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