Consolidated Statements Of Operations (USD $) In Thousands, except Share data	3 Months Ended				6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010		Jun. 30, 2011		Jun. 30, 2010
Revenue:
Net revenue	$ 89,051		$ 61,907		$ 166,242		$ 118,692
Operating expenses:
Cost of revenue	49,040	[1]	31,265	[1]	91,906	[1]	61,982	[1]
Product development	3,500	[1]	3,339	[1]	7,242	[1]	6,937	[1]
Selling, general and administrative	30,633	[1]	27,260	[1]	62,234	[1]	54,668	[1]
Total operating expenses	83,173		61,864		161,382		123,587
Income (loss) from operations	5,878		43		4,860		(4,895)
Interest income	84		123		188		249
Interest expense	(212)		(60)		(244)		(119)
Other income	92		276		266		900
Realized gain on securities	409				409		582
Income (loss) before (provision for) benefit from income taxes	6,251		382		5,479		(3,283)
(Provision for) benefit from income taxes, net	(4,085)		(499)		21,415		715
Net income (loss)	$ 2,166		$ (117)		$ 26,894		$ (2,568)
Basic net income (loss) per share	$ 0.05		$ 0.00		$ 0.66		$ (0.06)
Diluted net income (loss) per share	$ 0.05		$ 0.00		$ 0.64		$ (0.06)
Weighted average common stock outstanding (basic)	41,202,939		40,271,983		41,035,681		40,182,567
Weighted average common stock outstanding (diluted)	42,550,398		40,271,983		42,279,986		40,182,567

[1] (1) Stock-based compensation expense recorded for the three and six months ended June 30, 2011 and 2010 was classified as follows (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2011 2010 2011 2010 Cost of revenue $ 425 $ 438 $ 852 $ 841 Product development 187 156 372 307 Selling, general and administrative 2,414 2,493 4,744 4,681