Stock Compensation Plans and Stock Based Compensation (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
Stock based compensation expense and allocation by cost
Stock-based compensation	$ 43,588	$ 43,460	$ 54,706
Cost of product [Member]
Stock based compensation expense and allocation by cost
Stock-based compensation	111	117	151
Cost of Services [Member]
Stock based compensation expense and allocation by cost
Stock-based compensation	2,105	2,225	3,321
Cost of maintenance [Member]
Stock based compensation expense and allocation by cost
Stock-based compensation	1,357	1,435	2,126
Marketing and sales [Member]
Stock based compensation expense and allocation by cost
Stock-based compensation	10,356	9,765	12,285
Research and development [Member]
Stock based compensation expense and allocation by cost
Stock-based compensation	18,561	18,324	26,364
General and administrative [Member]
Stock based compensation expense and allocation by cost
Stock-based compensation	$ 11,098	$ 11,594	$ 10,459