CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities
Net loss	$ (162,028)	$ (107,372)
Adjustments to reconcile net loss to net cash provided by operating activities
Depreciation and amortization	19,657	18,623
Share-based compensation	137,297	109,068
Amortization of deferred costs	42,044	30,942
Amortization of debt discount and issuance costs	2,446	25,219
Real estate impairments	24,908	0
Allowance for credit losses on accounts receivable	3,977	4,495
Other, net	4,565	123
Changes in operating assets and liabilities:
Accounts receivable	8,680	(11,498)
Prepaid expenses and other current assets	(8,998)	(1,739)
Deferred costs	(56,963)	(53,251)
Lease right-of-use assets	8,588	8,818
Other assets and liabilities	(979)	(1,850)
Accounts payable	22,156	5,377
Accrued liabilities	1,327	(2,561)
Accrued compensation and related benefits	(28,905)	(5,961)
Deferred revenue	52,183	59,139
Lease liabilities	(9,718)	(17,099)
Net cash provided by operating activities	60,237	60,473
Cash flows from investing activities
Purchases of property and equipment	(12,850)	(5,957)
Internal-use software development costs	(5,896)	(7,538)
Purchases of marketable securities	(364,788)	(504,850)
Proceeds from maturities of marketable securities	265,659	380,608
Proceeds from sales of marketable securities	114,610	57,061
Purchases of strategic investments	(1,000)	0
Net cash used in investing activities	(4,265)	(80,676)
Cash flows from financing activities
Proceeds from exercises of employee stock options	12,231	15,135
Proceeds from employee stock purchase plan	28,035	26,778
Taxes paid related to net share settlement of share-based awards	(3,957)	(6,302)
Net cash provided by financing activities	36,309	35,611
Effect of exchange rate changes on cash, cash equivalents and restricted cash	63	(19)
Net increase in cash, cash equivalents and restricted cash	92,344	15,389
Cash, cash equivalents and restricted cash at beginning of period	477,350	407,859
Cash, cash equivalents and restricted cash at end of period	569,694	423,248
Reconciliation of cash, cash equivalents and restricted cash to condensed consolidated balance sheets
Cash and cash equivalents	567,980	422,810
Restricted cash included in prepaid expenses and other current assets	1,714	433
Restricted cash included in other assets	0	5
Total cash, cash equivalents and restricted cash	569,694	423,248
Supplemental cash flow data
Cash paid for interest	3,780	3,780
Cash paid for taxes	6,125	5,496
Non-cash investing and financing activities
Balance of property and equipment in accounts payable and accrued expenses	3,098	1,315
Property and equipment acquired through tenant improvement allowances	1,208	0
Internal-use software development costs
Non-cash investing and financing activities
Share-based compensation capitalized in internal-use software development costs and in deferred costs	815	916
Deferred costs
Non-cash investing and financing activities
Share-based compensation capitalized in internal-use software development costs and in deferred costs	$ 1,247	$ 1,329