Loans Receivable, Net - Activity Relating to Loans Receivable Portfolio (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Principal Balance
Beginning balance	$ 25,160,343
Loan fundings	369,812
Loan repayments and sales proceeds	(592,361)
Unrealized gain (loss) on foreign currency translation	82,695
Ending balance	25,020,489
Deferred Fees / Other Items
Beginning balance	(142,463)
Unrealized gain (loss) on foreign currency translation	(567)
Deferred fees and other items	(2,850)
Amortization of fees and other items	21,755
Ending balance	(124,125)
Net Book Value
Beginning balance	25,017,880
Loan fundings	369,812
Loan repayments and sales proceeds	(592,361)
Unrealized gain (loss) on foreign currency translation	82,128
Deferred fees and other items	(2,850)
Amortization of fees and other items	21,755
Ending balance	24,896,364
CECL reserve	(336,591)	$ (326,137)	$ (122,221)	$ (124,679)
Loans receivable, net	$ 24,559,773	$ 24,691,743