Investments at Fair Value - Summary of Investments at Fair Value (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$ 7,079,994	$ 3,037,826
Fair Value	7,244,282	3,099,151
Net Unrealized Gain (Loss)	164,288	61,325
First-lien Debt Investments
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	6,732,065	2,792,928
Fair Value	6,871,809	2,850,885
Net Unrealized Gain (Loss)	139,744	57,957
Second-lien Debt Investments
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	89,461	77,895
Fair Value	94,778	79,091
Net Unrealized Gain (Loss)	5,317	1,196
Mezzanine Debt Investments
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	118,441	104,352
Fair Value	123,184	106,524
Net Unrealized Gain (Loss)	4,743	2,172
Equity and Other Investments
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	140,027	62,651
Fair Value	154,511	$ 62,651
Net Unrealized Gain (Loss)	$ 14,484