CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash Flows From Operating Activities
Net loss	$ (183,949)	$ (193,381)	$ (260,309)
Adjustments to reconcile net loss to cash provided by operating activities:
Depreciation and amortization expense	135,820	102,335	66,607
Non-cash operating lease costs	44,792	36,332	25,091
Amortization of deferred contract acquisition costs	61,374	45,115	29,267
Stock-based compensation expense	273,989	202,777	90,137
Amortization of debt discount and issuance costs	4,519	4,659	46,174
Net accretion of discounts and amortization of premiums on available-for-sale securities	(44,441)	(263)	8,357
Deferred income taxes	2,264	(140)	8,738
Provision for bad debt	13,637	4,828	3,804
Loss on extinguishment of debt	50,300	0	72,234
Exchange of convertible senior notes attributable to the accreted interest related to debt discount		0	(29,353)
Other	829	629	511
Changes in operating assets and liabilities, net of effect of acquisitions:
Accounts receivable, net	(113,361)	(56,195)	(35,848)
Contract assets	(2,749)	(2,213)	(2,541)
Deferred contract acquisition costs	(101,465)	(67,940)	(55,411)
Prepaid expenses and other current assets	(22,125)	(7,701)	(2,395)
Other noncurrent assets	1,018	(539)	1,534
Accounts payable	11,781	(9,605)	2,462
Accrued expenses and other current liabilities	25,788	(5,363)	58,897
Operating lease liabilities	(40,046)	(31,691)	(23,071)
Deferred revenue	134,473	102,204	64,390
Other noncurrent liabilities	1,958	(253)	(4,627)
Net cash provided by operating activities	254,406	123,595	64,648
Cash Flows From Investing Activities
Purchases of property and equipment	(114,396)	(143,606)	(92,986)
Capitalized internal-use software	(20,546)	(19,758)	(14,752)
Asset acquisitions and business combinations, net of cash acquired	(6,083)	(88,187)	(5,605)
Purchases of available-for-sale securities	(1,877,513)	(1,132,951)	(1,589,265)
Sales of available-for-sale securities	20,248	0	25,714
Maturities of available-for-sale securities	1,812,015	1,148,770	967,519
Other investing activities	74	36	53
Net cash used in investing activities	(186,201)	(235,696)	(709,322)
Cash Flows From Financing Activities
Gross proceeds from issuance of convertible senior notes	0	0	1,293,750
Purchases of capped calls related to convertible senior notes	0	0	(86,293)
Cash consideration paid in exchange of convertible senior debt	0	0	(370,647)
Cash paid for issuance costs on convertible senior notes	0	0	(19,797)
Repayments of convertible senior notes	(207,649)	(16,571)	0
Proceeds from the exercise of stock options	14,851	10,000	21,385
Proceeds from the early exercise of stock options	0	113	115
Repurchases of unvested common stock	(34)	(3)	(189)
Proceeds from the issuance of common stock for employee stock purchase plan	19,083	15,291	14,984
Payment of tax withholding obligation on RSU settlement	(7,953)	(2,483)	(3,634)
Payment of indemnity holdback	(10,483)	0	(2,188)
Net cash provided by (used in) financing activities	(192,185)	6,347	847,486
Net (decrease) increase in cash, cash equivalents, and restricted cash	(123,980)	(105,754)	202,812
Cash, cash equivalents, and restricted cash, beginning of period	215,204	320,958	118,146
Cash, cash equivalents, and restricted cash, end of period	91,224	215,204	320,958
Supplemental Disclosure of Cash Flow Information:
Cash paid for interest	670	1,238	3,634
Cash paid for income taxes, net of refunds	4,454	2,223	1,546
Cash paid for operating lease liabilities	40,747	28,881	22,765
Supplemental Disclosure of Non-cash Investing and Financing Activities:
Stock-based compensation capitalized for software development	6,641	5,452	3,212
Accounts payable and accrued expenses related to property and equipment additions	26,423	28,979	13,544
Vesting of early exercised stock options	1,761	2,862	3,878
Indemnity holdback consideration associated with asset acquisitions and business combinations	1,000	10,483	0
Issuance of common stock related to an acquisition	0	65,504	1,565
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	44,707	33,137	109,821
Issuance of common stock for exchange of convertible senior notes	$ 0	$ 0	$ 920,249