Net Income per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Oct. 01, 2016	Sep. 26, 2015	Oct. 01, 2016	Sep. 26, 2015
Earnings Per Share, Diluted [Line Items]
Net income attributable to shareholders		$ 117,727	$ 109,244	$ 358,232	$ 339,234
Weighted average shares outstanding - basic		90,937	94,302	91,412	95,277
Net effect of various dilutive stock-based compensation awards		1,001	1,061	1,075	1,025
Weighted average shares outstanding - diluted		91,938	95,363	92,487	96,302
Net income per share:
Basic		$ 1.29	$ 1.16	$ 3.92	$ 3.56
Diluted	[1]	$ 1.28	$ 1.15	$ 3.87	$ 3.52
Stock Compensation Plan [Member]
Net income per share:
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		824	759	821	656

[1] Stock-based compensation awards for the issuance of 824 and 821 shares for the third quarter and first nine months of 2016 and 759 and 656 shares for the third quarter and first nine months of 2015, respectively, were excluded from the computation of net income per share on a diluted basis as their effect was anti-dilutive.