Consolidated Statements Of Operations (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Revenue
Net revenue	$ 353,294		$ 243,826		$ 225,626
Operating expenses :
Cost of revenue	198,446	[1]	128,468	[1]	116,926	[1]
Product development	14,741	[1]	13,386	[1]	13,994	[1]
Selling, general and administrative	125,869	[1]	101,317	[1]	105,656	[1]
Total operating expenses	339,056		243,171		236,576
Income (loss) from operations	14,238		655		(10,950)
Interest income	331		525		1,081
Interest expense	(927)		(175)		(221)
Other income, net	1,360		1,177		844
Gain on sale of subsidiary (Note 8)	47,321
Realized gain on securities (Note 3)	409		582		1,393
Income (loss) before benefit from (provision for) income taxes	62,732		2,764		(7,853)
Benefit from (provision for) income taxes, net	2,403		(30,597)		3,519
Net income (loss)	$ 65,135		$ (27,833)		$ (4,334)
Basic net income (loss) per share applicable to common stockholders	$ 1.58		$ (0.69)		$ (0.11)
Diluted net income (loss) per share applicable to common stockholders	$ 1.53		$ (0.69)		$ (0.11)
Weighted average common stock outstanding (basic)	41,269,767		40,322,939		39,524,544
Weighted average common stock outstanding (diluted)	42,526,623		40,322,939		39,524,544

[1] Stock-based compensation expense recorded was classified as follows: