Fair Value of Financial Instruments - Net Change in Fair Value on Foreign Currency Translation on Outstanding Borrowings (Details) £ in Thousands, $ in Thousands, $ in Thousands |
6 Months Ended | 12 Months Ended | ||||
|---|---|---|---|---|---|---|
|
Mar. 31, 2026
USD ($)
|
Sep. 30, 2025
USD ($)
|
Mar. 31, 2026
GBP (£)
|
Mar. 31, 2026
CAD ($)
|
Sep. 30, 2025
GBP (£)
|
Sep. 30, 2025
CAD ($)
|
|
| Net Change In Fair Value On Foreign Currency Translation On Outstanding Borrowings [Line Items] | ||||||
| Amount Borrowed | $ 199,480 | $ 425,477 | ||||
| Borrowing Cost | $ 201,456 | $ 426,456 | ||||
| Other Currency [Member] | ||||||
| Net Change In Fair Value On Foreign Currency Translation On Outstanding Borrowings [Line Items] | ||||||
| Amount Borrowed | $ 2,800 | $ 2,800 | ||||
| Borrowing Cost | 2,036 | |||||
| Current Value | 2,012 | |||||
| Reset Date | Apr. 27, 2026 | Oct. 29, 2025 | ||||
| Unrealized appreciation/ (depreciation) | 30 | $ 24 | ||||
| Truist Credit Facility | ||||||
| Net Change In Fair Value On Foreign Currency Translation On Outstanding Borrowings [Line Items] | ||||||
| Amount Borrowed | £ | £ 36,000 | £ 36,000 | ||||
| Borrowing Cost | 49,420 | 2,036 | 49,420 | |||
| Current Value | 47,473 | $ 2,006 | 48,465 | |||
| Reset Date | Jun. 30, 2026 | Dec. 31, 2025 | ||||
| Unrealized appreciation/ (depreciation) | £ | £ 1,947 | £ 955 | ||||