Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016
Earnings Per Share, Basic and Diluted [Abstract]
Net income	$ 69,127	$ 49,335	$ 137,386	$ 99,897
Weighted-average common shares used to calculate basic net income per share (in shares)	271,887	288,191	271,030	292,403
Stock-based awards	7,639	7,010	7,601	6,915
Weighted average common shares used to calculate diluted net income per share (in shares)	279,526	295,201	278,631	299,318
Net income per share - basic (in usd per share)	$ 0.25	$ 0.17	$ 0.51	$ 0.34
Net income per share - diluted (in usd per share)	$ 0.25	$ 0.17	$ 0.49	$ 0.33