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Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended
Mar. 31, 2018
Apr. 01, 2017
Numerator:    
Numerator for basic and diluted net income per share - net income $ 129,374 $ 238,404
Denominator:    
Denominator for basic net income per share - weighted-average common shares 188,322 188,333
Effect of dilutive securities - stock options, stock appreciation rights and restricted stock units 970 698
Denominator for diluted net income per share - adjusted weighted-average common shares 189,292 189,031
Basic net income per share (in dollars per share) $ 0.69 $ 1.27
Diluted net income per share (in dollars per share) $ 0.68 $ 1.26