Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 36,989	$ 36,029
Other comprehensive income (loss):
Pension and postemployment adjustment, net of tax	(49)	(3)
Foreign currency translation adjustments	8,122	(276)
Comprehensive income	$ 45,062	$ 35,750