Condensed Consolidated Income Statements (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Revenues:
Licenses	$ 87,968	$ 80,582	$ 232,334	$ 222,663
Services	132,432	112,460	379,193	327,652
Total revenues	220,400	193,042	611,527	550,315
Cost of revenues:
Licenses	2,674	2,465	7,008	6,178
Services	22,449	16,907	66,049	47,267
Amortization of purchased technology	6,291	4,105	16,190	12,564
Total cost of revenues	31,414	23,477	89,247	66,009
Gross profit	188,986	169,565	522,280	484,306
Operating expenses:
Sales and marketing	84,016	74,107	252,728	214,529
Research and development	42,905	38,124	127,745	110,140
General and administrative	27,154	21,585	83,426	60,758
Amortization of other purchased intangible assets	5,025	3,186	12,970	9,512
Total operating expenses	159,100	137,002	476,869	394,939
Income from operations	29,886	32,563	45,411	89,367
Other (expense) income, net	(5,494)	1,743	(3,651)	(5,706)
Income before income tax provision	24,392	34,306	41,760	83,661
Income tax provision	2,926	5,805	10,336	22,158
Net income	$ 21,466	$ 28,501	$ 31,424	$ 61,503
Net income per share:
Basic	$ 0.25	$ 0.31	$ 0.36	$ 0.68
Diluted	$ 0.25	$ 0.31	$ 0.35	$ 0.66
Weighted-average shares:
Basic	84,956	90,540	88,243	89,883
Diluted	86,359	93,161	90,287	92,522