v3.26.1
Investments - Schedule of Realized And Unrealized Gains (Losses) on Investments (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Net Investment Income [Line Items]        
Gross realized gains: $ 21,425 $ 3,528 $ 35,171 $ 32,794
Gross realized (losses): (367) (19,137) (910) (11,493)
Net unrealized gains (losses) on investments: (2,467) 17,018 (6,205) (24,491)
Net realized and unrealized gains (losses) 18,591 1,409 28,056 (3,190)
Fixed-maturity securities, available-for-sale        
Net Investment Income [Line Items]        
Gross realized gains: 101 3,528 1,444 6,363
Gross realized (losses): (192) (10) (351) (12)
Utility & Infrastructure Investments        
Net Investment Income [Line Items]        
Gross realized gains: 21,324 0 33,727 26,416
Gross realized (losses): (174) (19,126) (547) (11,480)
Net unrealized gains (losses) on investments: (2,519) 17,018 (6,257) (24,491)
Securities sold, not yet purchased        
Net Investment Income [Line Items]        
Gross realized gains: 0 0 0 15
Short-term investments        
Net Investment Income [Line Items]        
Gross realized (losses): (1) (1) (12) (1)
Equity securities        
Net Investment Income [Line Items]        
Net unrealized gains (losses) on investments: $ 52 $ 0 $ 52 $ 0