Loans Receivable, Net - Activity Relating to Loans Receivable Portfolio (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Principal Balance
Beginning balance	$ 25,160,343	$ 22,156,437
Loan fundings	1,344,130	6,810,218
Loan repayments, sales, and cost-recovery proceeds	(2,871,423)	(3,168,155)
Payment-in-kind interest, net of interest received	2,865	0	$ 0
Unrealized gain (loss) on foreign currency translation	287,804	(638,157)
Ending balance	23,923,719	25,160,343	22,156,437
Deferred Fees / Other Items
Beginning balance	(142,463)	(153,420)
Loan repayments, sales, and cost-recovery proceeds	(52,978)
Unrealized gain (loss) on foreign currency translation	(1,702)	5,255
Deferred fees and other items	(17,992)	(74,930)
Amortization of fees and other items	78,428	80,632
Ending balance	(136,707)	(142,463)	(153,420)
Net Book Value
Beginning balance	25,017,880	22,003,017
Loan fundings	1,344,130	6,810,218
Loan repayments, sales, and cost-recovery proceeds	(2,924,401)
Unrealized gain (loss) on foreign currency translation	286,102	(632,902)
Deferred fees and other items	(17,992)	(74,930)
Amortization of fees and other items	78,428	80,632
Ending balance	23,787,012	25,017,880	22,003,017
CECL reserve	(576,936)	(326,137)	$ (124,679)
Loans receivable, net	$ 23,210,076	$ 24,691,743