Consolidated Statements of Operations (Parenthetical) (USD $)	3 Months Ended		6 Months Ended
	Jun. 27, 2014	Jun. 28, 2013	Jun. 27, 2014	Jun. 28, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total share based compensation			$ 2,744,000	$ 3,167,000
Cost of Sales [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total share based compensation	785,000	863,000	1,400,000	1,686,000
Selling General and Administrative [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total share based compensation	$ 691,000	$ 782,000	$ 1,344,000	$ 1,481,000