Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Sep. 30, 2017	Oct. 01, 2016
Earnings Per Share Reconciliation [Abstract]
Net income	$ 136,104	$ 124,856	$ 373,483	$ 347,125
Net income per basic common share	$ 1.71	$ 1.55	$ 4.67	$ 4.29
Effect of dilutive stock option, restricted stock, performance stock unit and restricted stock unit securities on earnings per share	(0.02)	(0.02)	(0.04)	(0.03)
Net income per diluted common share	$ 1.69	$ 1.53	$ 4.63	$ 4.26
Weighted-average number of basic common shares	79,712	80,677	79,908	80,923
Effect of dilutive stock option, restricted stock and restricted stock unit securities on shares outstanding	809	711	752	650
Weighted-average number of diluted common shares and equivalents	80,521	81,388	80,660	81,573
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share	200	500	400	800