Long-Term Debt (Details 2) (USD $) In Thousands	6 Months Ended		3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended
	Jul. 02, 2011	Jul. 03, 2010	Jul. 02, 2011 Convertible Senior Debentures 2041	Jul. 02, 2011 Convertible Senior Debentures 2041	Jul. 02, 2011 Convertible Senior Debentures Due In 2040	Jul. 02, 2011 Convertible Senior Debentures Due In 2040
Contractual coupon interest			$ 441	$ 441	$ 1,547	$ 3,094
Accretion of interest on convertible debentures	861	0	102	102	383	759
Non-cash amortization of deferred financing costs			6	6	22	44
Non-cash change in value of derivative liability			2	2	69	8
Total interest expense related to the debentures			$ 551	$ 551	$ 2,021	$ 3,905