Borrowings - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Asset coverage ratio	226.50%	221.90%
Interest expense, payable	$ 391,200	$ 311,200
Unused borrowing capacity fee payable	$ 6,800	$ 11,400
Weighted average interest rate	7.13%	6.93%	4.03%
Weighted average interest rate all-in	7.27%	7.06%	5.52%
Accretion of original issue discount	$ 37,786	$ 31,362	$ 25,136
Average amount outstanding	25,294,000	$ 24,905,900	$ 23,930,700
Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Accretion of original issue discount	$ 4,700