v3.26.1
Transactions with Controlled Companies - Belnick, LLC (Details) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Dec. 31, 2025
May 23, 2025
May 22, 2025
Dec. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2024
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]              
Interest Income         $ 581,932 $ 671,109 $ 770,312
Structuring Fee         9,000 12,348 27,666
Administrative Agent         887 763 730
Total Other Income         10,555 28,949 79,397
Interest Receivable         17,350 25,144  
Belnick Holdings of Delaware, LLC | Belnick, LLC (d/b/a The Ubique Group)              
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]              
Ownership interest   100.00%   99.01%      
Subsidiaries | Reportable Legal Entities | Belnick, LLC (d/b/a The Ubique Group)              
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]              
Interest Income         11,508 2,748 0
Structuring Fee         0 33 0
Administrative Agent         50 0 0
Total Other Income         50 33 0
Reimbursement of Legal, Tax, etc         84 8 0
Additions         0 3,400 0
Interest Receivable         33 31  
Other Receivables         3 (41)  
Equity funding         3,400    
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         $ 11,505 $ 2,740 $ 0
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%