Convertible Notes (Details 4) (Notes Due 2011 [Member], Notes Due 2013 [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Oct. 01, 2011	Oct. 02, 2010	Oct. 01, 2011	Oct. 02, 2010
Notes Due 2011 [Member] \| Notes Due 2013 [Member]
Effective interest rate, Contractual interest expense and Amortization of debt discount of Senior Notes
Effective interest rate	6.30%	6.30%	6.30%	6.30%
Contractual interest expense	$ 1,053	$ 1,075	$ 3,161	$ 4,515
Amortization of debt discount	$ 3,275	$ 3,130	$ 9,684	$ 12,931

The component of interest expense representing the noncash expenses charged against earnings in the period to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate caption: Noncash Interest Expense.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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