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Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 02, 2016	Apr. 04, 2015
Earnings Per Share Reconciliation [Abstract]
Net income	$ 94,052	$ 96,061
Net income per basic common share	$ 1.16	$ 1.16
Effect of dilutive stock option, restricted stock and restricted stock unit securities on earnings per share	(0.01)	(0.01)
Net income per diluted common share	$ 1.15	$ 1.15
Weighted-average number of basic common shares	81,275	83,025
Effect of dilutive stock option, restricted stock and restricted stock unit securities on shares outstanding	699	727
Weighted-average number of diluted common shares and equivalents	81,974	83,752
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share	1,200	600

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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