Annual report pursuant to Section 13 and 15(d)

INVESTMENTS - Summary Investment Holdings (Details)

v3.24.3
INVESTMENTS - Summary Investment Holdings (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Summary of Investment Holdings [Line Items]    
Cost $ 771,011 [1] $ 722,269 [2]
Fair Value 796,260 [1] 704,815 [2]
South    
Summary of Investment Holdings [Line Items]    
Fair Value 314,010 273,181
West    
Summary of Investment Holdings [Line Items]    
Fair Value 249,082 224,235
Midwest    
Summary of Investment Holdings [Line Items]    
Fair Value 192,897 145,122
Northeast    
Summary of Investment Holdings [Line Items]    
Fair Value 40,271 62,277
Diversified/Conglomerate Service    
Summary of Investment Holdings [Line Items]    
Fair Value 179,032 135,060
Diversified/Conglomerate Manufacturing    
Summary of Investment Holdings [Line Items]    
Fair Value 160,264 158,061
Aerospace and Defense    
Summary of Investment Holdings [Line Items]    
Fair Value 153,096 97,836
Healthcare, Education, and Childcare    
Summary of Investment Holdings [Line Items]    
Fair Value 101,707 146,438
Beverage, Food, and Tobacco    
Summary of Investment Holdings [Line Items]    
Fair Value 88,327 78,788
Automobile    
Summary of Investment Holdings [Line Items]    
Fair Value 28,286 27,571
Machinery    
Summary of Investment Holdings [Line Items]    
Fair Value 21,816 6,411
Oil and Gas    
Summary of Investment Holdings [Line Items]    
Fair Value 20,554 27,830
Cargo Transportation    
Summary of Investment Holdings [Line Items]    
Fair Value 20,200 0
Personal and Non-Durable Consumer Products    
Summary of Investment Holdings [Line Items]    
Fair Value 13,586 14,576
Other    
Summary of Investment Holdings [Line Items]    
Fair Value $ 9,392 $ 12,244
Investment Owned, At Cost | Investment Type Concentration Risk    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage 100.00% 100.00%
Investment Owned, At Fair Value | Investment Type Concentration Risk    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage 100.00% 100.00%
Investment Owned, At Fair Value | Industry Concentration Risk    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage 100.00% 100.00%
Investment Owned, At Fair Value | Industry Concentration Risk | Diversified/Conglomerate Service    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage 22.50% 19.20%
Investment Owned, At Fair Value | Industry Concentration Risk | Diversified/Conglomerate Manufacturing    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage 20.10% 22.40%
Investment Owned, At Fair Value | Industry Concentration Risk | Aerospace and Defense    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage 19.20% 13.90%
Investment Owned, At Fair Value | Industry Concentration Risk | Healthcare, Education, and Childcare    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage 12.80% 20.80%
Investment Owned, At Fair Value | Industry Concentration Risk | Beverage, Food, and Tobacco    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage 11.10% 11.20%
Investment Owned, At Fair Value | Industry Concentration Risk | Automobile    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage 3.60% 3.90%
Investment Owned, At Fair Value | Industry Concentration Risk | Machinery    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage 2.70% 0.90%
Investment Owned, At Fair Value | Industry Concentration Risk | Oil and Gas    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage 2.60% 3.90%
Investment Owned, At Fair Value | Industry Concentration Risk | Cargo Transportation    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage 2.50% 0.00%
Investment Owned, At Fair Value | Industry Concentration Risk | Personal and Non-Durable Consumer Products    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage 1.70% 2.10%
Investment Owned, At Fair Value | Industry Concentration Risk | Other    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage 1.20% 1.70%
Investment Owned, At Fair Value | Geographic Regions Risk    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage 100.00% 100.00%
Investment Owned, At Fair Value | Geographic Regions Risk | South    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage 39.40% 38.80%
Investment Owned, At Fair Value | Geographic Regions Risk | West    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage 31.30% 31.80%
Investment Owned, At Fair Value | Geographic Regions Risk | Midwest    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage 24.20% 20.60%
Investment Owned, At Fair Value | Geographic Regions Risk | Northeast    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage 5.10% 8.80%
Debt Securities    
Summary of Investment Holdings [Line Items]    
Cost $ 694,625 $ 659,826
Fair Value $ 668,685 $ 638,579
Debt Securities | Investment Owned, At Cost | Investment Type Concentration Risk    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage 90.10% 91.40%
Debt Securities | Investment Owned, At Fair Value | Investment Type Concentration Risk    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage 84.00% 90.60%
Secured first lien debt    
Summary of Investment Holdings [Line Items]    
Cost $ 580,736 $ 529,376
Fair Value $ 554,937 $ 510,701
Secured first lien debt | Investment Owned, At Cost | Investment Type Concentration Risk    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage 75.30% 73.30%
Secured first lien debt | Investment Owned, At Fair Value | Investment Type Concentration Risk    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage 69.70% 72.50%
Secured second lien debt    
Summary of Investment Holdings [Line Items]    
Cost $ 113,691 $ 130,252
Fair Value $ 113,716 $ 127,854
Secured second lien debt | Investment Owned, At Cost | Investment Type Concentration Risk    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage 14.80% 18.10%
Secured second lien debt | Investment Owned, At Fair Value | Investment Type Concentration Risk    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage 14.30% 18.10%
Unsecured debt    
Summary of Investment Holdings [Line Items]    
Cost $ 198 $ 198
Fair Value $ 32 $ 24
Unsecured debt | Investment Owned, At Cost | Investment Type Concentration Risk    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage 0.00% 0.00%
Unsecured debt | Investment Owned, At Fair Value | Investment Type Concentration Risk    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage 0.00% 0.00%
Equity Securities    
Summary of Investment Holdings [Line Items]    
Cost $ 76,386 $ 62,443
Fair Value $ 127,575 $ 66,236
Equity Securities | Investment Owned, At Cost | Investment Type Concentration Risk    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage 9.90% 8.60%
Equity Securities | Investment Owned, At Fair Value | Investment Type Concentration Risk    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage 16.00% 9.40%
Preferred equity    
Summary of Investment Holdings [Line Items]    
Cost $ 45,017 $ 35,617
Fair Value $ 31,346 $ 26,855
Preferred equity | Investment Owned, At Cost | Investment Type Concentration Risk    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage 5.80% 4.90%
Preferred equity | Investment Owned, At Fair Value | Investment Type Concentration Risk    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage 3.90% 3.80%
Common equity/equivalents    
Summary of Investment Holdings [Line Items]    
Cost $ 31,369 $ 26,826
Fair Value $ 96,229 $ 39,381
Common equity/equivalents | Investment Owned, At Cost | Investment Type Concentration Risk    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage 4.10% 3.70%
Common equity/equivalents | Investment Owned, At Fair Value | Investment Type Concentration Risk    
Summary of Investment Holdings [Line Items]    
Concentration risk, percentage 12.10% 5.60%
[1] Cumulative gross unrealized depreciation for federal income tax purposes is $66.1 million; cumulative gross unrealized appreciation for federal income tax purposes is $85.8 million. Cumulative net unrealized appreciation is $19.7 million, based on a tax cost of $776.5 million.
[2] Cumulative gross unrealized depreciation for federal income tax purposes is $56.9 million; cumulative gross unrealized appreciation for federal income tax purposes is $33.7 million. Cumulative net unrealized depreciation is $23.2 million, based on a tax cost of $728.0 million.