v3.26.1
INVESTMENT IN RELATED PARTY INVESTMENT FUND - Schedule of Summarized Statements of Assets, Liabilities and Net Assets of SILP (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Expenses    
Interest $ (99) $ (1,464)
Total expenses (153,795) (182,393)
Net investment income 6,731 8,287
Realized and change in unrealized gains (losses)    
Net gain on investment transactions 387 111
Net increase in Partners' capital 35,750 29,627
Income from investment in related party investment fund (see Note 3) 33,689 32,197
Management fees 1,866 1,730
Performance allocation 3,743 3,578
Total 5,609 5,308
Solasglas Investments, LP (SILP)    
Realized and change in unrealized gains (losses)    
Income from investment in related party investment fund (see Note 3) 33,689 32,197
Solasglas Investments, LP (SILP)    
Investment income    
Dividend income (net of withholding taxes) 1,519 1,490
Interest income 3,362 3,627
Total Investment income 4,881 5,117
Expenses    
Management fee (1,866) (1,730)
Interest (551) (1,701)
Dividends (1,401) (761)
Research and operating (504) (485)
Total expenses (4,322) (4,677)
Net investment income 559 440
Realized and change in unrealized gains (losses)    
Net realized gain 61,966 19,105
Net change in unrealized appreciation (depreciation) (16,423) 27,018
Net gain on investment transactions 45,543 46,123
Net increase in Partners' capital $ 46,102 $ 46,563