Annual report [Section 13 and 15(d), not S-K Item 405]

INVESTMENTS - Summary Investment Holdings (Details)

v3.25.1
INVESTMENTS - Summary Investment Holdings (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Summary of Investment Holdings [Line Items]    
Cost $ 939,066 [1] $ 854,290 [2]
Fair Value $ 979,320 [1] $ 920,504 [2]
Investment Owned, At Cost | Investment Type Concentration Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 100.00% 100.00%
Investment Owned, At Fair Value | Investment Type Concentration Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 100.00% 100.00%
Investment Owned, At Fair Value | Industry Concentration Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 100.00% 100.00%
Investment Owned, At Fair Value | Geographic Regions Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 100.00% 100.00%
South    
Summary of Investment Holdings [Line Items]    
Fair Value $ 317,294 $ 346,838
South | Investment Owned, At Fair Value | Geographic Regions Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 32.40% 37.70%
Midwest    
Summary of Investment Holdings [Line Items]    
Fair Value $ 227,415 $ 141,925
Midwest | Investment Owned, At Fair Value | Geographic Regions Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 23.20% 15.40%
West    
Summary of Investment Holdings [Line Items]    
Fair Value $ 222,062 $ 223,871
West | Investment Owned, At Fair Value | Geographic Regions Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 22.70% 24.30%
Northeast    
Summary of Investment Holdings [Line Items]    
Fair Value $ 182,669 $ 207,870
Northeast | Investment Owned, At Fair Value | Geographic Regions Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 18.70% 22.60%
Canada    
Summary of Investment Holdings [Line Items]    
Fair Value $ 29,880 $ 0
Canada | Investment Owned, At Fair Value | Geographic Regions Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 3.00% 0.00%
Diversified/Conglomerate Services    
Summary of Investment Holdings [Line Items]    
Fair Value $ 170,360 $ 264,535
Diversified/Conglomerate Services | Investment Owned, At Fair Value | Industry Concentration Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 17.40% 28.70%
Home and Office Furnishings, Housewares, and Durable Consumer Products    
Summary of Investment Holdings [Line Items]    
Fair Value $ 159,236 $ 160,038
Home and Office Furnishings, Housewares, and Durable Consumer Products | Investment Owned, At Fair Value | Industry Concentration Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 16.30% 17.30%
Aerospace and Defense    
Summary of Investment Holdings [Line Items]    
Fair Value $ 107,869 $ 29,064
Aerospace and Defense | Investment Owned, At Fair Value | Industry Concentration Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 10.90% 3.20%
Machinery (Non-Agriculture, Non-Construction, and Non-Electronic)    
Summary of Investment Holdings [Line Items]    
Fair Value $ 105,432 $ 92,781
Machinery (Non-Agriculture, Non-Construction, and Non-Electronic) | Investment Owned, At Fair Value | Industry Concentration Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 10.80% 10.10%
Leisure, Amusement, Motion Pictures, and Entertainment    
Summary of Investment Holdings [Line Items]    
Fair Value $ 78,460 $ 39,350
Leisure, Amusement, Motion Pictures, and Entertainment | Investment Owned, At Fair Value | Industry Concentration Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 8.00% 4.30%
Electronics    
Summary of Investment Holdings [Line Items]    
Fair Value $ 71,573 $ 0
Electronics | Investment Owned, At Fair Value | Industry Concentration Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 7.20% 0.00%
Oil and Gas    
Summary of Investment Holdings [Line Items]    
Fair Value $ 69,589 $ 51,171
Oil and Gas | Investment Owned, At Fair Value | Industry Concentration Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 7.10% 5.60%
Buildings and Real Estate    
Summary of Investment Holdings [Line Items]    
Fair Value $ 69,320 $ 60,431
Buildings and Real Estate | Investment Owned, At Fair Value | Industry Concentration Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 7.10% 6.60%
Healthcare, Education, and Childcare    
Summary of Investment Holdings [Line Items]    
Fair Value $ 51,501 $ 49,638
Healthcare, Education, and Childcare | Investment Owned, At Fair Value | Industry Concentration Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 5.30% 5.40%
Mining, Steel, Iron and Non-Precious Metals    
Summary of Investment Holdings [Line Items]    
Fair Value $ 41,010 $ 30,537
Mining, Steel, Iron and Non-Precious Metals | Investment Owned, At Fair Value | Industry Concentration Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 4.20% 3.30%
Cargo Transport    
Summary of Investment Holdings [Line Items]    
Fair Value $ 12,624 $ 13,500
Cargo Transport | Investment Owned, At Fair Value | Industry Concentration Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 1.30% 1.50%
Printing and Publishing    
Summary of Investment Holdings [Line Items]    
Fair Value $ 11,681 $ 14,238
Printing and Publishing | Investment Owned, At Fair Value | Industry Concentration Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 1.20% 1.50%
Chemicals, Plastics, and Rubber    
Summary of Investment Holdings [Line Items]    
Fair Value $ 11,612 $ 20,363
Chemicals, Plastics, and Rubber | Investment Owned, At Fair Value | Industry Concentration Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 1.20% 2.20%
Hotels, Motels, Inns, and Gaming    
Summary of Investment Holdings [Line Items]    
Fair Value $ 0 $ 77,366
Hotels, Motels, Inns, and Gaming | Investment Owned, At Fair Value | Industry Concentration Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 0.00% 8.40%
Other less than 2.0%    
Summary of Investment Holdings [Line Items]    
Fair Value $ 19,053 $ 17,492
Other less than 2.0% | Investment Owned, At Fair Value | Industry Concentration Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 2.00% 1.90%
Total debt    
Summary of Investment Holdings [Line Items]    
Cost $ 687,982 $ 658,383
Fair Value $ 617,914 $ 613,559
Total debt | Investment Owned, At Cost | Investment Type Concentration Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 73.30% 77.00%
Total debt | Investment Owned, At Fair Value | Investment Type Concentration Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 63.10% 66.60%
Secured First Lien Debt    
Summary of Investment Holdings [Line Items]    
Cost $ 584,026 $ 513,425
Fair Value $ 514,334 $ 474,856
Secured First Lien Debt | Investment Owned, At Cost | Investment Type Concentration Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 62.20% 60.10%
Secured First Lien Debt | Investment Owned, At Fair Value | Investment Type Concentration Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 52.50% 51.60%
Secured Second Lien Debt    
Summary of Investment Holdings [Line Items]    
Cost $ 103,956 $ 144,958
Fair Value $ 103,580 $ 138,703
Secured Second Lien Debt | Investment Owned, At Cost | Investment Type Concentration Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 11.10% 16.90%
Secured Second Lien Debt | Investment Owned, At Fair Value | Investment Type Concentration Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 10.60% 15.00%
Total equity/equivalents    
Summary of Investment Holdings [Line Items]    
Cost $ 251,084 $ 195,907
Fair Value $ 361,406 $ 306,945
Total equity/equivalents | Investment Owned, At Cost | Investment Type Concentration Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 26.70% 23.00%
Total equity/equivalents | Investment Owned, At Fair Value | Investment Type Concentration Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 36.90% 33.40%
Preferred Equity    
Summary of Investment Holdings [Line Items]    
Cost $ 201,487 $ 145,070
Fair Value $ 302,163 $ 213,480
Preferred Equity | Investment Owned, At Cost | Investment Type Concentration Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 21.50% 17.00%
Preferred Equity | Investment Owned, At Fair Value | Investment Type Concentration Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 30.90% 23.20%
Common Equity/ Equivalents    
Summary of Investment Holdings [Line Items]    
Cost $ 49,597 $ 50,837
Fair Value $ 59,243 $ 93,465
Common Equity/ Equivalents | Investment Owned, At Cost | Investment Type Concentration Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 5.20% 6.00%
Common Equity/ Equivalents | Investment Owned, At Fair Value | Investment Type Concentration Risk    
Summary of Investment Holdings [Line Items]    
Percentage of Total Investments 6.00% 10.20%
[1] Cumulative gross unrealized appreciation for federal income tax purposes is $183.3 million; cumulative gross unrealized depreciation for federal income tax purposes is $144.9 million. Cumulative net unrealized appreciation is $38.5 million, based on a tax cost of $940.9 million.
[2] Cumulative gross unrealized appreciation for federal income tax purposes is $180.5 million; cumulative gross unrealized depreciation for federal income tax purposes is $115.8 million. Cumulative net unrealized appreciation is $64.7 million, based on a tax cost of $855.8 million.