Investments - Schedule of Fair Value Portfolio of Investments by Asset Class (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2026	Dec. 31, 2025
Schedule Of Investments [Line Items]
Investments at Fair Value	$ 4,583,870	$ 4,466,647
Warrants
Schedule Of Investments [Line Items]
Investments at Fair Value	51,295	41,162
Investment Type Concentration Risk \| Total Investments Benchmark
Schedule Of Investments [Line Items]
Investments at Fair Value	$ 4,583,870	$ 4,466,647
Percentage of Total Portfolio	100.00%	100.00%
Investment Type Concentration Risk \| Total Investments Benchmark \| Senior Secured Debt
Schedule Of Investments [Line Items]
Investments at Fair Value	$ 4,299,681	$ 4,209,798
Percentage of Total Portfolio	93.80%	94.20%
Investment Type Concentration Risk \| Total Investments Benchmark \| Unsecured Debt
Schedule Of Investments [Line Items]
Investments at Fair Value	$ 76,543	$ 69,614
Percentage of Total Portfolio	1.70%	1.60%
Investment Type Concentration Risk \| Total Investments Benchmark \| Preferred Stock
Schedule Of Investments [Line Items]
Investments at Fair Value	$ 55,378	$ 52,735
Percentage of Total Portfolio	1.20%	1.20%
Investment Type Concentration Risk \| Total Investments Benchmark \| Common Stock
Schedule Of Investments [Line Items]
Investments at Fair Value	$ 93,924	$ 86,275
Percentage of Total Portfolio	2.00%	1.90%
Investment Type Concentration Risk \| Total Investments Benchmark \| Warrants
Schedule Of Investments [Line Items]
Investments at Fair Value	$ 51,295	$ 41,162
Percentage of Total Portfolio	1.10%	0.90%
Investment Type Concentration Risk \| Total Investments Benchmark \| Investment Funds & Vehicles
Schedule Of Investments [Line Items]
Investments at Fair Value	$ 7,049	$ 7,063
Percentage of Total Portfolio	0.20%	0.20%