INVESTMENTS - Investment Portfolio, at Fair Value and Cost (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Jun. 30, 2024		Mar. 31, 2024
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 1,468,126	[1],[2],[3],[4],[5],[6],[7]	$ 1,476,561	[8],[9],[10],[11],[12],[13],[14]
Percentage of Net Assets at Fair Value	188.87%	[1],[2],[3],[4],[5],[6]	195.40%	[8],[9],[10],[11],[12],[13]
Cost	$ 1,484,078	[1],[2],[3],[4],[5],[6],[15],[16]	$ 1,476,703	[8],[9],[10],[11],[12],[13],[17],[18]
Northeast
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 349,599		$ 381,897
Percentage of Net Assets at Fair Value	45.00%		50.50%
Cost	$ 338,264		$ 370,566
West
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 347,834		$ 325,666
Percentage of Net Assets at Fair Value	44.80%		43.10%
Cost	$ 346,413		$ 322,616
Southeast
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 245,915		$ 231,842
Percentage of Net Assets at Fair Value	31.60%		30.70%
Cost	$ 257,364		$ 233,042
Midwest
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 244,393		$ 241,828
Percentage of Net Assets at Fair Value	31.40%		32.00%
Cost	$ 247,336		$ 243,971
Southwest
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 230,627		$ 247,526
Percentage of Net Assets at Fair Value	29.70%		32.80%
Cost	$ 247,176		$ 259,991
International
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 49,758		$ 47,802
Percentage of Net Assets at Fair Value	6.40%		6.30%
Cost	$ 47,525		$ 46,517
Healthcare Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 183,687		$ 188,373
Percentage of Net Assets at Fair Value	23.50%		24.90%
Cost	$ 194,518		$ 190,674
Media & Marketing
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 132,607		$ 153,302
Percentage of Net Assets at Fair Value	17.10%		20.30%
Cost	$ 127,485		$ 147,859
Food, Agriculture & Beverage
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 130,770		$ 93,384
Percentage of Net Assets at Fair Value	16.80%		12.40%
Cost	$ 139,833		$ 103,371
Consumer Products
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 117,704		$ 113,634
Percentage of Net Assets at Fair Value	15.10%		15.00%
Cost	$ 117,676		$ 114,347
Business Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 100,274		$ 104,936
Percentage of Net Assets at Fair Value	12.90%		13.90%
Cost	$ 101,014		$ 105,854
Consumer Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 96,423		$ 96,116
Percentage of Net Assets at Fair Value	12.40%		12.70%
Cost	$ 96,475		$ 94,046
Financial Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 81,253		$ 82,727
Percentage of Net Assets at Fair Value	10.60%		10.90%
Cost	$ 71,450		$ 73,945
Transportation & Logistics
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 67,819		$ 65,571
Percentage of Net Assets at Fair Value	8.70%		8.70%
Cost	$ 59,577		$ 58,090
Software & IT Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 62,063		$ 59,409
Percentage of Net Assets at Fair Value	8.00%		7.90%
Cost	$ 60,311		$ 57,702
Environmental Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 56,446		$ 56,807
Percentage of Net Assets at Fair Value	7.30%		7.50%
Cost	$ 55,698		$ 55,572
Industrial Products
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 43,406		$ 61,324
Percentage of Net Assets at Fair Value	5.60%		8.10%
Cost	$ 33,049		$ 50,276
Healthcare Equipment & Supplies
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 41,477		$ 41,377
Percentage of Net Assets at Fair Value	5.30%		5.50%
Cost	$ 41,413		$ 40,928
Industrial Machinery
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 39,452		$ 23,356
Percentage of Net Assets at Fair Value	5.10%		3.10%
Cost	$ 39,446		$ 23,174
Specialty Retail
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 38,710		$ 44,557
Percentage of Net Assets at Fair Value	5.00%		5.90%
Cost	$ 37,023		$ 42,855
Healthcare Products
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 31,891		$ 31,942
Percentage of Net Assets at Fair Value	4.10%		4.20%
Cost	$ 32,560		$ 32,978
Energy Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 27,927		$ 27,488
Percentage of Net Assets at Fair Value	3.60%		3.60%
Cost	$ 27,573		$ 27,131
Aerospace & Defense
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 26,685		$ 26,715
Percentage of Net Assets at Fair Value	3.40%		3.50%
Cost	$ 26,001		$ 25,995
Pharmaceuticals, Biotechnology & Life Sciences
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 26,330		$ 29,308
Percentage of Net Assets at Fair Value	3.40%		3.90%
Cost	$ 34,284		$ 34,304
Restaurants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 25,435		$ 25,556
Percentage of Net Assets at Fair Value	3.30%		3.40%
Cost	$ 25,512		$ 25,553
Telecommunications
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 19,193		$ 23,995
Percentage of Net Assets at Fair Value	2.50%		3.20%
Cost	$ 23,328		$ 28,313
Technology Products & Components
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 17,259		$ 18,969
Percentage of Net Assets at Fair Value	2.20%		2.50%
Cost	$ 13,236		$ 13,277
Building & Infrastructure Products
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 16,986		$ 7,727
Percentage of Net Assets at Fair Value	2.20%		1.00%
Cost	$ 16,210		$ 7,643
Distribution
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 15,698		$ 16,490
Percentage of Net Assets at Fair Value	2.00%		2.20%
Cost	$ 18,537		$ 18,620
Movies & Entertainment
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 15,622		$ 15,778
Percentage of Net Assets at Fair Value	2.00%		2.10%
Cost	$ 17,300		$ 16,576
Specialty Chemicals
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 14,413		$ 14,269
Percentage of Net Assets at Fair Value	1.90%		1.90%
Cost	$ 14,238		$ 14,222
Data Processing & Outsourced Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 14,261		$ 16,176
Percentage of Net Assets at Fair Value	1.80%		2.10%
Cost	$ 25,340		$ 25,426
Education
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 13,992		$ 14,627
Percentage of Net Assets at Fair Value	1.80%		1.90%
Cost	$ 24,862		$ 25,481
Industrial Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 10,343		$ 22,648
Percentage of Net Assets at Fair Value	1.30%		3.00%
Cost	$ 10,129		$ 22,491
First Lien Loans, Last Out
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	35,200		35,300
First Lien Loans, Split Lien Term Loans
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	42,800		43,700
Second Lien Loans, Split Lien Term Loans
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	20,600		20,700
Unsecured Convertible Notes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 300		$ 400
Percentage of Total Portfolio at Fair Value | Investment Type
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	100.00%		100.00%
Percentage of Total Portfolio at Fair Value | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	100.00%		100.00%
Percentage of Total Portfolio at Fair Value | Geographic
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	100.00%		100.00%
Percentage of Total Portfolio at Fair Value | Northeast | Geographic
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	23.80%		25.90%
Percentage of Total Portfolio at Fair Value | West | Geographic
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	23.70%		22.10%
Percentage of Total Portfolio at Fair Value | Southeast | Geographic
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	16.80%		15.70%
Percentage of Total Portfolio at Fair Value | Midwest | Geographic
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	16.60%		16.40%
Percentage of Total Portfolio at Fair Value | Southwest | Geographic
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	15.70%		16.70%
Percentage of Total Portfolio at Fair Value | International | Geographic
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	3.40%		3.20%
Percentage of Total Portfolio at Fair Value | Healthcare Services | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	12.50%		12.80%
Percentage of Total Portfolio at Fair Value | Media & Marketing | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	9.00%		10.40%
Percentage of Total Portfolio at Fair Value | Food, Agriculture & Beverage | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	8.90%		6.30%
Percentage of Total Portfolio at Fair Value | Consumer Products | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	8.00%		7.70%
Percentage of Total Portfolio at Fair Value | Business Services | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	6.80%		7.10%
Percentage of Total Portfolio at Fair Value | Consumer Services | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	6.60%		6.50%
Percentage of Total Portfolio at Fair Value | Financial Services | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	5.50%		5.60%
Percentage of Total Portfolio at Fair Value | Transportation & Logistics | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	4.60%		4.40%
Percentage of Total Portfolio at Fair Value | Software & IT Services | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	4.20%		4.00%
Percentage of Total Portfolio at Fair Value | Environmental Services | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	3.80%		3.80%
Percentage of Total Portfolio at Fair Value | Industrial Products | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	3.00%		4.20%
Percentage of Total Portfolio at Fair Value | Healthcare Equipment & Supplies | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	2.80%		2.80%
Percentage of Total Portfolio at Fair Value | Industrial Machinery | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	2.70%		1.60%
Percentage of Total Portfolio at Fair Value | Specialty Retail | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	2.60%		3.00%
Percentage of Total Portfolio at Fair Value | Healthcare Products | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	2.20%		2.20%
Percentage of Total Portfolio at Fair Value | Energy Services | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	1.90%		1.90%
Percentage of Total Portfolio at Fair Value | Aerospace & Defense | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	1.80%		1.80%
Percentage of Total Portfolio at Fair Value | Pharmaceuticals, Biotechnology & Life Sciences | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	1.80%		2.00%
Percentage of Total Portfolio at Fair Value | Restaurants | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	1.70%		1.70%
Percentage of Total Portfolio at Fair Value | Telecommunications | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	1.30%		1.60%
Percentage of Total Portfolio at Fair Value | Technology Products & Components | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	1.20%		1.30%
Percentage of Total Portfolio at Fair Value | Building & Infrastructure Products | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	1.20%		0.50%
Percentage of Total Portfolio at Fair Value | Distribution | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	1.10%		1.10%
Percentage of Total Portfolio at Fair Value | Movies & Entertainment | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	1.10%		1.10%
Percentage of Total Portfolio at Fair Value | Specialty Chemicals | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	1.00%		1.00%
Percentage of Total Portfolio at Fair Value | Data Processing & Outsourced Services | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	1.00%		1.10%
Percentage of Total Portfolio at Fair Value | Education | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	1.00%		1.00%
Percentage of Total Portfolio at Fair Value | Industrial Services | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	0.70%		1.50%
Percentage of Total Portfolio at Cost | Investment Type
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	100.00%		100.00%
Percentage of Total Portfolio at Cost | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	100.00%		100.00%
Percentage of Total Portfolio at Cost | Geographic
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	100.00%		100.00%
Percentage of Total Portfolio at Cost | Northeast | Geographic
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	22.80%		25.10%
Percentage of Total Portfolio at Cost | West | Geographic
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	23.30%		21.80%
Percentage of Total Portfolio at Cost | Southeast | Geographic
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	17.30%		15.80%
Percentage of Total Portfolio at Cost | Midwest | Geographic
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	16.70%		16.50%
Percentage of Total Portfolio at Cost | Southwest | Geographic
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	16.70%		17.60%
Percentage of Total Portfolio at Cost | International | Geographic
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	3.20%		3.20%
Percentage of Total Portfolio at Cost | Healthcare Services | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	13.10%		12.90%
Percentage of Total Portfolio at Cost | Media & Marketing | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	8.60%		10.00%
Percentage of Total Portfolio at Cost | Food, Agriculture & Beverage | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	9.40%		7.00%
Percentage of Total Portfolio at Cost | Consumer Products | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	7.90%		7.70%
Percentage of Total Portfolio at Cost | Business Services | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	6.80%		7.10%
Percentage of Total Portfolio at Cost | Consumer Services | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	6.50%		6.40%
Percentage of Total Portfolio at Cost | Financial Services | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	4.80%		5.00%
Percentage of Total Portfolio at Cost | Transportation & Logistics | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	4.00%		3.90%
Percentage of Total Portfolio at Cost | Software & IT Services | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	4.10%		3.90%
Percentage of Total Portfolio at Cost | Environmental Services | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	3.70%		3.80%
Percentage of Total Portfolio at Cost | Industrial Products | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	2.20%		3.40%
Percentage of Total Portfolio at Cost | Healthcare Equipment & Supplies | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	2.80%		2.80%
Percentage of Total Portfolio at Cost | Industrial Machinery | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	2.60%		1.60%
Percentage of Total Portfolio at Cost | Specialty Retail | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	2.50%		2.90%
Percentage of Total Portfolio at Cost | Healthcare Products | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	2.20%		2.20%
Percentage of Total Portfolio at Cost | Energy Services | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	1.90%		1.80%
Percentage of Total Portfolio at Cost | Aerospace & Defense | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	1.80%		1.80%
Percentage of Total Portfolio at Cost | Pharmaceuticals, Biotechnology & Life Sciences | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	2.30%		2.30%
Percentage of Total Portfolio at Cost | Restaurants | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	1.70%		1.70%
Percentage of Total Portfolio at Cost | Telecommunications | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	1.60%		2.00%
Percentage of Total Portfolio at Cost | Technology Products & Components | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	0.90%		0.90%
Percentage of Total Portfolio at Cost | Building & Infrastructure Products | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	1.10%		0.50%
Percentage of Total Portfolio at Cost | Distribution | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	1.20%		1.30%
Percentage of Total Portfolio at Cost | Movies & Entertainment | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	1.20%		1.10%
Percentage of Total Portfolio at Cost | Specialty Chemicals | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	1.00%		1.00%
Percentage of Total Portfolio at Cost | Data Processing & Outsourced Services | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	1.70%		1.70%
Percentage of Total Portfolio at Cost | Education | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	1.70%		1.70%
Percentage of Total Portfolio at Cost | Industrial Services | Industry
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	0.70%		1.50%
First lien loans
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 1,305,906		$ 1,309,449
Percentage of Net Assets at Fair Value	168.00%		173.30%
Cost	$ 1,344,782		$ 1,340,555
First lien loans | Percentage of Total Portfolio at Fair Value | Investment Type
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	88.90%		88.70%
First lien loans | Percentage of Total Portfolio at Cost | Investment Type
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	90.60%		90.80%
Second lien loans
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 28,093		$ 33,774
Percentage of Net Assets at Fair Value	3.60%		4.50%
Cost	$ 38,746		$ 41,654
Second lien loans | Percentage of Total Portfolio at Fair Value | Investment Type
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	1.90%		2.30%
Second lien loans | Percentage of Total Portfolio at Cost | Investment Type
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	2.60%		2.80%
Subordinated debt
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 1,280		$ 1,336
Percentage of Net Assets at Fair Value	0.20%		0.20%
Cost	$ 1,484		$ 1,007
Subordinated debt | Percentage of Total Portfolio at Fair Value | Investment Type
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	0.10%		0.10%
Subordinated debt | Percentage of Total Portfolio at Cost | Investment Type
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	0.10%		0.10%
Preferred equity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 72,886		$ 71,127
Percentage of Net Assets at Fair Value	9.40%		9.40%
Cost	$ 58,511		$ 56,708
Preferred equity | Percentage of Total Portfolio at Fair Value | Investment Type
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	5.00%		4.80%
Preferred equity | Percentage of Total Portfolio at Cost | Investment Type
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	4.00%		3.80%
Common equity & warrants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 59,961		$ 60,875
Percentage of Net Assets at Fair Value	7.70%		8.00%
Cost	$ 40,555		$ 36,779
Common equity & warrants | Percentage of Total Portfolio at Fair Value | Investment Type
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	4.10%		4.10%
Common equity & warrants | Percentage of Total Portfolio at Cost | Investment Type
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	2.70%		2.50%

[1] Equity ownership may be held in shares or units of a company that is either wholly owned by the portfolio company or under common control by the same parent company to the portfolio company.

[2] Unless otherwise noted, all portfolio company headquarters are based in the United States.

[3] Affiliate investments are generally defined by the 1940 Act as investments in which between 5% and 25% of the voting securities are owned and the investments are not classified as control investments. At June 30, 2024, the Company held $184.2 million of affiliate investments, which represented approximately 12.6% of the Company’s investment assets. The fair value of these investments as a percent of net assets is 23.7%.

[4] All debt investments are income-producing, unless otherwise noted. Equity investments are non-income producing, unless otherwise noted.

[5] Control investments are generally defined by the 1940 Act as investments in which more than 25% of the voting securities are owned. At June 30, 2024, the Company held $9.4 million of control investments, which represented approximately 0.6% of the Company's investment assets. The fair value of these investments as a percent of net assets is 1.2%.

[6] Non-Control/Non-Affiliate investments are generally defined by the 1940 Act, as investments that are neither control investments nor affiliate investments. At June 30, 2024, the Company held $1,274.6 million of non-control/non-affiliate investments, which represented approximately 86.8% of the Company’s investment assets. The fair value of these investments as a percent of net assets is 164.0%.

[7] The Company's investment portfolio is comprised entirely of debt and equity securities of privately held companies for which quoted prices falling within the categories of Level 1 and Level 2 inputs are not readily available. Therefore, the Company values all of its portfolio investments at fair value, as determined in good faith by the valuation committee comprised of certain officers of the Company (the "Valuation Committee") as the valuation designee of the Board of Directors (the "Valuation Designee") pursuant to Rule 2a-5 under the Investment Company Act of 1940, as amended (the “1940 Act”), using significant unobservable Level 3 inputs. Refer to Note 4 - Fair Value Measurements for further discussion.

[8] Equity ownership may be held in shares or units of a company that is either wholly owned by the portfolio company or under common control by the same parent company to the portfolio company.

[9] Unless otherwise noted, all portfolio company headquarters are based in the United States.

[10] Affiliate investments are generally defined by the 1940 Act as investments in which between 5% and 25% of the voting securities are owned and the investments are not classified as control investments. At March 31, 2024, the Company held $190.2 million of affiliate investments, which represented approximately 12.9% of the Company’s investment assets. The fair value of these investments as a percent of net assets is 25.2%.

[11] All debt investments are income-producing, unless otherwise noted. Equity investments are non-income producing, unless otherwise noted.

[12] Control investments are generally defined by the 1940 Act as investments in which more than 25% of the voting securities are owned. At March 31, 2024, the Company did not hold any control investments.

[13] Non-Control/Non-Affiliate investments are generally defined by the 1940 Act, as investments that are neither control investments nor affiliate investments. At March 31, 2024, the Company held $1,286.4 million of non-control/non-affiliate investments, which represented approximately 87.1% of the Company’s investment assets. The fair value of these investments as a percent of net assets is 170.2%.

[14] The Company's investment portfolio is comprised entirely of debt and equity securities of privately held companies for which quoted prices falling within the categories of Level 1 and Level 2 inputs are not readily available. Therefore, the Company values all of its portfolio investments at fair value, as determined in good faith by the valuation committee comprised of certain officers of the Company (the "Valuation Committee") as the valuation designee of the Board of Directors (the "Valuation Designee") pursuant to Rule 2a-5 under the Investment Company Act of 1940, as amended (the “1940 Act”), using significant unobservable Level 3 inputs. Refer to Note 4 - Fair Value Measurements for further discussion.

[15] As of June 30, 2024, the cumulative gross unrealized appreciation for U.S. federal income tax purposes was approximately $98.0 million; cumulative gross unrealized depreciation for federal income tax purposes was $111.3 million. Cumulative net unrealized depreciation was $13.3 million, based on a tax cost of $1,475.7 million.

[16] Negative cost in this column represents the original issue discount of certain undrawn revolvers and delayed draw term loans.

[17] As of March 31, 2024, the cumulative gross unrealized appreciation for U.S. federal income tax purposes was approximately $96.3 million; cumulative gross unrealized depreciation for federal income tax purposes was $96.4 million. Cumulative net unrealized depreciation was $0.1 million, based on a tax cost of $1,471.1 million.

[18] Negative cost in this column represents the original issue discount of certain undrawn revolvers and delayed draw term loans.