Condensed Consolidated Income Statements (USD $) In Thousands, except Per Share data	3 Months Ended			6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010		Jun. 30, 2011		Jun. 30, 2010
Revenues:
Licenses	$ 77,632	$ 77,100		$ 144,367		$ 142,081
Services	125,338	109,002		246,760		215,192
Total revenues	202,970	186,102	[1]	391,127	[1]	357,273
Cost of revenues:
Licenses	2,550	1,893		4,334		3,714
Services	22,634	15,636		43,600		30,360
Amortization of purchased technology	5,249	3,965		9,899		8,458
Total cost of revenues	30,433	21,494		57,833		42,532
Gross profit	172,537	164,608		333,294		314,741
Operating expenses:
Sales and marketing	86,983	72,082		168,713		140,422
Research and development	43,117	36,543		84,840		72,016
General and administrative	28,078	19,836		56,271		39,173
Amortization of other purchased intangible assets	4,198	3,149		7,945		6,325
Total operating expenses	162,376	131,610		317,769		257,936
Income from operations	10,161	32,998		15,525		56,805
Other income (expense), net	573	(3,843)		1,843		(7,449)
Income before income tax provision	10,734	29,155		17,368		49,356
Income tax provision	4,404	11,764		7,410		16,353
Net income	$ 6,330	$ 17,391		$ 9,958		$ 33,003
Net income per share:
Basic	$ 0.07	$ 0.19		$ 0.11		$ 0.37
Diluted	$ 0.07	$ 0.19		$ 0.11		$ 0.36
Weighted-average shares:
Basic	88,320	89,434		90,301		89,548
Diluted	90,363	91,920		92,742		92,135

[1] Includes property and equipment, net and other assets