CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net income	$ 1,014,589	$ 784,147	$ 467,468
Other comprehensive income, net of tax:
Foreign currency translation adjustment, net of tax of $0, respectively	(36,207)	48,903	(10,991)
Available-for-sale marketable securities:
Unrealized (losses) gains on marketable securities arising during period, net of tax of $(578), $1,629, $1,659, respectively	(2,255)	5,839	6,015
Less: Reclassification adjustment for gains included in net income, net of tax of $(277), $(665), $(192), respectively	(995)	(2,365)	(690)
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Total	(3,250)	3,474	5,325
Defined benefit pension and post-retirement plans:
Amortization of prior service credit, net of tax $(2), $(2), $(43), respectively	(7)	(7)	(148)
Other comprehensive income (loss)	(39,464)	52,370	(5,814)
Comprehensive income	$ 975,125	$ 836,517	$ 461,654