Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 27,338	$ 58,138
Restricted cash	545	30
Marketable securities	32,962	41,558
Accounts receivable, net	16,326	13,043
Prepaid expenses and other current assets	2,566	2,072
Deferred tax assets	1,192	1,204
Total current assets	80,929	116,045
Property and equipment, net	67,560	42,411
Goodwill	42,431	26,744
Intangible assets, net	23,413	10,594
Deferred tax assets		4,256
Other assets	1,210	2,482
Total assets	215,543	202,532
Current liabilities:
Accounts payable	11,642	4,990
Accrued expenses and other liabilities	16,382	10,977
Deferred revenue	19,292	17,329
Current portion of capital leases	526	42
Total current liabilities	47,842	33,338
Deferred revenue, net of current portion	21,591	24,123
Long-term portion of capital leases	473	136
Deferred tax liabilities	3,369
Other liabilities	1,660	436
Total liabilities	74,935	58,033
Commitments and contingencies (Note 12)
Stockholders' equity:
Preferred stock, $0.0001 par value; 5,000 shares authorized; no shares issued and outstanding
Common stock, $0.0001 par value; 100,000 shares authorized; 35,226 and 35,483 shares issued and outstanding for 2013 and 2012, respectively	4	4
Additional paid-in capital	182,927	178,219
Accumulated deficit	(43,188)	(34,547)
Total common stockholders' equity	139,743	143,676
Non-controlling interests	865	823
Total stockholders' equity	140,608	144,499
Total liabilities and stockholders' equity	$ 215,543	$ 202,532