Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Net income	$ 36,029	$ 38,891
Other comprehensive income (loss):
Pension and postemployment liability adjustments (net of tax expense (benefit) of ($60) and ($32), respectively)	(188)	(181)
Pension and postemployment reclassification adjustments (net of tax (benefit) expense of ($5) and $36, respectively)	185	(101)
Unrealized (loss) gain on investments		947
Foreign currency translation adjustments	(276)	4,962
Comprehensive income	$ 35,750	$ 44,518