INVESTMENTS - Schedules of Portfolio Composition by Geographic Composition of Investments at Cost and Fair Value (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Schedule of Investments [Line Items]
Amortized Cost	$ 2,023,384	$ 1,666,169
Fair Value	$ 1,990,856	$ 1,641,686
Fair Value as % of Net Assets	201.83%	219.51%
Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	100.00%	100.00%
United States
Schedule of Investments [Line Items]
Amortized Cost	$ 1,943,985	$ 1,613,815
Fair Value	$ 1,911,471	$ 1,589,384
Fair Value as % of Net Assets	193.79%	212.52%
United States | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	96.01%	96.82%
Canada
Schedule of Investments [Line Items]
Amortized Cost	$ 43,625	$ 38,462
Fair Value	$ 43,729	$ 38,292
Fair Value as % of Net Assets	4.43%	5.12%
Canada | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	2.20%	2.33%
United Kingdom
Schedule of Investments [Line Items]
Amortized Cost	$ 35,774	$ 13,892
Fair Value	$ 35,656	$ 14,010
Fair Value as % of Net Assets	3.61%	1.87%
United Kingdom | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	1.79%	0.85%