Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Revenue:
License software	$ 20,842	$ 21,265
Subscription and maintenance support	15,185	12,373
Professional services and other	3,598	4,705
Total revenue	39,625	38,343
Cost of revenue:
License software	2,460	2,221
Subscription and maintenance support	4,613	3,388
Professional services and other	2,693	2,463
Total cost of revenue	9,766	8,072
Gross profit	29,859	30,271
Operating expenses:
Sales and marketing	13,729	11,072
Research and development	12,368	8,476
General and administrative	7,519	5,814
Total operating expenses	33,616	25,362
(Loss) Income from operations	(3,757)	4,909
Other expense (income):
Interest income	(114)	(117)
Interest expense	1,789	1,696
Total other expense, net	1,675	1,579
(Loss) Income before income taxes	(5,432)	3,330
(Benefit from) provision for income taxes	(3,115)	1,629
Net (loss) income	(2,317)	1,701
Net (loss) income per common share
Basic	$ (0.08)	$ 0.06
Diluted	$ (0.08)	$ 0.06
Weighted average common shares outstanding:
Basic	27,974	27,235
Diluted	27,974	28,234
Stock-based compensation expense included above:
Stock-based compensation expense	8,544	3,191
Cost of revenue [Member]
Stock-based compensation expense included above:
Stock-based compensation expense	997	408
Sales and marketing [Member]
Stock-based compensation expense included above:
Stock-based compensation expense	2,758	1,137
Research and development [Member]
Stock-based compensation expense included above:
Stock-based compensation expense	2,878	799
General and administrative [Member]
Stock-based compensation expense included above:
Stock-based compensation expense	$ 1,911	$ 847