v3.26.1
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Net Income (loss) $ 49,699 $ 44,174 $ 272,531 $ 211,730
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]        
Net unrealized gain (loss) from pension and postretirement plans, net of tax (555) (1,012) (1,105) (2,026)
Other comprehensive income (loss) (555) (1,012) (1,105) (2,026)
Comprehensive income (loss) 49,144 43,162 271,426 209,704
Subsidiaries        
Net Income (loss) 79,745 68,320 326,183 254,334
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]        
Net unrealized gain (loss) from pension and postretirement plans, net of tax (70) (66) (141) (131)
Amortization of treasury interest rate swaps to earnings, net of tax 96 95 193 192
Other comprehensive income (loss) 26 29 52 61
Comprehensive income (loss) $ 79,771 $ 68,349 $ 326,235 $ 254,395