	23,010,660
Deferred Fees / Other Items
Beginning balance	(136,707)
Loan repayments, sales, and cost-recovery proceeds	(35,361)
Charge-offs	11,768
Unrealized (loss) gain on foreign currency translation	755
Deferred fees and other items	(13,967)
Amortization of fees and other items	33,700	43,697
Ending balance	(139,812)
Net Book Value
Beginning balance	23,787,012
Loan fundings	626,746
Loan repayments, sales, and cost-recovery proceeds	(1,260,886)
Charge-offs	(73,550)
Transfer to real estate owned	(60,203)	0
Transfer to other assets	(10,795)
Payment-in-kind interest, net of interest received	6,164
Unrealized (loss) gain on foreign currency translation	(163,373)
Deferred fees and other items	(13,967)
Amortization of fees and other items	33,700	43,697
Ending balance	22,870,848
CECL reserve	(893,938)	$ (363,875)	$ (751,370)	$ (576,936)	$ (336,591)	$ (326,137)
Loans receivable, net	$ 21,976,910			$ 23,210,076