Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating Activities:
Net loss	$ (23,159)	$ (17,716)
Adjustments to reconcile net loss to net cash and cash equivalents provided by operating activities
Depreciation and amortization	11,208	8,711
Stock-based compensation	32,423	27,463
Loss on early extinguishment of 2022 Convertible Notes	2,406
Repayment of 2022 Convertible Notes attributable to the debt discount	(9,805)
Benefit from deferred income taxes	(1,006)	(257)
Amortization of debt discount and issuance costs	6,493	5,703
Amortization (accretion) of bond discount	515	(2,154)
Unrealized currency translation	(49)	781
Changes in assets and liabilities
Accounts receivable	16,475	9,780
Prepaid expenses and other assets	2,715	(15,107)
Deferred commission expense	(6,305)	(1,523)
Right-of-use assets	10,354	5,723
Accounts payable	4,598	1,495
Accrued expenses and other liabilities	(2,429)	(5,439)
Operating lease liabilities	(9,272)	(5,281)
Deferred revenue	27,538	10,832
Net cash and cash equivalents provided by operating activities	62,700	23,011
Investing Activities:
Purchases of investments	(362,288)	(439,889)
Maturities of investments	376,918	382,875
Purchases of property and equipment	(3,967)	(11,098)
Acquisition of a business, net of cash acquired	(16,810)
Purchase of strategic investments	(1,850)
Equity method investment	(2,308)
Capitalization of software development costs	(7,341)	(4,769)
Net cash and cash equivalents used in investing activities	(17,646)	(72,881)
Financing Activities:
Proceeds from settlement of Convertible Note Hedges related to the 2022 Convertible Notes	723
Repayment of 2022 Convertible Notes attributable to the principal	(35,900)
Employee taxes paid related to the net share settlement of stock-based awards	(2,964)	(941)
Proceeds related to the issuance of common stock under stock plans	16,339	6,854
Repayments of finance lease obligations		(30)
Net cash and cash equivalents (used in) provided by financing activities	(21,802)	5,883
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(3,877)	(1,814)
Net increase in cash, cash equivalents and restricted cash	19,375	(45,801)
Cash, cash equivalents and restricted cash, beginning of period	381,152	278,515
Cash, cash equivalents and restricted cash, end of period	400,527	232,714
Supplemental cash flow disclosure:
Cash paid for income taxes	2,215	746
Right-of-use assets obtained in exchange for operating lease liabilities	1,276	6,396
Non-cash investing and financing activities:
Capital expenditures incurred but not yet paid	626	1,204
Asset retirement obligations		$ 87
2022 Convertible Notes
Non-cash investing and financing activities:
Issuance of common stock for repayment of 2022 Convertible Notes	$ 155,250