Investments - Schedule of Investment Portfolio at Amortized Cost and Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Summary of Investment Holdings [Line Items]
Amortized Cost	$ 4,019,503	$ 2,208,817
Fair Value	$ 4,021,111	$ 2,197,053
% of Total Investments at Fair Value	100.00%	100.00%
First Lien Debt
Summary of Investment Holdings [Line Items]
Amortized Cost	$ 3,770,323	$ 1,942,665
Fair Value	$ 3,773,432	$ 1,942,843
% of Total Investments at Fair Value	93.84%	88.43%
Second Lien Debt
Summary of Investment Holdings [Line Items]
Amortized Cost	$ 188,782	$ 234,306
Fair Value	$ 186,913	$ 226,318
% of Total Investments at Fair Value	4.65%	10.30%
Equity and Other Investments
Summary of Investment Holdings [Line Items]
Amortized Cost	$ 60,398	$ 31,846
Fair Value	$ 60,766	$ 27,892
% of Total Investments at Fair Value	1.51%	1.27%