CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 192,482	$ 204,228	$ 377,942	$ 378,325
Other comprehensive income (loss), net of tax:
Change in unrealized investment gains and losses	28,523	(7,459)	80,194	(17,851)
Benefit plan adjustments	2,953	538	2,999	1,077
Other comprehensive income (loss), net of tax	31,476	(6,921)	83,193	(16,774)
Comprehensive income (loss)	$ 223,958	$ 197,307	$ 461,135	$ 361,551