Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jul. 31, 2012		Jul. 31, 2011		Jul. 31, 2012		Jul. 31, 2011
Revenues:
Subscription and support	$ 687,493		$ 509,279		$ 1,342,713		$ 982,783
Professional services and other	44,156		36,723		84,403		67,583
Total revenues	731,649		546,002		1,427,116		1,050,366
Cost of revenues:
Subscription and support	118,519	[1],[2]	89,144	[1],[2]	227,263	[1],[2]	164,387	[1],[2]
Professional services and other	43,899	[1],[2]	31,766	[1],[2]	86,706	[1],[2]	59,589	[1],[2]
Total cost of revenues	162,418	[1],[2]	120,910	[1],[2]	313,969	[1],[2]	223,976	[1],[2]
Gross profit	569,231		425,092		1,113,147		826,390
Operating expenses:
Research and development	99,442	[1],[2]	73,393	[1],[2]	194,218	[1],[2]	138,685	[1],[2]
Marketing and sales	380,160	[1],[2]	283,001	[1],[2]	749,949	[1],[2]	537,472	[1],[2]
General and administrative	103,095	[1],[2]	84,446	[1],[2]	204,695	[1],[2]	168,784	[1],[2]
Total operating expenses	582,697	[1],[2]	440,840	[1],[2]	1,148,862	[1],[2]	844,941	[1],[2]
Loss from operations	(13,466)		(15,748)		(35,715)		(18,551)
Investment income	7,173		5,112		11,634		13,167
Interest expense	(8,033)		(3,846)		(14,403)		(7,517)
Other income (expense)	294		(3,231)		(416)		(4,031)
Loss before benefit from income taxes	(14,032)		(17,713)		(38,900)		(16,932)
Benefit from income taxes	4,203		13,445		9,596		13,194
Net loss	$ (9,829)		$ (4,268)		$ (29,304)		$ (3,738)
Basic net loss per share	$ (0.07)		$ (0.03)		$ (0.21)		$ (0.03)
Diluted net loss per share	$ (0.07)		$ (0.03)		$ (0.21)		$ (0.03)
Shares used in computing basic net loss per share	139,425		135,093		138,789		134,273
Shares used in computing diluted net loss per share	139,425		135,093		138,789		134,273

[1] Three Months Ended July 31, Six Months Ended July 31, (2) Amounts include stock-based expenses, as follows: 2012 2011 2012 2011 Cost of revenues $ 7,864 $ 4,379 $ 15,117 $ 8,030 Research and development 16,089 11,188 31,756 19,027 Marketing and sales 44,781 27,114 86,768 50,901 General and administrative 16,683 11,913 33,042 24,194

[2] (1) Amounts include amortization of purchased intangibles from Three Months Ended July 31, Six Months Ended July 31, business combinations, as follows: 2012 2011 2012 2011 Cost of revenues $ 17,668 $ 16,373 $ 35,116 $ 25,468 Marketing and sales 2,407 2,306 5,834 3,546