Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 43,792	$ 42,326	$ 80,781	$ 78,354
Other comprehensive income (loss):
Pension and postemployment adjustment, net of tax	161	766	112	763
Foreign currency translation adjustments	(5,892)	(16,708)	2,230	(16,984)
Comprehensive income	$ 38,061	$ 26,384	$ 83,123	$ 62,133