Credit Facilities and Commercial Paper Programs - Fund Credit Facilities (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2026 USD ($) extension_option	Dec. 31, 2025 USD ($)
Credit facility
Revolving credit facilities origination costs, net	$ 22,400	$ 25,246
Fund Credit Facilities
Credit facility
Maximum borrowing capacity	$ 1,380,000
Debt term	12 months
Number of extensions | extension_option	2
Term of extension option	6 months
Aggregate amount the facilities can be increased	$ 2,000,000
Basis spread on variable rate (as a percent)	1.05%
Current borrowing capacity	$ 1,300,000	1,200,000
Weighted average borrowing rate during the period (as a percent)	5.00%
Weighted average interest rate (as a percent)	4.70%
Revolving credit facilities origination costs, net	$ 5,700	6,200
Fund Credit Facilities | Line of Credit | Revolving credit facility
Credit facility
Maximum borrowing capacity	$ 1,000,000
Commitment fee (as a percent)	0.15%
Amounts drawn on the facility since its inception	$ 125,000	$ 182,000
Fund Credit Facilities | Unsecured Debt
Credit facility
Maximum borrowing capacity	$ 380,000
Commitment fee (as a percent)	0.20%
Fund Credit Facilities | Unsecured Delayed Draw Term Loan
Credit facility
Revolving credit facilities origination costs, net	$ 3,000