Consolidated Statements of Operations (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	$ 276,989	$ 245,318	$ 552,942	$ 485,347
Costs and operating expenses:
Cost of revenues	89,647	71,840	178,715	139,314
Research and development	11,006	13,577	23,600	26,756
Sales and marketing	52,837	55,203	106,202	104,871
General and administrative	45,975	43,707	89,876	83,257
Amortization of other intangible assets	4,292	4,152	8,569	8,260
Total costs and operating expenses	203,757	188,479	406,962	362,458
Income from operations	73,232	56,839	145,980	122,889
Interest income	3,021	3,262	5,972	6,512
Interest expense	0	(618)	0	(1,327)
Other (expense) income, net	(107)	122	(1,142)	47
Gain on investments, net	75	127	84	248
Loss on early extinguishment of debt	0	(294)	0	(294)
Income before provision for income taxes	76,221	59,438	150,894	128,075
Provision for income taxes	28,300	21,315	52,356	49,074
Net income	$ 47,921	$ 38,123	$ 98,538	$ 79,001
Net income per weighted average share:
Basic	$ 0.26	$ 0.22	$ 0.53	$ 0.46
Diluted	$ 0.25	$ 0.20	$ 0.52	$ 0.42
Shares used in per share calculations:
Basic	186,612	173,317	186,731	172,209
Diluted	190,179	190,479	190,781	189,746