Net Income per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended
		Apr. 01, 2017	Apr. 02, 2016
Earnings Per Share, Diluted [Line Items]
Net income attributable to shareholders		$ 113,768	$ 106,235
Weighted average shares outstanding - basic		89,262	91,514
Net effect of various dilutive stock-based compensation awards		1,279	1,273
Weighted average shares outstanding - diluted		90,541	92,787
Net income per share:
Basic		$ 1.27	$ 1.16
Diluted	[1]	$ 1.26	$ 1.14
Stock Compensation Plan [Member]
Net income per share:
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		244	1,039

[1] Stock-based compensation awards for the issuance of 244 and 1,039 shares for the first quarter of 2017 and 2016, respectively, were excluded from the computation of net income per share on a diluted basis as their effect was anti-dilutive.