CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenue	$ 137,380	$ 128,094	$ 283,293	$ 262,577
Cost of revenue	47,335	41,883	94,555	84,213
Gross profit	90,045	86,211	188,738	178,364
Operating expenses:
Sales and marketing	25,942	21,380	52,457	42,443
General and administrative	15,618	13,895	33,488	30,488
Technology	17,165	13,959	33,137	27,582
Amortization of intangible assets acquired in business combinations	3,606	3,549	8,144	7,100
Total operating expenses	62,331	52,783	127,226	107,613
Income from operations	27,714	33,428	61,512	70,751
Interest and other income (expense), net	528	(23,464)	264	(23,870)
Income before income taxes	28,242	9,964	61,776	46,881
Income tax expense	11,245	3,927	24,697	17,465
Net income from continuing operations	16,997	6,037	37,079	29,416
Discontinued operations (Note 5):
Net income from discontinued operations	0	3,552	155	6,456
Gain on sale, net of tax	669	2,286	34,895	2,286
Net income	17,666	11,875	72,129	38,158
Other comprehensive income:
Foreign currency translation	(289)	(213)	(2,192)	(3,080)
Total comprehensive income	$ 17,377	$ 11,662	$ 69,937	$ 35,078
Basic income per common share from:
Continuing operations (in dollars per share)	$ 0.26	$ 0.08	$ 0.56	$ 0.39
Discontinued operations (in dollars per share)	$ 0.01	$ 0.08	$ 0.53	$ 0.12
Basic net income per common share (in dollars per share)	$ 0.27	$ 0.16	$ 1.09	$ 0.50
Diluted income per common share from:
Continuing operations (in dollars per share)	$ 0.25	$ 0.08	$ 0.55	$ 0.38
Discontinued operations (in dollars per share)	$ 0.01	$ 0.08	$ 0.52	$ 0.11
Diluted net income per common share (in dollars per share)	$ 0.26	$ 0.15	$ 1.06	$ 0.49
Weighted-average shares used to calculate net income per common share:
Basic (in shares)	65,820	75,531	66,450	75,590
Diluted (in shares)	67,202	77,413	67,960	77,490