v3.26.1
Investment Funds (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Schedule of Equity Method Investments [Line Items]          
Unfunded commitments $ 241,000   $ 241,000    
Investment funds 1,431,427   1,431,427   $ 1,361,802
Income (Loss) from Investment Funds     68,311 $ 54,291  
Written premiums ceded 713,766 $ 626,330 1,325,186 1,176,966  
Fair Value          
Schedule of Equity Method Investments [Line Items]          
Trading account receivables from brokers and clearing organizations 3,139   3,139   11,669
Financial services (1)          
Schedule of Equity Method Investments [Line Items]          
Investment funds 157,339   157,339   163,098
Income (Loss) from Investment Funds     11,905 5,614  
Transportation          
Schedule of Equity Method Investments [Line Items]          
Investment funds 356,653   356,653   360,320
Income (Loss) from Investment Funds     10,967 12,277  
Real Estate          
Schedule of Equity Method Investments [Line Items]          
Investment funds 274,390   274,390   272,775
Income (Loss) from Investment Funds     22,307 20,714  
Energy          
Schedule of Equity Method Investments [Line Items]          
Investment funds 42,872   42,872   41,966
Income (Loss) from Investment Funds     4,807 (1,234)  
Infrastructure          
Schedule of Equity Method Investments [Line Items]          
Investment funds 179,235   179,235   169,847
Income (Loss) from Investment Funds     9,823 9,064  
Other funds          
Schedule of Equity Method Investments [Line Items]          
Investment funds 420,938   420,938   353,796
Income (Loss) from Investment Funds     8,502 $ 7,856  
Deferred compensation trust assets $ 51,000   $ 51,000   $ 43,000