INVESTMENTS - Composition of Investments at Fair Value (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2025		Dec. 31, 2024
Schedule of Investments [Line Items]
Cost	$ 3,831,207		$ 3,813,127
Fair Value	$ 3,785,496		$ 3,791,494
Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	100.00%		100.00%
Australia
Schedule of Investments [Line Items]
Cost	$ 13,000		$ 8,798
Fair Value	$ 13,153		$ 8,970
Australia | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	0.30%		0.20%
Canada
Schedule of Investments [Line Items]
Cost	$ 118,220		$ 153,734
Fair Value	$ 119,453		$ 154,953
Canada | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	3.20%		4.10%
United Kingdom
Schedule of Investments [Line Items]
Cost	$ 12,507		$ 12,411
Fair Value	$ 12,640		$ 12,196
United Kingdom | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	0.30%		0.30%
United States
Schedule of Investments [Line Items]
Cost	$ 3,687,480		$ 3,638,184
Fair Value	$ 3,640,250		$ 3,615,375
United States | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	96.20%		95.40%
Aerospace & Defense | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	2.20%		2.20%
Air Freight & Logistics | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	0.40%		0.30%
Automobile Components | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	3.10%		3.00%
Automobiles | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	3.70%		3.60%
Beverages | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	0.10%		0.00%
Biotechnology | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	0.70%		0.70%
Building Products | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	0.40%		0.40%
Chemicals | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	0.50%		0.50%
Commercial Services & Supplies | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	9.20%		9.10%
Construction & Engineering | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	2.10%		2.00%
Consumer Staples Distribution & Retail | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	0.70%		0.70%
Containers & Packaging | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	1.20%		1.20%
Distributors | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	2.00%		2.30%
Diversified Consumer Services | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	4.80%		4.70%
Electrical Equipment | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	0.30%		0.10%
Electronic Equipment, Instruments & Components | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	2.20%		2.10%
Financial Services | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	2.90%		2.50%
Food Products | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	1.40%		2.00%
Ground Transportation | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	0.70%		0.60%
Health Care Equipment & Supplies | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	0.30%		0.60%
Health Care Providers & Services | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	4.90%		5.00%
Health Care Technology | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	1.60%		1.60%
Industrial Conglomerates | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	1.50%		1.20%
Insurance Services | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	11.40%		12.00%
Interactive Media & Services | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	2.50%		2.60%
IT Services | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	8.30%		8.90%
Life Sciences Tools & Services | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	0.30%		0.30%
Machinery | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	1.10%		0.90%
Multi-Utilities | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	0.60%		0.60%
Pharmaceuticals | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	0.60%		0.30%
Professional Services | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	4.40%		5.40%
Real Estate Management & Development | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	4.10%		3.60%
Software | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	19.40%		18.90%
Wireless Telecommunication Services | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	0.40%		0.10%
First Lien Debt
Schedule of Investments [Line Items]
Cost	$ 3,682,846		$ 3,669,886
Fair Value	$ 3,650,847		$ 3,654,538
First Lien Debt | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	96.40%		96.50%
Second Lien Debt
Schedule of Investments [Line Items]
Cost	$ 82,435		$ 78,803
Fair Value	$ 71,721		$ 69,367
Second Lien Debt | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	1.90%		1.80%
Other Debt Investments
Schedule of Investments [Line Items]
Cost	$ 11,280		$ 9,755
Fair Value	$ 9,773		$ 9,198
Other Debt Investments | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	0.30%		0.20%
Equity
Schedule of Investments [Line Items]
Cost	$ 54,646	[1],[2],[3]	$ 54,683
Fair Value	$ 53,155	[1],[2]	$ 58,391
Equity | Investment Owned at Fair Value | Investment Type Concentration Risk
Schedule of Investments [Line Items]
% of Total Investments at Fair Value	1.40%		1.50%

[1] Unless otherwise indicated, the Company’s investments are pledged as collateral supporting the amounts outstanding under the Truist Credit Facility (as defined below). See Note 6 “Debt”.

[2] Unless otherwise indicated, issuers of debt and equity investments held by the Company (which such term “Company” shall include the Company’s consolidated subsidiaries for purposes of this Consolidated Schedule of Investments) are denominated in dollars. All debt investments are income producing unless otherwise indicated. All equity investments (including preferred equity investments) are non-income producing unless otherwise noted. Certain portfolio company investments are subject to contractual restrictions on sales. Under the Investment Company Act of 1940, as amended (together with the rules and regulations promulgated thereunder, the “1940 Act”), the Company would be deemed to “control” a portfolio company if the Company owned more than 25% of its outstanding voting securities and/or held the power to exercise control over the management or policies of the portfolio company. As of June 30, 2025 the Company does not “control” any of these portfolio companies. Under the 1940 Act, the Company would be deemed an “affiliated person” of a portfolio company if the Company owns 5% or more of the portfolio company’s outstanding voting securities. As of June 30, 2025, the Company is an “affiliated person” of one of its portfolio companies, as indicated below.

[3] The cost represents the original cost adjusted for the amortization of discounts and premiums, as applicable, on debt investments using the effective interest method.