Supplemental Disclosures to Consolidated Statements of Cash Flows (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 01, 2014	Apr. 02, 2013
Supplemental Cash Flow Elements [Abstract]
Interest paid	$ 73	$ 1,262
Income taxes paid	81	27
Purchases of property and equipment accrued in accounts payable, net	$ 1,020	$ (419)