INVESTMENTS (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Sep. 30, 2024		Mar. 31, 2024
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 1,508,507	[1],[2],[3],[4],[5],[6],[7]	$ 1,476,561	[8],[9],[10],[11],[12],[13],[14]
Percentage of Net Assets at Fair Value	190.65%	[1],[2],[3],[4],[5],[6]	195.40%	[8],[9],[10],[11],[12],[13]
Cost	$ 1,522,664	[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	$ 361,935		$ 381,897
Percentage of Net Assets at Fair Value	45.70%		50.50%
Cost	$ 349,600		$ 370,566
West
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 317,125		$ 325,666
Percentage of Net Assets at Fair Value	40.10%		43.10%
Cost	$ 318,731		$ 322,616
Southeast
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 289,067		$ 231,842
Percentage of Net Assets at Fair Value	36.50%		30.70%
Cost	$ 305,222		$ 233,042
Midwest
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 246,835		$ 241,828
Percentage of Net Assets at Fair Value	31.20%		32.00%
Cost	$ 253,767		$ 243,971
Southwest
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 242,016		$ 247,526
Percentage of Net Assets at Fair Value	30.60%		32.80%
Cost	$ 247,201		$ 259,991
International
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 51,529		$ 47,802
Percentage of Net Assets at Fair Value	6.50%		6.30%
Cost	$ 48,143		$ 46,517
Healthcare Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 193,959		$ 188,373
Percentage of Net Assets at Fair Value	24.50%		24.90%
Cost	$ 205,470		$ 190,674
Food, Agriculture & Beverage
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 131,238		$ 93,384
Percentage of Net Assets at Fair Value	16.60%		12.40%
Cost	$ 141,807		$ 103,371
Consumer Products
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 123,145		$ 113,634
Percentage of Net Assets at Fair Value	15.50%		15.00%
Cost	$ 123,867		$ 114,347
Consumer Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 110,500		$ 96,116
Percentage of Net Assets at Fair Value	14.00%		12.70%
Cost	$ 111,804		$ 94,046
Financial Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 106,862		$ 82,727
Percentage of Net Assets at Fair Value	13.50%		10.90%
Cost	$ 95,934		$ 73,945
Media & Marketing
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 105,715		$ 153,302
Percentage of Net Assets at Fair Value	13.40%		20.30%
Cost	$ 98,929		$ 147,859
Business Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 99,385		$ 104,936
Percentage of Net Assets at Fair Value	12.50%		13.90%
Cost	$ 100,667		$ 105,854
Transportation & Logistics
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 73,439		$ 65,571
Percentage of Net Assets at Fair Value	9.30%		8.70%
Cost	$ 60,944		$ 58,090
Software & IT Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 61,583		$ 59,409
Percentage of Net Assets at Fair Value	7.80%		7.90%
Cost	$ 60,445		$ 57,702
Environmental Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 56,886		$ 56,807
Percentage of Net Assets at Fair Value	7.20%		7.50%
Cost	$ 56,121		$ 55,572
Healthcare Equipment & Supplies
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 49,815		$ 41,377
Percentage of Net Assets at Fair Value	6.30%		5.50%
Cost	$ 49,885		$ 40,928
Industrial Machinery
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 47,924		$ 23,356
Percentage of Net Assets at Fair Value	6.10%		3.10%
Cost	$ 47,334		$ 23,174
Industrial Products
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 42,141		$ 61,324
Percentage of Net Assets at Fair Value	5.30%		8.10%
Cost	$ 32,245		$ 50,276
Specialty Retail
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 39,417		$ 44,557
Percentage of Net Assets at Fair Value	5.00%		5.90%
Cost	$ 37,965		$ 42,855
Healthcare Products
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 30,983		$ 31,942
Percentage of Net Assets at Fair Value	3.90%		4.20%
Cost	$ 32,145		$ 32,978
Energy Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 28,334		$ 27,488
Percentage of Net Assets at Fair Value	3.60%		3.60%
Cost	$ 28,015		$ 27,131
Pharmaceuticals, Biotechnology & Life Sciences
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 26,844		$ 29,308
Percentage of Net Assets at Fair Value	3.40%		3.90%
Cost	$ 34,256		$ 34,304
Restaurants
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 25,310		$ 25,556
Percentage of Net Assets at Fair Value	3.20%		3.40%
Cost	$ 25,408		$ 25,553
Aerospace & Defense
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 25,064		$ 26,715
Percentage of Net Assets at Fair Value	3.20%		3.50%
Cost	$ 24,443		$ 25,995
Industrial Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 20,117		$ 22,648
Percentage of Net Assets at Fair Value	2.50%		3.00%
Cost	$ 19,913		$ 22,491
Telecommunications
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 19,065		$ 23,995
Percentage of Net Assets at Fair Value	2.40%		3.20%
Cost	$ 23,379		$ 28,313
Building & Infrastructure Products
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 16,883		$ 7,727
Percentage of Net Assets at Fair Value	2.10%		1.00%
Cost	$ 16,126		$ 7,643
Distribution
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 13,602		$ 16,490
Percentage of Net Assets at Fair Value	1.70%		2.20%
Cost	$ 18,537		$ 18,620
Education
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 13,466		$ 14,627
Percentage of Net Assets at Fair Value	1.70%		1.90%
Cost	$ 24,168		$ 25,481
Technology Products & Components
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 13,000		$ 18,969
Percentage of Net Assets at Fair Value	1.60%		2.50%
Cost	$ 13,194		$ 13,277
Movies & Entertainment
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 11,734		$ 15,778
Percentage of Net Assets at Fair Value	1.50%		2.10%
Cost	$ 17,300		$ 16,576
Data Processing & Outsourced Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 11,566		$ 16,176
Percentage of Net Assets at Fair Value	1.50%		2.10%
Cost	$ 11,920		$ 25,426
Commercial Services & Supplies
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 10,530
Percentage of Net Assets at Fair Value	1.30%
Cost	$ 10,443
Specialty Chemicals
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value			$ 14,269
Percentage of Net Assets at Fair Value			1.90%
Cost			$ 14,222
First Lien Loans, Last Out
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	34,400		35,300
First Lien Loans, Split Lien Term Loans
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	49,200		43,700
Second Lien Loans, Split Lien Term Loans
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	20,300		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 | Industry | Healthcare Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	12.90%		12.80%
Percentage of Total Portfolio at Fair Value | Industry | Food, Agriculture & Beverage
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	8.70%		6.30%
Percentage of Total Portfolio at Fair Value | Industry | Consumer Products
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	8.20%		7.70%
Percentage of Total Portfolio at Fair Value | Industry | Consumer Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	7.30%		6.50%
Percentage of Total Portfolio at Fair Value | Industry | Financial Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	7.00%		5.60%
Percentage of Total Portfolio at Fair Value | Industry | Media & Marketing
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	7.00%		10.40%
Percentage of Total Portfolio at Fair Value | Industry | Business Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	6.60%		7.10%
Percentage of Total Portfolio at Fair Value | Industry | Transportation & Logistics
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	4.90%		4.40%
Percentage of Total Portfolio at Fair Value | Industry | Software & IT Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	4.10%		4.00%
Percentage of Total Portfolio at Fair Value | Industry | Environmental Services
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 Fair Value | Industry | Healthcare Equipment & Supplies
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	3.30%		2.80%
Percentage of Total Portfolio at Fair Value | Industry | Industrial Machinery
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	3.20%		1.60%
Percentage of Total Portfolio at Fair Value | Industry | Industrial Products
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	2.80%		4.20%
Percentage of Total Portfolio at Fair Value | Industry | Specialty Retail
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 | Industry | Healthcare Products
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	2.10%		2.20%
Percentage of Total Portfolio at Fair Value | Industry | Energy Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	1.80%		1.90%
Percentage of Total Portfolio at Fair Value | Industry | Pharmaceuticals, Biotechnology & Life Sciences
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	1.70%		2.00%
Percentage of Total Portfolio at Fair Value | Industry | Restaurants
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 | Industry | Aerospace & Defense
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	1.70%		1.80%
Percentage of Total Portfolio at Fair Value | Industry | Industrial Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	1.30%		1.50%
Percentage of Total Portfolio at Fair Value | Industry | Telecommunications
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 | Industry | Building & Infrastructure Products
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 Fair Value | Industry | Distribution
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	0.90%		1.10%
Percentage of Total Portfolio at Fair Value | Industry | Education
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	0.90%		1.00%
Percentage of Total Portfolio at Fair Value | Industry | Technology Products & Components
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	0.90%		1.30%
Percentage of Total Portfolio at Fair Value | Industry | Movies & Entertainment
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	0.80%		1.10%
Percentage of Total Portfolio at Fair Value | Industry | Data Processing & Outsourced Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	0.80%		1.10%
Percentage of Total Portfolio at Fair Value | Industry | Commercial Services & Supplies
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	0.70%
Percentage of Total Portfolio at Fair Value | Industry | Specialty Chemicals
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value			1.00%
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 | Geographic | Northeast
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	24.00%		25.90%
Percentage of Total Portfolio at Fair Value | Geographic | West
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	21.00%		22.10%
Percentage of Total Portfolio at Fair Value | Geographic | Southeast
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	19.20%		15.70%
Percentage of Total Portfolio at Fair Value | Geographic | Midwest
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	16.40%		16.40%
Percentage of Total Portfolio at Fair Value | Geographic | Southwest
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	16.00%		16.70%
Percentage of Total Portfolio at Fair Value | Geographic | International
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 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 | Industry | Healthcare Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	13.50%		12.90%
Percentage of Total Portfolio at Cost | Industry | Food, Agriculture & Beverage
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	9.30%		7.00%
Percentage of Total Portfolio at Cost | Industry | Consumer Products
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	8.10%		7.70%
Percentage of Total Portfolio at Cost | Industry | Consumer Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	7.40%		6.40%
Percentage of Total Portfolio at Cost | Industry | Financial Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	6.30%		5.00%
Percentage of Total Portfolio at Cost | Industry | Media & Marketing
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	6.50%		10.00%
Percentage of Total Portfolio at Cost | Industry | Business Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	6.60%		7.10%
Percentage of Total Portfolio at Cost | Industry | Transportation & Logistics
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 | Industry | Software & IT Services
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 | Industry | Environmental Services
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 | Industry | Healthcare Equipment & Supplies
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	3.30%		2.80%
Percentage of Total Portfolio at Cost | Industry | Industrial Machinery
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	3.10%		1.60%
Percentage of Total Portfolio at Cost | Industry | Industrial Products
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	2.10%		3.40%
Percentage of Total Portfolio at Cost | Industry | Specialty Retail
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 | Industry | Healthcare Products
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	2.10%		2.20%
Percentage of Total Portfolio at Cost | Industry | Energy Services
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 | Industry | Pharmaceuticals, Biotechnology & Life Sciences
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	2.20%		2.30%
Percentage of Total Portfolio at Cost | Industry | Restaurants
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 | Industry | Aerospace & Defense
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	1.60%		1.80%
Percentage of Total Portfolio at Cost | Industry | Industrial Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	1.30%		1.50%
Percentage of Total Portfolio at Cost | Industry | Telecommunications
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	1.50%		2.00%
Percentage of Total Portfolio at Cost | Industry | Building & Infrastructure Products
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 | Industry | Distribution
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 | Industry | Education
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	1.60%		1.70%
Percentage of Total Portfolio at Cost | Industry | Technology Products & Components
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 | Industry | Movies & Entertainment
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 Cost | Industry | Data Processing & Outsourced Services
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	0.80%		1.70%
Percentage of Total Portfolio at Cost | Industry | Commercial Services & Supplies
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	0.70%
Percentage of Total Portfolio at Cost | Industry | Specialty Chemicals
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value			1.00%
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 | Geographic | Northeast
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	23.00%		25.10%
Percentage of Total Portfolio at Cost | Geographic | West
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	20.90%		21.80%
Percentage of Total Portfolio at Cost | Geographic | Southeast
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	20.00%		15.80%
Percentage of Total Portfolio at Cost | Geographic | Midwest
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 | Geographic | Southwest
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	16.20%		17.60%
Percentage of Total Portfolio at Cost | Geographic | International
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percentage of Total Portfolio at Fair Value	3.20%		3.20%
First lien loans
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 1,345,389		$ 1,309,449
Percentage of Net Assets at Fair Value	170.00%		173.30%
Cost	$ 1,390,973		$ 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	89.20%		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	91.30%		90.80%
Second lien loans
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value	$ 27,372		$ 33,774
Percentage of Net Assets at Fair Value	3.40%		4.50%
Cost	$ 28,261		$ 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	1.80%		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	1.90%		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	$ 1,486		$ 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	$ 74,552		$ 71,127
Percentage of Net Assets at Fair Value	9.40%		9.40%
Cost	$ 60,266		$ 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	4.90%		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	$ 59,914		$ 60,875
Percentage of Net Assets at Fair Value	7.60%		8.00%
Cost	$ 41,678		$ 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	4.00%		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 September 30, 2024, the Company held $201.9 million of affiliate investments, which represented approximately 13.4% of the Company’s investment assets. The fair value of these investments as a percent of net assets is 25.5%.

[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 September 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 September 30, 2024, the Company held $1,297.3 million of non-control/non-affiliate investments, which represented approximately 86.0% of the Company’s investment assets. The fair value of these investments as a percent of net assets is 163.9%.

[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 September 30, 2024, the cumulative gross unrealized appreciation for U.S. federal income tax purposes was approximately $96.0 million; cumulative gross unrealized depreciation for federal income tax purposes was $125.6 million. Cumulative net unrealized depreciation was $29.6 million, based on a tax cost of $1,538.1 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.