Commitments and Contingencies - Schedule of Principal Debt Repayments (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
2024 (remaining)	$ 2,001,553
2025	2,431,633
2026	5,401,088
2027	3,872,332
2028	525,268
Thereafter	1,768,697
Net book value	16,000,571
Total loan exposure including non-consolidated senior interests	725,400	$ 1,100,000
Loan participations sold, net, Face Amount	100,580	337,721
Secured debt, net
Debt Instrument [Line Items]
2024 (remaining)	1,990,555
2025	1,532,338
2026	4,098,513
2027	3,224,156
2028	517,010
Thereafter	748,004
Net book value	12,110,576	12,697,058
Asset-specific debt, net
Debt Instrument [Line Items]
2024 (remaining)	0
2025	877,298
2026	0
2027	0
2028	0
Thereafter	248,556
Net book value	1,125,854	1,004,097
Term Loans
Debt Instrument [Line Items]
2024 (remaining)	10,998
2025	21,997
2026	1,302,575
2027	8,258
2028	8,258
Thereafter	772,137
Net book value	$ 2,124,223	2,135,221
Amortization percentage	1.00%
Senior Secured Notes
Debt Instrument [Line Items]
2024 (remaining)	$ 0
2025	0
2026	0
2027	339,918
2028	0
Thereafter	0
Net book value	339,918	366,090
Convertible Notes
Debt Instrument [Line Items]
2024 (remaining)	0
2025	0
2026	0
2027	300,000
2028	0
Thereafter	0
Net book value	300,000	300,000
Securitized debt obligations, net
Debt Instrument [Line Items]
Net book value	$ 2,328,492	$ 2,507,514