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Earnings Per Share (Additional Information) (Details) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jul. 01, 2017
Jun. 30, 2018
Jul. 01, 2017
Earnings Per Share [Abstract]        
Anti-dilutive stock options 104,144 1,814,701 107,203 1,836,686