Other Expense, Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Other Income and Expenses [Abstract]
Interest expense	$ 1,836	$ 278	$ 3,817	$ 748
Interest income	0	(30)	(3)	(80)
Other expense, net	$ 1,836	$ 248	$ 3,814	$ 668