CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	[1]
Current assets:
Cash and cash equivalents	$ 609,229	$ 109,370
Marketable securities	128,751	137,576
Accounts receivable, net of allowance for doubtful accounts of $1,445 and $1,252 as of March 31, 2018 and December 31, 2017, respectively	52,738	57,096
Deferred costs	17,010	15,771
Prepaid expenses and other current assets	29,412	24,165
Total current assets	837,140	343,978
Marketable securities, noncurrent	121,754	97,447
Property and equipment, net	61,000	59,157
Deferred costs, noncurrent	16,851	15,395
Goodwill and intangible assets, net	66,316	67,034
Other assets	9,462	8,359
Total assets	1,112,523	591,370
Current liabilities:
Accounts payable	6,586	5,307
Accrued liabilities	37,633	21,876
Accrued compensation and related benefits	33,142	29,017
Deferred revenue	183,936	173,147
Total current liabilities	261,297	229,347
Convertible senior notes, net	439,953	0
Deferred revenue, noncurrent	1,334	1,213
Other liabilities	9,286	6,626
Total liabilities	711,870	237,186
Commitments and contingencies (Note 8)
Stockholders’ equity:
Preferred stock	0	0
Common stock	1,042	1,031
Additional paid-in capital	830,741	753,568
Accumulated other comprehensive loss	(3,762)	(2,372)
Accumulated deficit	(427,368)	(398,043)
Total stockholders’ equity	400,653	354,184
Total liabilities and stockholders’ equity	$ 1,112,523	$ 591,370

[1] See Note 1 for a summary of adjustments.