Investments at Fair Value - Summary of Investments at Fair Value (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$ 3,037,826	$ 809,029
Fair Value	3,099,151	808,801
Net Unrealized Gain (Loss)	61,325	(228)
First-lien Debt Investments
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	2,792,928	801,223
Fair Value	2,850,885	800,995
Net Unrealized Gain (Loss)	57,957	(228)
Second-lien Debt Investments
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	77,895
Fair Value	79,091
Net Unrealized Gain (Loss)	1,196
Mezzanine Debt Investments
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	104,352
Fair Value	106,524
Net Unrealized Gain (Loss)	2,172
Equity and Other Investments
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	62,651	7,806
Fair Value	$ 62,651	$ 7,806