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INVESTMENTS - Investment Portfolio, at Fair Value and Cost (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 1,476,561 | [1],[2],[3],[4],[5],[6],[7] | $ 1,206,388 | [8],[9],[10]
Percentage of Net Assets at Fair Value | 195.40% | [1],[2],[3],[4],[5],[6] | 204.30% |
Cost | $ 1,476,703 | [1],[2],[3],[4],[5],[6],[11],[12] | $ 1,220,152 | [8],[9],[13],[14]
Northeast |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 381,897 |  | $ 269,569 |
Percentage of Net Assets at Fair Value | 50.50% |  | 45.70% |
Cost | $ 370,566 |  | $ 255,995 |
West |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 325,666 |  | $ 233,079 |
Percentage of Net Assets at Fair Value | 43.10% |  | 39.50% |
Cost | $ 322,616 |  | $ 232,109 |
Southwest |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 247,526 |  | $ 234,127 |
Percentage of Net Assets at Fair Value | 32.80% |  | 39.60% |
Cost | $ 259,991 |  | $ 231,467 |
Midwest |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 241,828 |  | $ 156,233 |
Percentage of Net Assets at Fair Value | 32.00% |  | 26.40% |
Cost | $ 243,971 |  | $ 158,989 |
Southeast |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 231,842 |  | $ 235,782 |
Percentage of Net Assets at Fair Value | 30.70% |  | 39.90% |
Cost | $ 233,042 |  | $ 236,333 |
I-45 SLF LLC |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value |  |  | $ 51,256 |
Percentage of Net Assets at Fair Value |  |  | 8.70% |
Cost |  |  | $ 80,800 |
International |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 47,802 |  | $ 26,342 |
Percentage of Net Assets at Fair Value | 6.30% |  | 4.50% |
Cost | $ 46,517 |  | $ 24,459 |
Healthcare Services |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 210,947 |  | $ 126,971 |
Percentage of Net Assets at Fair Value | 27.90% |  | 21.50% |
Cost | $ 221,937 |  | $ 143,455 |
Business Services |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 173,722 |  | $ 146,727 |
Percentage of Net Assets at Fair Value | 23.00% |  | 24.90% |
Cost | $ 183,650 |  | $ 147,056 |
Media & Marketing |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 169,080 |  | $ 149,357 |
Percentage of Net Assets at Fair Value | 22.40% |  | 25.30% |
Cost | $ 164,435 |  | $ 139,750 |
Consumer Products and Retail |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 158,825 |  | $ 86,385 |
Percentage of Net Assets at Fair Value | 21.00% |  | 14.60% |
Cost | $ 157,926 |  | $ 86,607 |
Consumer Services |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 114,459 |  | $ 91,913 |
Percentage of Net Assets at Fair Value | 15.10% |  | 15.60% |
Cost | $ 119,512 |  | $ 91,142 |
Food, Agriculture & Beverage |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 93,384 |  | $ 68,833 |
Percentage of Net Assets at Fair Value | 12.40% |  | 11.70% |
Cost | $ 103,371 |  | $ 73,223 |
Healthcare Products |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 87,378 |  | $ 66,355 |
Percentage of Net Assets at Fair Value | 11.60% |  | 11.20% |
Cost | $ 84,177 |  | $ 67,555 |
Financial Services |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 64,384 |  | $ 40,420 |
Percentage of Net Assets at Fair Value | 8.50% |  | 6.80% |
Cost | $ 48,479 |  | $ 30,950 |
Environmental Services |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 58,322 |  | $ 29,753 |
Percentage of Net Assets at Fair Value | 7.70% |  | 5.00% |
Cost | $ 57,116 |  | $ 34,869 |
Transportation & Logistics |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 57,612 |  | $ 48,494 |
Percentage of Net Assets at Fair Value | 7.60% |  | 8.20% |
Cost | $ 50,136 |  | $ 42,049 |
Industrial Products |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 52,148 |  | $ 32,518 |
Percentage of Net Assets at Fair Value | 6.90% |  | 5.50% |
Cost | $ 39,614 |  | $ 25,827 |
Software & IT Services |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 37,882 |  | $ 47,641 |
Percentage of Net Assets at Fair Value | 5.00% |  | 8.10% |
Cost | $ 36,149 |  | $ 47,563 |
Aerospace & Defense |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 26,715 |  | $ 6,000 |
Percentage of Net Assets at Fair Value | 3.50% |  | 1.00% |
Cost | $ 25,995 |  | $ 5,898 |
Restaurants |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 25,556 |  |  |
Percentage of Net Assets at Fair Value | 3.40% |  |  |
Cost | $ 25,553 |  |  |
Telecommunications |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 23,995 |  | $ 17,386 |
Percentage of Net Assets at Fair Value | 3.20% |  | 2.90% |
Cost | $ 28,313 |  | $ 21,796 |
Industrial Services |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 22,648 |  | $ 25,460 |
Percentage of Net Assets at Fair Value | 3.00% |  | 4.30% |
Cost | $ 22,491 |  | $ 24,920 |
Technology Products & Components |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 18,969 |  | $ 59,718 |
Percentage of Net Assets at Fair Value | 2.50% |  | 10.10% |
Cost | $ 13,277 |  | $ 43,016 |
I-45 SLF LLC |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value |  |  | $ 51,256 |
Percentage of Net Assets at Fair Value |  |  | 8.70% |
Cost |  |  | $ 80,800 |
Distribution |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 16,490 |  | $ 16,315 |
Percentage of Net Assets at Fair Value | 2.20% |  | 2.80% |
Cost | $ 18,620 |  | $ 18,755 |
Education |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 14,627 |  | $ 26,357 |
Percentage of Net Assets at Fair Value | 1.90% |  | 4.50% |
Cost | $ 25,481 |  | $ 25,995 |
Specialty Chemicals |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 14,269 |  | $ 17,839 |
Percentage of Net Assets at Fair Value | 1.90% |  | 3.00% |
Cost | $ 14,222 |  | $ 17,531 |
Energy Services (Midstream) |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 13,432 |  | $ 22,829 |
Percentage of Net Assets at Fair Value | 1.80% |  | 3.90% |
Cost | $ 13,232 |  | $ 23,337 |
Energy Services (Upstream) |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 12,541 |  | $ 17,730 |
Percentage of Net Assets at Fair Value | 1.70% |  | 3.00% |
Cost | $ 12,355 |  | $ 17,402 |
Containers & Packaging |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 9,176 |  | $ 10,131 |
Percentage of Net Assets at Fair Value | 1.20% |  | 1.70% |
Cost | $ 10,662 |  | $ 10,656 |
First lien last out loans |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | 35,300 |  | 50,100 |
Split lien term loans included in first lien loans |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | 43,700 |  | 45,000 |
Split lien term loans included in second lien loans |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | 20,700 |  | 20,200 |
Unsecured convertible Note |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 400 |  | $ 400 |
Percentage of Total Portfolio at Fair Value | Investment Type |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 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 | 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 | 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 | 25.90% |  | 22.30% |
Percentage of Total Portfolio at Fair Value | West | Geographic |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 22.10% |  | 19.30% |
Percentage of Total Portfolio at Fair Value | Southwest | Geographic |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 16.70% |  | 19.40% |
Percentage of Total Portfolio at Fair Value | Midwest | Geographic |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 16.40% |  | 13.10% |
Percentage of Total Portfolio at Fair Value | Southeast | Geographic |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 15.70% |  | 19.50% |
Percentage of Total Portfolio at Fair Value | I-45 SLF LLC | Geographic |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio |  |  | 4.20% |
Percentage of Total Portfolio at Fair Value | International | Geographic |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 3.20% |  | 2.20% |
Percentage of Total Portfolio at Fair Value | Healthcare Services | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 14.30% |  | 10.50% |
Percentage of Total Portfolio at Fair Value | Business Services | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 11.80% |  | 12.20% |
Percentage of Total Portfolio at Fair Value | Media & Marketing | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 11.50% |  | 12.40% |
Percentage of Total Portfolio at Fair Value | Consumer Products and Retail | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 10.80% |  | 7.20% |
Percentage of Total Portfolio at Fair Value | Consumer Services | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 7.80% |  | 7.60% |
Percentage of Total Portfolio at Fair Value | Food, Agriculture & Beverage | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 6.30% |  | 5.70% |
Percentage of Total Portfolio at Fair Value | Healthcare Products | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 5.90% |  | 5.50% |
Percentage of Total Portfolio at Fair Value | Financial Services | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 4.40% |  | 3.30% |
Percentage of Total Portfolio at Fair Value | Environmental Services | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 3.90% |  | 2.50% |
Percentage of Total Portfolio at Fair Value | Transportation & Logistics | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 3.90% |  | 4.00% |
Percentage of Total Portfolio at Fair Value | Industrial Products | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 3.50% |  | 2.70% |
Percentage of Total Portfolio at Fair Value | Software & IT Services | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 2.60% |  | 3.90% |
Percentage of Total Portfolio at Fair Value | Aerospace & Defense | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 1.80% |  | 0.50% |
Percentage of Total Portfolio at Fair Value | Restaurants | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 1.70% |  |  |
Percentage of Total Portfolio at Fair Value | Telecommunications | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 1.60% |  | 1.40% |
Percentage of Total Portfolio at Fair Value | Industrial Services | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 1.50% |  | 2.10% |
Percentage of Total Portfolio at Fair Value | Technology Products & Components | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 1.30% |  | 5.00% |
Percentage of Total Portfolio at Fair Value | I-45 SLF LLC | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio |  |  | 4.20% |
Percentage of Total Portfolio at Fair Value | Distribution | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 1.10% |  | 1.40% |
Percentage of Total Portfolio at Fair Value | Education | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 1.00% |  | 2.20% |
Percentage of Total Portfolio at Fair Value | Specialty Chemicals | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 1.00% |  | 1.50% |
Percentage of Total Portfolio at Fair Value | Energy Services (Midstream) | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 0.90% |  | 1.90% |
Percentage of Total Portfolio at Fair Value | Energy Services (Upstream) | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 0.80% |  | 1.50% |
Percentage of Total Portfolio at Fair Value | Containers & Packaging | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 0.60% |  | 0.80% |
Percentage of Total Portfolio at Cost | Investment Type |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 100.00% |  | 100.00% |
Percentage of Total Portfolio at Cost | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 100.00% |  | 100.00% |
Percentage of Total Portfolio at Cost | Geographic |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 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 | 25.10% |  | 21.00% |
Percentage of Total Portfolio at Cost | West | Geographic |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 21.80% |  | 19.00% |
Percentage of Total Portfolio at Cost | Southwest | Geographic |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 17.60% |  | 19.00% |
Percentage of Total Portfolio at Cost | Midwest | Geographic |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 16.50% |  | 13.00% |
Percentage of Total Portfolio at Cost | Southeast | Geographic |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 15.80% |  | 19.40% |
Percentage of Total Portfolio at Cost | I-45 SLF LLC | Geographic |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio |  |  | 6.60% |
Percentage of Total Portfolio at Cost | International | Geographic |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 3.20% |  | 2.00% |
Percentage of Total Portfolio at Cost | Healthcare Services | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 15.00% |  | 11.80% |
Percentage of Total Portfolio at Cost | Business Services | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 12.40% |  | 12.10% |
Percentage of Total Portfolio at Cost | Media & Marketing | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 11.10% |  | 11.50% |
Percentage of Total Portfolio at Cost | Consumer Products and Retail | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 10.70% |  | 7.10% |
Percentage of Total Portfolio at Cost | Consumer Services | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 8.10% |  | 7.50% |
Percentage of Total Portfolio at Cost | Food, Agriculture & Beverage | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 7.00% |  | 6.00% |
Percentage of Total Portfolio at Cost | Healthcare Products | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 5.70% |  | 5.50% |
Percentage of Total Portfolio at Cost | Financial Services | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 3.30% |  | 2.50% |
Percentage of Total Portfolio at Cost | Environmental Services | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 3.90% |  | 2.90% |
Percentage of Total Portfolio at Cost | Transportation & Logistics | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 3.40% |  | 3.40% |
Percentage of Total Portfolio at Cost | Industrial Products | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 2.70% |  | 2.10% |
Percentage of Total Portfolio at Cost | Software & IT Services | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 2.40% |  | 3.90% |
Percentage of Total Portfolio at Cost | Aerospace & Defense | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 1.80% |  | 0.50% |
Percentage of Total Portfolio at Cost | Restaurants | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 1.70% |  |  |
Percentage of Total Portfolio at Cost | Telecommunications | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 2.00% |  | 1.90% |
Percentage of Total Portfolio at Cost | Industrial Services | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 1.50% |  | 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 | 0.90% |  | 3.50% |
Percentage of Total Portfolio at Cost | I-45 SLF LLC | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio |  |  | 6.60% |
Percentage of Total Portfolio at Cost | Distribution | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 1.30% |  | 1.50% |
Percentage of Total Portfolio at Cost | Education | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 1.70% |  | 2.10% |
Percentage of Total Portfolio at Cost | Specialty Chemicals | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 1.00% |  | 1.40% |
Percentage of Total Portfolio at Cost | Energy Services (Midstream) | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 0.90% |  | 1.90% |
Percentage of Total Portfolio at Cost | Energy Services (Upstream) | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 0.80% |  | 1.40% |
Percentage of Total Portfolio at Cost | Containers & Packaging | Industry |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 0.70% |  | 0.90% |
First lien loans |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 1,309,449 |  | $ 1,000,984 |
Percentage of Net Assets at Fair Value | 173.30% |  | 169.50% |
Cost | $ 1,340,555 |  | $ 1,018,595 |
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 | 88.70% |  | 83.00% |
First lien loans | Percentage of Total Portfolio at Cost | Investment Type |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 90.80% |  | 83.50% |
Second lien loans |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 33,774 |  | $ 35,820 |
Percentage of Net Assets at Fair Value | 4.50% |  | 6.10% |
Cost | $ 41,654 |  | $ 44,038 |
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 | 2.30% |  | 3.00% |
Second lien loans | Percentage of Total Portfolio at Cost | Investment Type |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 2.80% |  | 3.60% |
Subordinated debt |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 1,336 |  | $ 791 |
Percentage of Net Assets at Fair Value | 0.20% |  | 0.10% |
Cost | $ 1,007 |  | $ 763 |
Subordinated debt | Percentage of Total Portfolio at Fair Value | Investment Type |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 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 | 0.10% |  | 0.10% |
Preferred equity |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 71,127 |  | $ 63,393 |
Percentage of Net Assets at Fair Value | 9.40% |  | 10.70% |
Cost | $ 56,708 |  | $ 43,634 |
Preferred equity | Percentage of Total Portfolio at Fair Value | Investment Type |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 4.80% |  | 5.20% |
Preferred equity | Percentage of Total Portfolio at Cost | Investment Type |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 3.80% |  | 3.60% |
Common equity & warrants |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value | $ 60,875 |  | $ 54,144 |
Percentage of Net Assets at Fair Value | 8.00% |  | 9.20% |
Cost | $ 36,779 |  | $ 32,322 |
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 | 4.10% |  | 4.50% |
Common equity & warrants | Percentage of Total Portfolio at Cost | Investment Type |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio | 2.50% |  | 2.60% |
I-45 SLF LLC |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Fair Value |  |  | $ 51,256 |
Percentage of Net Assets at Fair Value |  |  | 8.70% |
Cost |  |  | $ 80,800 |
I-45 SLF LLC | Percentage of Total Portfolio at Fair Value | Investment Type |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio |  |  | 4.20% |
I-45 SLF LLC | Percentage of Total Portfolio at Cost | Investment Type |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |
Percentage of Total Portfolio |  |  | 6.60% |
[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 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%.
[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 March 31, 2024, the Company did not hold any control investments.
[6] | 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%.
[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] | All debt investments are income-producing, unless otherwise noted. Equity investments are non-income producing, unless otherwise noted.
[10] | 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 Board of Directors, using significant unobservable Level 3 inputs. Refer to Note 4 - Fair Value Measurements to our audited consolidated financial statements for further discussion.
[11] | 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.
[12] | Negative cost in this column represents the original issue discount of certain undrawn revolvers and delayed draw term loans.
[13] | As of March 31, 2023, the cumulative gross unrealized appreciation for U.S. federal income tax purposes was approximately $72.3 million; cumulative gross unrealized depreciation for federal income tax purposes was $76.8 million. Cumulative net unrealized depreciation was $4.5 million, based on a tax cost of $1,210.8 million.
[14] | Negative cost in this column represents the original issue discount of certain undrawn revolvers and delayed draw term loans.

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