Amortization Expense of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Apr. 01, 2016
Goodwill And Intangible Assets Disclosure [Abstract]
Amortization expense – cost of revenue	$ 1,641	$ 1,184
Amortization expense – operating expenses	2,849	2,108
Total amortization expense	$ 4,490	$ 3,292