Commitments and Contingencies - Schedule of Principal Debt Repayments (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
2024 (remaining)	$ 2,249,402
2025	2,531,803
2026	5,344,883
2027	3,900,110
2028	532,939
Thereafter	1,678,437
Net book value	$ 16,237,574
Amortization percentage	1.00%
Securitized debt obligations excluded from contractual obligations	$ 2,300,000
Nonconsolidated securitized debt excluded from contractual obligations	742,600
Net loan exposure, loan participations sold	335,300
Loan participations sold, net, Face Amount	335,280	$ 337,721
Secured Debt
Debt Instrument [Line Items]
2024 (remaining)	2,232,905
2025	1,661,438
2026	4,042,308
2027	3,251,934
2028	524,681
Thereafter	690,183
Net book value	12,403,449
Asset-Specific Debt
Debt Instrument [Line Items]
2024 (remaining)	0
2025	848,368
2026	0
2027	0
2028	0
Thereafter	216,116
Net book value	1,064,484
Term Loans
Debt Instrument [Line Items]
2024 (remaining)	16,497
2025	21,997
2026	1,302,575
2027	8,258
2028	8,258
Thereafter	772,138
Net book value	2,129,723
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
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