Stock Compensation Plans and Stock Based Compensation (Details 3) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Jan. 03, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding as of December 28, 2013	17,475
Acquired options	20
Granted	1,312
Exercised	(4,202)
Canceled and forfeited	(729)
Options outstanding as of January 3, 2015	13,876
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted-Average Exercise Price, Options outstanding as of December 28, 2013	$ 10.06
Weighted Average Exercise Price Acquired Options	$ 0.32
Weighted-Average Exercise Price Granted	$ 13.90
Weighted-Average Exercise Price Exercised	$ 10.98
Weighted-Average Exercise Price Canceled and Forfeited	$ 18.09
Weighted-Average Exercise Price, Options outstanding as of January 3, 2015	$ 9.71
Summary of company stock option plans
Options vested as of January 3, 2015	11,425
Options vested as of, and expected to vest, after January 3, 2015	13,870
Weighted Average Exercise Price, Options vested as of January 3, 2015	$ 9.28
Weighted-Average Exercise Price, Options vested as of, and expected to vest after, January 3, 2015	$ 9.71
Weighted-Average Remaining Contractual Term, Options outstanding as of January 3, 2015	3 years 3 months 15 days
Weighted-Average Remaining Contractual Term, Options vested as of January 3, 2015	2 years 9 months 7 days
Weighted-Average Remaining Contractual Term, Options vested as of, and expected to vest after, January 3, 2015	3 years 3 months 15 days
Aggregate Intrinsic Value, Options outstanding as of January 3, 2015	$ 126,892
Aggregate Intrinsic Value, Options vested as of January 3, 2015	109,501
Aggregate Intrinsic Value, Options vested as of, and expected to vest after, January 3, 2015	$ 126,866