CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 633,125	$ 408,375	$ 430,158
Defined benefit plans reclassification including pension costs:
Actuarial gain	3,885	3,762	7,742
Prior service credits (costs)	12	8	(116)
Postretirement benefits reclassification including benefit costs:
Actuarial gain (loss)	2,239	(6,031)	7,991
Unrealized gain on short-term investments	25	0	0
Pension plan settlement	0	82,822	0
Foreign currency translation adjustment	0	0	9
Other comprehensive income, net of tax	6,161	80,561	15,626
Comprehensive income	$ 639,286	$ 488,936	$ 445,784