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Earnings Per Share - Antidilutive Securities (Details)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 28, 2014
Sep. 29, 2013
Sep. 28, 2014
Sep. 29, 2013
Stock Options [Member]
       
Antidilutive Securities Excluded from Computation of Diluted Earnings Per Share [Line Items]        
Antidilutive securities excluded from computation of diluted EPS 361 31 246 220
Restricted Stock Units [Member]
       
Antidilutive Securities Excluded from Computation of Diluted Earnings Per Share [Line Items]        
Antidilutive securities excluded from computation of diluted EPS 10 1 8 1