INVESTMENTS - Schedule of Investments (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
Investments at fair value	2,058,541	[1]	1,706,163	[2]
Subordinated Debt, Second Lien
Schedule of Investments [Line Items]
Amortized Cost	77,227		100,711
Investments at fair value	64,121		97,203
Subordinated Debt, Mezzanine Debt
Schedule of Investments [Line Items]
Amortized Cost	95,284		86,495
Investments at fair value	89,329		83,528
Structured Debt
Schedule of Investments [Line Items]
Amortized Cost	4,254		3,247
Investments at fair value	$ 1,242		$ 2,656
Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	100.00%		100.00%
First Lien Term Loans
Schedule of Investments [Line Items]
Amortized Cost	$ 1,818,109		$ 1,450,120
Fair Value	$ 1,803,988		$ 1,427,492
First Lien Term Loans | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	90.61%		86.95%
Subordinated Debt
Schedule of Investments [Line Items]
Amortized Cost	$ 176,765		$ 190,454
Fair Value	$ 154,692		$ 183,387
Subordinated Debt | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	7.77%		11.17%
Equity Investments
Schedule of Investments [Line Items]
Amortized Cost	$ 28,510		$ 25,595
Fair Value	32,176		30,807
Investments at fair value	$ 32,176	[1]	$ 30,807	[2]
Equity Investments | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	1.62%		1.88%

[1] Investment valued using unobservable inputs (Level 3). See Note 2 “Significant Accounting Policies – Valuation of Portfolio Investments” and Note 4 "Fair Value Measurements" for more information.

[2] Investment valued using unobservable inputs (Level 3). See Note 2 “Significant Accounting Policies – Valuation of Portfolio Investments” and Note 4 "Fair Value Measurements" for more information.