CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net income	$ 161,432	$ 149,456	$ 199,424	$ 202,991
Other comprehensive income (loss):
Foreign currency translation (loss) gain	(1,837)	1,876	(2,619)	(3,432)
Unrealized loss on marketable securities, net of tax	(1,094)	(133)	(4,187)	(165)
Defined benefit pension gain, net of tax	282	342	564	684
Other comprehensive income (loss)	(2,649)	2,085	(6,242)	(2,913)
Comprehensive income	$ 158,783	$ 151,541	$ 193,182	$ 200,078