Convertible Notes (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 01, 2011
Extinguishment of Debt [Line Items]
Principal amount repurchased	$ 205,539
Unamortized debt discount	(22,738)
Extinguishment of liability component	(186,746)
Related debt issuance costs	(1,760)
Loss on early extinguishment of debt	(5,705)
Notes Due 2011 [Member]
Extinguishment of Debt [Line Items]
Principal amount repurchased	100,000
Unamortized debt discount	(6,958)
Extinguishment of liability component	(95,865)
Related debt issuance costs	(676)
Loss on early extinguishment of debt	(3,499)
Notes Due 2013 [Member]
Extinguishment of Debt [Line Items]
Principal amount repurchased	105,539
Unamortized debt discount	(15,780)
Extinguishment of liability component	(90,881)
Related debt issuance costs	(1,084)
Loss on early extinguishment of debt	$ (2,206)