Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2021	Nov. 01, 2020
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss	$ (158,202)	$ (229,783)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	59,605	49,811
Amortization of debt discount and debt issuance costs	23,011	21,525
Stock-based compensation expense	207,763	179,755
Impairment of long-lived assets	471	7,505
Other	8,576	4,111
Changes in operating assets and liabilities, net of effects of acquisition:
Accounts receivable, net	106,788	83,220
Inventory	38	(4,724)
Deferred commissions	(20,395)	(12,885)
Prepaid expenses and other assets	(12,283)	(37,606)
Operating lease right-of-use assets	22,061	21,434
Accounts payable	(14,256)	8,566
Accrued compensation and other liabilities	(35,251)	(9,737)
Operating lease liabilities	(22,094)	(20,444)
Deferred revenue	106,054	57,860
Net cash provided by operating activities	271,886	118,608
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property and equipment	(81,217)	(73,643)
Acquisition, net of cash acquired	0	(339,806)
Purchases of marketable securities	(502,438)	(454,391)
Sales of marketable securities	146,934	132,207
Maturities of marketable securities	303,158	324,780
Other	(600)	(5,000)
Net cash used in investing activities	(134,163)	(415,853)
CASH FLOWS FROM FINANCING ACTIVITIES
Net proceeds from exercise of stock options	33,743	25,677
Proceeds from issuance of common stock under employee stock purchase plan	36,641	32,439
Proceeds from borrowings, net of issuance costs	0	251,892
Repayments of borrowing	(870)	0
Principal payments on finance lease obligations	(414)	0
Tax withholding on vesting of equity awards	(8,670)	(4,080)
Repurchases of common stock	(130,608)	(111,554)
Net cash provided by (used in) financing activities	(70,178)	194,374
Net (decrease) increase in cash, cash equivalents and restricted cash	67,545	(102,871)
Cash, cash equivalents and restricted cash, beginning of period	347,691	377,922
Cash, cash equivalents and restricted cash, end of period	415,236	275,051
CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT END OF PERIOD
Cash and cash equivalents	404,692	263,702
Restricted cash	10,544	11,349
Cash, cash equivalents and restricted cash, end of period	415,236	275,051
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Cash paid for interest	3,932	1,062
Cash paid for income taxes	10,051	8,911
Cash paid for amounts included in the measurement of operating lease liabilities	27,379	27,336
SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING INFORMATION
Property and equipment purchased but not yet paid	6,413	10,644
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	3,594	53,289
Fair value of equity awards assumed in an acquisition	$ 0	$ 8,802