Condensed Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 135,542	$ 146,569
Marketable securities	196,697	127,305
Trade and other receivables, net	10,508	10,220
Deferred tax assets, net	48,808	21,243
Prepaid expenses and other current assets	8,862	7,841
Total current assets	400,417	313,178
Property and equipment, net	25,973	24,204
Goodwill	172,139	159,342
Intangible assets, net	32,064	38,315
Deferred tax assets, net – non-current	22,713	22,494
Other non-current assets	9,593	5,783
Total assets	662,899	563,316
Current liabilities:
Accounts payable	13,362	11,543
Accrued expenses and other liabilities	184,166	67,025
Deferred revenue	170,835	145,206
Total current liabilities	368,363	223,774
Other non-current liabilities	6,970	6,706
Total liabilities	$ 375,333	$ 230,480
Commitments and contingencies
Stockholders’ equity:
Common stock, $0.001 par value, 300,000,000 authorized at September 30, 2015 and December 31, 2014; 95,486,687 and 93,944,742 shares issued and 95,441,078 and 93,899,968 outstanding at September 30, 2015 and December 31, 2014, respectively	$ 95	$ 94
Preferred stock, $0.001 par value, 10,000,000 shares authorized and no shares issued and outstanding at September 30, 2015 and December 31, 2014	0	0
Additional paid-in capital	524,385	495,912
Accumulated other comprehensive loss	(77)	(116)
Accumulated deficit	(236,837)	(163,054)
Total stockholders’ equity	287,566	332,836
Total liabilities and stockholders’ equity	$ 662,899	$ 563,316