Borrowings - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Debt Disclosure [Abstract]
Interest expense	$ 57.2		$ 57.2		$ 53.4
Unused commitment fees	$ 1.2		$ 1.2		$ 0.6
Weighted average interest rate	4.97%	5.45%	5.00%	5.26%
Weighted average interest rate all-in	5.04%	5.54%	5.08%	5.37%
Average principal debt outstanding	$ 7,345.8	$ 6,299.6	$ 7,271.7	$ 5,717.0