Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 210,177	$ 372,870
Short-term investments	182,002	308,506
Accounts receivable, net of allowance of $0 at June 30, 2018 and December 31, 2017	99,970	103,677
Restricted cash	10,006	12,807
Prepaid expenses	27,239	24,253
Other current assets	11,736	8,837
Total current assets	541,130	830,950
Goodwill	949,258	730,464
Intangible assets, net	137,172	64,258
Property and equipment, net	264,245	266,589
Restricted cash	25,000	20,000
Prepaid expenses	21,794	23,821
Other non-current assets	47,274	43,251
Total assets	1,985,873	1,979,333
Current liabilities:
Accounts payable	11,628	18,938
Income tax payable	1,914	6,677
Deferred revenue	156,316	134,007
Other current liabilities	99,825	123,089
Total current liabilities	269,683	282,711
Deferred revenue	2,359	568
Deferred tax liabilities, net	20,998	5,902
Other non-current liabilities	93,239	48,912
Total liabilities	386,279	338,093
Stockholders’ equity:
Common stock, $0.00000625 par value, and additional paid in capital - authorized shares: 2,020,517; shares outstanding: 860,181 shares (Class A) as of June 30, 2018 and 870,660 (Class A, 783,376, Class B, 66,767, Class C, 20,517) as of December 31, 2017	3,462,142	3,426,505
Accumulated other comprehensive income (loss)	(100,111)	(93,497)
Accumulated deficit	(1,762,437)	(1,691,768)
Total stockholders’ equity	1,599,594	1,641,240
Total liabilities and stockholders’ equity	$ 1,985,873	$ 1,979,333