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Convertible Notes (Details 5) (Notes Due 2011 [Member], Notes Due 2013 [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
Notes Due 2011 [Member] \| Notes Due 2013 [Member]
Effective interest rate and components of 2011 and 2013 notes
Effective interest rate	6.30%	6.30%	6.30%
Contractual interest expense	$ 4,119	$ 5,579	$ 7,159
Amortization of debt discount	$ 12,654	$ 16,055	$ 19,440

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.

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