Consolidated Statements Of Cash Flows Supplemental Disclosures - USD ($) $ in Thousands	3 Months Ended
	Apr. 02, 2017	Apr. 03, 2016
Statement of Cash Flows [Abstract]
Interest paid on long-term debt	$ 485	$ 312
Interest paid on lease financing obligations	40	26
Accruals for capital expenditures	380	2,387
Income taxes refunded (paid)	0	0
Capital lease obligations acquired or incurred	$ 94	$ 263