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Net Earnings (Loss) Per Share - Antidilutive Securities (Details)
3 Months Ended 9 Months Ended
Sep. 27, 2014
Sep. 28, 2013
Sep. 27, 2014
Sep. 28, 2013
Earnings Per Share [Abstract]        
Antidilutive securities 0 8,851,000 0 25,513,000