Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
COMPREHENSIVE INCOME (LOSS):
Net income	$ 411,146	$ 657,919	$ 598,626
Other comprehensive income (loss):
Foreign currency translation adjustments, net of tax	11,184	(25,274)	(18,702)
Foreign defined benefit plan adjustments, net of tax	(187)	4,273	812
Total other comprehensive income (loss)	10,997	(21,001)	(17,890)
Total comprehensive income (loss)	$ 422,143	$ 636,918	$ 580,736