CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
CURRENT ASSETS:
Cash and cash equivalents	$ 247,442	$ 224,927
Marketable securities	1,162,717	1,292,532
Accounts receivable, net of allowance for credit losses of $2,267 and $2,468 as of June 30, 2021 and December 31, 2020, respectively	188,326	163,359
Deferred contract costs, current	17,612	13,638
Prepaid expenses and other current assets	26,289	23,624
Total current assets	1,642,386	1,718,080
Property and equipment, net	60,511	47,197
Operating lease assets	49,233	57,829
Goodwill	258,682	17,609
Intangible assets, net	11,743	2,069
Deferred contract costs, non-current	31,624	26,750
Restricted cash	3,662	3,784
Other assets	18,892	16,967
TOTAL ASSETS	2,076,733	1,890,285
CURRENT LIABILITIES:
Accounts payable	29,257	21,342
Accrued expenses and other current liabilities	70,524	55,351
Operating lease liabilities, current	16,626	16,326
Deferred revenue, current	264,650	204,825
Total current liabilities	381,057	297,844
Operating lease liabilities, non-current	42,448	51,433
Convertible senior notes, net	733,805	575,864
Deferred revenue, non-current	1,277	3,450
Other liabilities	5,267	4,262
Total liabilities	1,163,854	932,853
COMMITMENTS AND CONTINGENCIES (NOTE 8)
STOCKHOLDERS' EQUITY:
Additional paid-in capital	1,065,835	1,103,305
Accumulated other comprehensive income	832	2,287
Accumulated deficit	(153,791)	(148,163)
Total stockholders’ equity	912,879	957,432
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	2,076,733	1,890,285
Class A Common Stock
STOCKHOLDERS' EQUITY:
Common stock, value	2	2
Class B Common Stock
STOCKHOLDERS' EQUITY:
Common stock, value	$ 1	$ 1