Financing Arrangements-Interest (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Jan. 03, 2016	Dec. 28, 2014	Dec. 29, 2013
1.5% Sr. Convertible Notes due 2017 [Member]
Interest Cost Recognized For Convertible Notes
Contractual interest coupon	$ 14,952	$ 14,984	$ 15,000
Amortization of bond discount	45,865	41,848	39,095
Amortization of bond issuance costs	2,658	2,666	2,667
Total interest cost recognized	63,475	59,498	56,762
0.5% Sr. Convertible Notes due 2020 [Member]
Interest Cost Recognized For Convertible Notes
Contractual interest coupon	7,500	7,500	1,271
Amortization of bond discount	46,776	43,527	7,486
Amortization of bond issuance costs	2,509	2,551	439
Total interest cost recognized	$ 56,785	$ 53,578	$ 9,196