v3.26.1
Investments - Consolidated Statements of Operations for PSSL (Details) - USD ($)
$ in Thousands
 1 Months Ended 3 Months Ended 6 Months Ended
Dec. 31, 2025
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2026
Mar. 31, 2025
Expenses:          
Interest expense on notes to members   $ 24,139 $ 22,529 $ 51,293 $ 44,890
Administration fees   1,200 1,200 2,400 2,400
Total expenses   40,208 36,908 83,659 73,950
Realized and unrealized gain (loss) on investments:          
Net realized gain (loss) on Investments   (7,535) (3,477) (6,079) 23,197
Debt extinguishment   (1,380) 0 (1,380) 0
Net realized gain (loss) on:          
Net increase (decrease) in members' equity resulting from operations   28,738 1,225 25,159 29,553
PennantPark Senior Secured Loan Fund I LLC          
Investment income:          
Interest Income   28,992 27,350 58,159 56,776
Other income   218 205 524 788
Total investment income   29,210 27,555 58,683 57,564
Expenses:          
Interest and expenses on credit facility and asset-backed debt [1]   13,914 13,731 28,216 27,816
Interest expense on notes to members [1]   7,984 8,393 16,296 17,247
Administration fees [1]   795 717 1,553 1,385
General and administrative expenses [1]   633 414 1,096 906
Total expenses [1]   23,326 23,255 47,161 47,354
Net investment income   5,884 4,300 11,522 10,210
Realized and unrealized gain (loss) on investments:          
Net realized gain (loss) on Investments   (14,364) (7,788) (16,540) (6,455)
Net change in unrealized appreciation (depreciation) on investments   108 (4,252) (10,278) (15,142)
Net realized and unrealized gain (loss) on investments   (14,256) (12,040) (26,818) (21,597)
Net realized gain (loss) on:          
Net increase (decrease) in members' equity resulting from operations   (8,372) $ (7,740) $ (15,296) $ (11,387)
Pennant Park Senior Secured Loan Fund II L L C [Member]          
Investment income:          
Interest Income $ 8,535 6,333      
Other income 25 18      
Total investment income 8,560 6,351      
Expenses:          
Interest and expenses on credit facility and asset-backed debt [2] 3,487 2,659      
Interest expense on notes to members [2] 3,019 2,238      
Administration fees [2] 294 233      
General and administrative expenses [2] 239 156      
Debt issuance costs [2] 33 33      
Total expenses [2] 7,039 5,286      
Net investment income [2] 1,488 1,032      
Realized and unrealized gain (loss) on investments:          
Net realized gain (loss) on Investments 0 0      
Net change in unrealized appreciation (depreciation) on investments (616) (135)      
Net realized and unrealized gain (loss) on investments (616) (135)      
Net realized gain (loss) on:          
Net increase (decrease) in members' equity resulting from operations $ 872 $ 897      
[1] No management or incentive fees are payable by PSSL. If any fees were to be charged, they would be separately disclosed in the Consolidated Statement of Operations. PSSL pays the Administrator an annual fee of 0.25% of average gross assets under management on a quarterly basis.
[2] No management or incentive fees are payable by PSSL II. If any fees were to be charged, they would be separately disclosed in the Consolidated Statement of Operations. PSSL II pays the Administrator an annual fee of 0.25% of the total assets under management on a quarterly basis.