CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 738,347	$ 762,994	$ 712,949
Other comprehensive income (loss), net of tax:
Change in unrealized investment gains and losses	137,192	9,070	141,548
Benefit plans adjustment	16,576	19,049	23,682
Other comprehensive income (loss), net of tax	153,768	28,119	165,230
Comprehensive income	$ 892,115	$ 791,113	$ 878,179