Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2021	Feb. 02, 2020	Jan. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss	$ (282,076)	$ (200,987)	$ (178,362)	[1],[2]
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	70,042	89,710	70,878
Amortization of debt discount and debt issuance costs	29,070	27,179	21,031
Stock-based compensation expense	242,344	226,705	210,645
Impairment of long-lived assets	7,505	0	0
Other	7,340	1,336	(5,039)
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable, net	410	(79,442)	(135,649)
Inventory	(8,690)	2,393	(12,289)
Deferred commissions	(48,721)	(24,231)	(27,660)
Prepaid expenses and other assets	(33,982)	(16,734)	(6,972)
Operating lease right-of-use assets	28,804	26,511	0
Accounts payable	(14,364)	(18,856)	14,293
Accrued compensation and other liabilities	76,972	20,296	51,810
Operating lease liabilities	(27,318)	(25,377)	0
Deferred revenue	140,305	161,071	161,737
Net cash provided by operating activities	187,641	189,574	164,423
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property and equipment	(94,975)	(87,847)	(100,246)
Acquisitions, net of cash acquired	(339,641)	(51,594)	(13,899)
Purchase of intangible assets	0	(9,000)	0
Purchases of marketable securities	(573,959)	(795,580)	(665,357)
Sales of marketable securities	171,530	200,251	19,878
Maturities of marketable securities	423,936	419,059	253,280
Other	(5,000)	0	(5,000)
Net cash used in investing activities	(418,109)	(324,711)	(511,344)
CASH FLOWS FROM FINANCING ACTIVITIES
Net proceeds from exercise of stock options	59,339	42,899	47,771
Proceeds from issuance of common stock under employee stock purchase plan	32,439	43,298	33,444
Proceeds from issuance of convertible senior notes, net of issuance costs	0	0	562,062
Payment for purchase of capped calls	0	0	(64,630)
Proceeds from borrowings, net of issuance costs	251,892	0	0
Repayment of debt assumed from acquisition	0	(11,555)	(6,101)
Tax withholding on vesting of equity awards	(8,258)	(10,379)	(632)
Repurchases of common stock	(135,175)	(15,017)	(20,000)
Net cash provided by financing activities	200,237	49,246	551,914
Net increase (decrease) in cash, cash equivalents and restricted cash	(30,231)	(85,891)	204,993
Cash, cash equivalents and restricted cash, beginning of year	377,922	463,813	258,820
Cash, cash equivalents and restricted cash, end of year	347,691	377,922	463,813
Cash and cash equivalents	362,635	447,990
Cash, cash equivalents and restricted cash, end of year	347,691	463,813	463,813
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Cash paid for interest	2,279	718	371
Cash paid for income taxes	10,522	4,824	4,696
Cash paid for amounts included in the measurement of lease liabilities	36,980	32,785	0
SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING INFORMATION
Property and equipment purchased but not yet paid	10,979	6,814	13,873
Operating lease right-of-use assets	57,471	14,937	0
Acquisition consideration held back to satisfy potential indemnification claims	0	0	3,725
Vesting of early exercised stock options	0	0	320
Fair value of equity awards assumed in an acquisition	$ 8,802	$ 0	$ 0

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