Consolidated Statements Of Cash Flows Supplemental Disclosures (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013
Statement of Cash Flows [Abstract]
Interest paid on long-term debt	$ 189	$ 246
Interest paid on lease financing obligations	23	26
Accruals for capital expenditures	1,046	3,672
Non-cash assets acquired	0	861
Non-cash reduction of capital lease assets and obligation	$ 1,055	$ 0