Stock Compensation Plans and Stock Based Compensation (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Stock based compensation expense and allocation by cost
Stock-based compensation	$ 47,561	$ 43,588	$ 43,460
Cost of product [Member]
Stock based compensation expense and allocation by cost
Stock-based compensation	99	111	117
Cost of Services [Member]
Stock based compensation expense and allocation by cost
Stock-based compensation	1,889	2,105	2,225
Cost of maintenance [Member]
Stock based compensation expense and allocation by cost
Stock-based compensation	1,218	1,357	1,435
Marketing and sales [Member]
Stock based compensation expense and allocation by cost
Stock-based compensation	10,193	10,356	9,765
Research and development [Member]
Stock based compensation expense and allocation by cost
Stock-based compensation	21,516	18,561	18,324
General and administrative [Member]
Stock based compensation expense and allocation by cost
Stock-based compensation	$ 12,646	$ 11,098	$ 11,594