Supplemental Disclosures to Consolidated Statements of Cash Flows (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 29, 2015	Sep. 30, 2014
Supplemental Cash Flow Elements [Abstract]
Interest paid (net of amounts capitalized)	$ 445	$ 81
Income taxes paid	379	505
Changes in purchases of property and equipment accrued in accounts payable, net	$ (115)	$ (377)