v3.26.3
Transactions with Controlled Companies - Belnick, LLC (Details) - USD ($)
$ in Thousands
3 Months Ended
Dec. 31, 2025
May 23, 2025
May 22, 2025
Mar. 31, 2025
Sep. 30, 2026
Sep. 30, 2025
Jun. 30, 2026
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]              
Interest Income         $ 132,608 $ 152,394  
Structuring Fee         10,605 1,299  
Administrative Agent         255 191  
Total Other Income         13,658 1,657  
Interest Receivable         23,039   $ 17,350
Subsidiaries | Reportable Legal Entities | Belnick, LLC (d/b/a The Ubique Group)              
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]              
Interest Income         3,079 2,863  
Structuring Fee         0 13  
Administrative Agent         13 0  
Total Other Income         13 13  
Reimbursement of Legal, Tax, etc         8 84  
Interest Receivable         34   33
Other Receivables         4   $ 3
Subsidiaries | Reportable Legal Entities | Belnick, LLC (d/b/a The Ubique Group) | Prospect Administration LLC              
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]              
Total Interest Income Capitalized as PIK         $ 2,207 $ 2,863  
Subsidiaries | Reportable Legal Entities | Belnick Holdings of Delaware, LLC              
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]              
Ownership interest 100.00% 100.00% 100.00% 100.00%