Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 401,238	$ 412,305
Short-term investments	498,124	388,945
Accounts receivable, net	322,757	203,333
Current portion of deferred commissions	76,780	51,976
Prepaid expenses and other current assets	43,636	29,076
Total current assets	1,342,535	1,085,635
Deferred commissions, less current portion	61,990	33,016
Long-term investments	262,658	422,667
Property and equipment, net	181,620	144,714
Intangible assets, net	65,854	43,005
Goodwill	82,534	55,669
Other assets	36,576	22,346
Total assets	2,033,767	1,807,052
Current liabilities:
Accounts payable	38,080	37,369
Accrued expenses and other current liabilities	171,636	101,264
Current portion of deferred revenue	861,782	593,003
Total current liabilities	1,071,498	731,636
Deferred revenue, less current portion	33,319	10,751
Convertible senior notes, net	507,812	474,534
Other long-term liabilities	34,177	23,317
Total liabilities	1,646,806	1,240,238
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $0.001 par value; 10,000,000 shares authorized; no shares issued or outstanding	0	0
Common stock $0.001 par value; 600,000,000 shares authorized; 167,430,773 and 160,785,764 shares issued and outstanding at December 31, 2016 and 2015, respectively	167	160
Additional paid-in capital	1,405,317	1,140,545
Accumulated other comprehensive loss	(21,133)	(16,882)
Accumulated deficit	(997,390)	(557,009)
Total stockholders’ equity	386,961	566,814
Total liabilities and stockholders’ equity	$ 2,033,767	$ 1,807,052