Secured Debt, Net - Schedule of Secured Credit Facilities (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2025 USD ($) lender loan	Dec. 31, 2024 USD ($)
Schedule Of Secured Credit Facilities [Line Items]
Total secured debt	$ 13,317,843
Secured debt, net | Line of Credit
Schedule Of Secured Credit Facilities [Line Items]
Collateral	$ 908,000
Secured debt, net | Line of Credit | Secured credit facilities
Schedule Of Secured Credit Facilities [Line Items]
Lenders | lender	14
Total secured debt	$ 10,011,541	$ 9,705,529
Loan Count | loan	120
Collateral	$ 14,779,404	$ 14,807,821
Secured debt, net | Weighted Average | Line of Credit | Secured credit facilities
Schedule Of Secured Credit Facilities [Line Items]
Recourse Limitation	34.00%
Secured debt, net | Minimum | Line of Credit | Secured credit facilities
Schedule Of Secured Credit Facilities [Line Items]
Recourse Limitation	25.00%
Secured debt, net | Maximum | Line of Credit | Secured credit facilities
Schedule Of Secured Credit Facilities [Line Items]
Recourse Limitation	100.00%
Secured debt, net | USD | Line of Credit | Secured credit facilities
Schedule Of Secured Credit Facilities [Line Items]
Lenders | lender	13
Total secured debt	$ 4,492,461
Loan Count | loan	87
Collateral	$ 7,501,830
Secured debt, net | USD | Weighted Average | Line of Credit | Secured credit facilities
Schedule Of Secured Credit Facilities [Line Items]
Recourse Limitation	39.00%
Secured debt, net | USD | Minimum | Line of Credit | Secured credit facilities
Schedule Of Secured Credit Facilities [Line Items]
Recourse Limitation	25.00%
Secured debt, net | USD | Maximum | Line of Credit | Secured credit facilities
Schedule Of Secured Credit Facilities [Line Items]
Recourse Limitation	100.00%
Secured debt, net | GBP | Line of Credit | Secured credit facilities
Schedule Of Secured Credit Facilities [Line Items]
Lenders | lender	6
Total secured debt	$ 2,301,773
Loan Count | loan	16
Collateral	$ 3,049,147
Secured debt, net | GBP | Weighted Average | Line of Credit | Secured credit facilities
Schedule Of Secured Credit Facilities [Line Items]
Recourse Limitation	25.00%
Secured debt, net | GBP | Minimum | Line of Credit | Secured credit facilities
Schedule Of Secured Credit Facilities [Line Items]
Recourse Limitation	25.00%
Secured debt, net | EUR | Line of Credit | Secured credit facilities
Schedule Of Secured Credit Facilities [Line Items]
Lenders | lender	7
Total secured debt	$ 1,757,902
Loan Count | loan	10
Collateral	$ 2,404,172
Secured debt, net | EUR | Weighted Average | Line of Credit | Secured credit facilities
Schedule Of Secured Credit Facilities [Line Items]
Recourse Limitation	38.00%
Secured debt, net | EUR | Minimum | Line of Credit | Secured credit facilities
Schedule Of Secured Credit Facilities [Line Items]
Recourse Limitation	25.00%
Secured debt, net | EUR | Maximum | Line of Credit | Secured credit facilities
Schedule Of Secured Credit Facilities [Line Items]
Recourse Limitation	100.00%
Secured debt, net | Others | Line of Credit | Secured credit facilities
Schedule Of Secured Credit Facilities [Line Items]
Lenders | lender	4
Total secured debt	$ 1,459,405
Loan Count | loan	7
Collateral	$ 1,824,255
Recourse Limitation	25.00%
Secured debt, net | Others | Weighted Average | Line of Credit | Secured credit facilities
Schedule Of Secured Credit Facilities [Line Items]
Recourse Limitation	25.00%