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Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 01, 2017	Apr. 02, 2016
Earnings Per Share Reconciliation [Abstract]
Net income	$ 105,557	$ 94,052
Net income per basic common share	$ 1.32	$ 1.16
Effect of dilutive stock option, restricted stock, performance stock unit and restricted stock unit securities on earnings per share	(0.01)	(0.01)
Net income per diluted common share	$ 1.31	$ 1.15
Weighted-average number of basic common shares	80,073	81,275
Effect of dilutive stock option, restricted stock and restricted stock unit securities on shares outstanding	696	699
Weighted-average number of diluted common shares and equivalents	80,769	81,974
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share	1,100	1,200

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- Definition

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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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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