Other (Expense) Income, Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Sep. 30, 2017	Oct. 01, 2016
Other Income and Expenses [Abstract]
Interest expense	$ (278)	$ (267)	$ (748)	$ (624)
Interest income	30	12	80	43
Other expense, net	$ (248)	$ (255)	$ (668)	$ (581)