v3.26.1
Investments - Schedule of Investments by Industry Classification and Enumerates Percentage, by Fair Value, of Total Portfolio Assets Excluding Cash and Cash Equivalents (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Sep. 30, 2025
Schedule Of Investment Income Reported Amounts By Category [Line Items]    
Cost $ 1,228,191 [1],[2],[3],[4] $ 1,236,888 [5],[6],[7],[8],[9]
Fair Value 1,193,172 [1],[2],[3],[4],[10] 1,287,273 [5],[6],[7],[8],[9]
Investment Unaffiliated Issuer [Member]    
Schedule Of Investment Income Reported Amounts By Category [Line Items]    
Cost 850,440 [3],[4] 853,416 [8],[9]
Fair Value $ 834,543 [3],[4],[10] $ 857,415 [8],[9],[11]
Net Asset Value Percentage 195.00% [3],[4] 184.80%
Total Industry [Member]    
Schedule Of Investment Income Reported Amounts By Category [Line Items]    
Cost [12] $ 1,005,546 $ 1,014,243
Fair Value [12] $ 1,001,266 $ 1,079,473
Fair Value Percentage [12] 100.00% 100.00%
Net Asset Value Percentage [12] 234.00% 234.00%
Short-Term U.S. Government Securities    
Schedule Of Investment Income Reported Amounts By Category [Line Items]    
Cost [12] $ 269,308 $ 124,809
Fair Value [12] $ 269,266 $ 124,788
Fair Value Percentage [12] 27.00% 12.00%
Net Asset Value Percentage [12] 63.00% 27.00%
Healthcare, Education and Childcare    
Schedule Of Investment Income Reported Amounts By Category [Line Items]    
Cost [12] $ 106,550 $ 128,969
Fair Value [12] $ 157,621 $ 168,000
Fair Value Percentage [12] 16.00% 16.00%
Net Asset Value Percentage [12] 36.00% 36.00%
Financial Services    
Schedule Of Investment Income Reported Amounts By Category [Line Items]    
Cost [12] $ 72,458 $ 70,403
Fair Value [12] $ 69,590 $ 68,959
Fair Value Percentage [12] 7.00% 6.00%
Net Asset Value Percentage [12] 16.00% 15.00%
Distribution    
Schedule Of Investment Income Reported Amounts By Category [Line Items]    
Cost [12] $ 39,030 $ 57,352
Fair Value [12] $ 53,791 $ 130,850
Fair Value Percentage [12] 5.00% 12.00%
Net Asset Value Percentage [12] 13.00% 28.00%
Consumer Products    
Schedule Of Investment Income Reported Amounts By Category [Line Items]    
Cost [12] $ 39,455 $ 53,746
Fair Value [12] $ 30,973 $ 49,414
Fair Value Percentage [12] 3.00% 5.00%
Net Asset Value Percentage [12] 7.00% 11.00%
Auto Sector    
Schedule Of Investment Income Reported Amounts By Category [Line Items]    
Cost [12] $ 51,623 $ 26,621
Fair Value [12] $ 49,613 $ 27,826
Fair Value Percentage [12] 5.00% 2.00%
Net Asset Value Percentage [12] 12.00% 6.00%
Gaming    
Schedule Of Investment Income Reported Amounts By Category [Line Items]    
Cost [12] $ 24,118 $ 22,853
Fair Value [12] $ 24,841 $ 23,151
Fair Value Percentage [12] 2.00% 2.00%
Net Asset Value Percentage [12] 6.00% 5.00%
Diversified Conglomerate Service    
Schedule Of Investment Income Reported Amounts By Category [Line Items]    
Cost [12] $ 16,643 $ 17,268
Fair Value [12] $ 16,157 $ 16,416
Fair Value Percentage [12] 2.00% 1.00%
Net Asset Value Percentage [12] 4.00% 4.00%
Environmental Services    
Schedule Of Investment Income Reported Amounts By Category [Line Items]    
Cost [12] $ 60,905 $ 61,588
Fair Value [12] $ 25,231 $ 31,238
Fair Value Percentage [12] 3.00% 3.00%
Net Asset Value Percentage [12] 6.00% 7.00%
Consumer Services    
Schedule Of Investment Income Reported Amounts By Category [Line Items]    
Cost [12] $ 20,477 $ 19,067
Fair Value [12] $ 20,180 $ 19,319
Fair Value Percentage [12] 2.00% 2.00%
Net Asset Value Percentage [12] 5.00% 4.00%
Business Services    
Schedule Of Investment Income Reported Amounts By Category [Line Items]    
Cost [12] $ 147,900 $ 195,614
Fair Value [12] $ 125,591 $ 184,452
Fair Value Percentage [12] 13.00% 17.00%
Net Asset Value Percentage [12] 29.00% 40.00%
Personal, Food and Miscellaneous Services    
Schedule Of Investment Income Reported Amounts By Category [Line Items]    
Cost [12] $ 15,743 $ 16,207
Fair Value [12] $ 19,349 $ 18,769
Fair Value Percentage [12] 2.00% 2.00%
Net Asset Value Percentage [12] 5.00% 4.00%
Manufacturing / Basic Industries    
Schedule Of Investment Income Reported Amounts By Category [Line Items]    
Cost [12] $ 17,121 $ 42,601
Fair Value [12] $ 17,832 $ 43,067
Fair Value Percentage [12] 2.00% 4.00%
Net Asset Value Percentage [12] 4.00% 9.00%
Media    
Schedule Of Investment Income Reported Amounts By Category [Line Items]    
Cost [12] $ 18,416 $ 17,477
Fair Value [12] $ 17,364 $ 17,434
Fair Value Percentage [12] 2.00% 2.00%
Net Asset Value Percentage [12] 4.00% 4.00%
All Other    
Schedule Of Investment Income Reported Amounts By Category [Line Items]    
Cost [12] $ 16,237 $ 52,012
Fair Value [12] $ 15,907 $ 53,042
Fair Value Percentage [12] 1.00% 6.00%
Net Asset Value Percentage [12] 3.00% 11.00%
Transportation    
Schedule Of Investment Income Reported Amounts By Category [Line Items]    
Cost [12] $ 12,766 $ 9,787
Fair Value [12] $ 7,063 $ 4,655
Fair Value Percentage [12] 1.00% 0.00%
Net Asset Value Percentage [12] 2.00% 1.00%
Machinery    
Schedule Of Investment Income Reported Amounts By Category [Line Items]    
Cost [12] $ 1,645 $ 1,645
Fair Value [12] $ 3,792 $ 3,083
Fair Value Percentage [12] 0.00% 0.00%
Net Asset Value Percentage [12] 1.00% 1.00%
Chemicals, Plastics and Rubber    
Schedule Of Investment Income Reported Amounts By Category [Line Items]    
Cost [12] $ 16,152 $ 15,237
Fair Value [12] $ 13,502 $ 12,240
Fair Value Percentage [12] 1.00% 1.00%
Net Asset Value Percentage [12] 3.00% 3.00%
Telecommunications    
Schedule Of Investment Income Reported Amounts By Category [Line Items]    
Cost [12] $ 9,947 $ 22,305
Fair Value [12] $ 10,424 $ 13,695
Fair Value Percentage [12] 1.00% 1.00%
Net Asset Value Percentage [12] 2.00% 3.00%
Building Materials    
Schedule Of Investment Income Reported Amounts By Category [Line Items]    
Cost [12] $ 4,248 $ 4,116
Fair Value [12] $ 3,988 $ 3,982
Fair Value Percentage [12] 0.00% 0.00%
Net Asset Value Percentage [12] 1.00% 1.00%
Electronics    
Schedule Of Investment Income Reported Amounts By Category [Line Items]    
Cost [12] $ 10,801 $ 2,507
Fair Value [12] $ 10,958 $ 5,485
Fair Value Percentage [12] 1.00%  
Net Asset Value Percentage [12] 3.00% 1.00%
Buildings and Real Estate    
Schedule Of Investment Income Reported Amounts By Category [Line Items]    
Cost [12] $ 9,277 $ 12,546
Fair Value [12] $ 9,292 $ 12,495
Fair Value Percentage [12] 1.00% 1.00%
Net Asset Value Percentage [12] 2.00% 3.00%
Aerospace and Defense    
Schedule Of Investment Income Reported Amounts By Category [Line Items]    
Cost [12] $ 24,726 $ 39,513
Fair Value [12] $ 28,941 $ 47,113
Fair Value Percentage [12] 3.00% 4.00%
Net Asset Value Percentage [12] 7.00% 10.00%
[1] All investments are in US Companies unless noted otherwise. Total cost, fair value, and percentage of Net Assets for the U.S. Companies were $1,174.2 million, $1,081.2 million, and 252.6%
[2] All of our investments are not registered under the 1933 Act and have restrictions on resale.
[3] The provisions of the 1940 Act classify investments based on the level of control that we maintain in a particular portfolio company. As defined in the 1940 Act, a company is generally presumed to be “non-controlled” when we own 25% or less of the portfolio company’s voting securities and “controlled” when we own more than 25% of the portfolio company’s voting securities.
[4] The provisions of the 1940 Act classify investments further based on the level of ownership that we maintain in a particular portfolio company. As defined in the 1940 Act, a company is generally deemed as “non-affiliated” when we own less than 5% of a portfolio company’s voting securities and “affiliated” when we own 5% or more of a portfolio company’s voting securities (See Note 6).
[5] All investments are in US Companies unless noted otherwise. Total cost, fair value, and percentage of Net Assets for the U.S. Companies were $1,181.8 million, $1,198.6 million, and 258.4%
[6] All of our investments are not registered under the 1933 Act and have restrictions on resale.
[7] Non-income producing securities.
[8] The provisions of the 1940 Act classify investments based on the level of control that we maintain in a particular portfolio company. As defined in the 1940 Act, a company is generally presumed to be “non-controlled” when we own 25% or less of the portfolio company’s voting securities and “controlled” when we own more than 25% of the portfolio company’s voting securities.
[9] The provisions of the 1940 Act classify investments further based on the level of ownership that we maintain in a particular portfolio company. As defined in the 1940 Act, a company is generally deemed as “non-affiliated” when we own less than 5% of a portfolio company’s voting securities and “affiliated” when we own 5% or more of a portfolio company’s voting securities (See Note 6).
[10] Valued based on our accounting policy (See Note 2).
[11] Valued based on our accounting policy (See Note 2).
[12] Excludes investments in PSLF.