Financing Arrangments-Interest (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2013	Dec. 30, 2012	Jan. 01, 2012
1% Sr. Convertible Notes due 2013 [Member]
Interest Cost Recognized For Convertible Notes
Contractual interest coupon	$ 3,481	$ 9,280	$ 10,692
Amortization of bond issuance costs	1,013	2,783	4,345
Amortization of bond discount	21,022	53,599	56,424
Total interest cost recognized	25,516	65,662	71,461
1.5% Sr. Convertible Notes due 2017 [Member]
Interest Cost Recognized For Convertible Notes
Contractual interest coupon	15,000	15,000	15,000
Amortization of bond issuance costs	2,667	2,666	2,695
Amortization of bond discount	39,095	36,364	34,140
Total interest cost recognized	56,762	54,030	51,835
0.5% Sr. Convertible Notes due 2020 [Member]
Interest Cost Recognized For Convertible Notes
Contractual interest coupon	1,271
Amortization of bond issuance costs	439
Amortization of bond discount	7,486
Total interest cost recognized	$ 9,196