Net Income Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012	Jul. 02, 2011
Earnings Per Share, Basic and Diluted [Abstract]
Net income	$ 36,386	$ 26,908	$ 67,490	$ 33,231
Weighted-average common shares used to calculate basic net income per share	269,739	263,191	268,840	262,362
2023 Notes	11	11	11	11
2015 Warrants	637		1,580
Stock-based compensation	4,931	7,683	6,095	7,359
Weighted average common shares used to calculate diluted net income per share	275,318	270,885	276,526	269,732
Basic net income per share	$ 0.13	$ 0.10	$ 0.25	$ 0.13
Diluted net income per share	$ 0.13	$ 0.10	$ 0.24	$ 0.12