Inventories, net (Details) - USD ($) $ in Thousands	Jul. 04, 2015	Dec. 31, 2014
Inventory Disclosure [Abstract]
Raw materials	$ 20,471	$ 17,848
Work-in-process	15,620	12,377
Finished products	22,038	21,634
Balance, end of the period	$ 58,129	$ 51,859	[1]

[1] The balance sheet as of December 31, 2014 has been derived from the audited financial statements at that date.