Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Revenues	$ 319,448	$ 275,953
Costs and operating expenses:
Cost of revenues	102,566	89,068
Research and development	17,480	12,594
Sales and marketing	67,290	53,365
General and administrative	55,706	43,901
Amortization of other intangible assets	4,767	4,277
Restructuring charge	60	0
Total costs and operating expenses	247,869	203,205
Income from operations	71,579	72,748
Interest income	1,633	2,951
Other expense, net	(441)	(1,035)
Gain on investments, net	13	9
Income before provision for income taxes	72,784	74,673
Provision for income taxes	29,557	24,056
Net income	$ 43,227	$ 50,617
Net income per weighted average share:
Basic	$ 0.24	$ 0.27
Diluted	$ 0.24	$ 0.26
Shares used in per share calculations:
Basic	178,120	186,849
Diluted	182,342	191,383