Convertible Notes (Details 3) (Notes Due 2011 [Member], Notes Due 2013 [Member], USD $) In Thousands	Oct. 01, 2011	Jan. 01, 2011
Notes Due 2011 [Member] \| Notes Due 2013 [Member]
Balance and significant terms of Convertible Notes
Equity component of Convertible Senior Notes	$ 111,375	$ 111,375
Principal amount of Convertible Senior Notes	294,461	294,461
Unamortized debt discount of Convertible Senior Notes	(15,689)	(25,373)
Liability component of Convertible Senior Notes	$ 278,772	$ 269,088

The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

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