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Consolidated Entity - ISP Fund LP (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
CONSOLIDATED ENTITIES      
Total assets $ 1,635,165 $ 1,301,060  
ISP Fund LP      
CONSOLIDATED ENTITIES      
Capital contribution $ 300,000    
Economic interest of the Partnership (in percent) 100.00%    
Cash distribution $ 121,000    
Total liabilities 200 200  
Net investment-related income (expense) earned (incurred) (2,500) (3,700) $ (4,300)
Investment income, interest 3,400 4,400 6,300
Unrealized loss on other equity investments 12,700 (51,500) (6,700)
Realized gain on equity investments (68,700) (5,300) $ (2,400)
Total assets $ 79,700 $ 255,700