Net Income per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 29, 2014		Mar. 30, 2013
Earnings Per Share, Diluted [Line Items]
Net income attributable to shareholders	$ 107,120		$ 77,875
Weighted average shares outstanding - basic	99,948		105,889
Net effect of various dilutive stock-based compensation awards	1,451		1,935
Weighted average shares outstanding - diluted	101,399		107,824
Net income per share:
Basic	$ 1.07		$ 0.74
Diluted	$ 1.06	[1]	$ 0.72	[1]
Stock Compensation Plan [Member]
Net income per share:
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	492		1,360

[1] Stock-based compensation awards for the issuance of 492 and 1,360 shares for the first quarters of 2014 and 2013, respectively, were excluded from the computation of net income per share on a diluted basis as their effect was anti-dilutive.