Net Income Per Share (Details) (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Oct. 01, 2011	Oct. 02, 2010	Oct. 01, 2011	Oct. 02, 2010
Basic and diluted net income per share
Net income	$ 28,106	$ 126,753	$ 61,337	$ 163,575
Weighted average common shares used to calculate basic net income per share	264,723	258,606	263,149	261,122
2023 Notes	11	11	11	11
Options	3,196	1,678	3,390	1,409
Restricted stock	2,735	2,945	3,407	2,801
Employee stock purchase plan (ESPP)	76	62	111	40
Weighted average common shares used to calculate diluted net income per share	270,741	263,302	270,068	265,383
Basic net income per share	$ 0.11	$ 0.49	$ 0.23	$ 0.63
Diluted net income per share	$ 0.10	$ 0.48	$ 0.23	$ 0.62