CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		12 Months Ended
		Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss		$ (41,459)	$ (43,433)	$ (144,348)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization		78,234	75,478	59,424
Stock-based compensation expense		178,974	154,292	145,988
Amortization of deferred commissions		45,866	36,053	25,922
Other		2,862	1,071	(147)
Changes in operating assets and liabilities
Accounts receivable, net		(27,224)	(18,875)	(34,304)
Prepaid expenses and other assets		(16,053)	6,348	(7,108)
Deferred commissions		(59,240)	(48,041)	(43,962)
Operating lease right-of-use assets, net		41,825	40,726	35,449
Accounts payable, accrued expenses and other liabilities		15,325	(2,824)	(5,951)
Operating lease liabilities		(47,389)	(45,725)	(35,058)
Deferred revenue		63,097	41,764	48,808
Net cash provided by operating activities		234,818	196,834	44,713
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of short-term investments		(170,000)
Purchases of property and equipment, net of proceeds from sales		(4,702)	(9,052)	(5,444)
Capitalized internal-use software costs		(5,785)	(7,438)	(7,957)
Acquisitions, net of cash acquired		(59,395)
Other		514	107	105
Net cash used in investing activities		(239,368)	(16,383)	(13,296)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repurchases of common stock		(561,571)
Proceeds from issuance of convertible debt, net of issuance costs		(478)	336,375
Purchase of capped calls related to convertible debt			(27,773)
Proceeds from borrowings, net of borrowing costs		(171)	30,000
Principal payments on borrowings			(40,000)
Payments of dividends to preferred stockholders		(9,619)
Proceeds from issuances of common stock under employee equity plans		25,373	28,856	29,390
Employee payroll taxes paid related to net settlement of restricted stock units		(57,383)	(48,761)	(43,328)
Principal payments of finance lease liabilities		(50,391)	(60,020)	(38,542)
Other		(3,701)		(936)
Net cash (used in) provided by financing activities		(172,861)	218,677	(53,416)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash		(1,212)	797	(171)
Net (decrease) increase in cash, cash equivalents, and restricted cash		(178,623)	399,925	(22,170)
Cash, cash equivalents, and restricted cash, beginning of period	[1]	595,511	195,586	217,756
Cash, cash equivalents, and restricted cash, end of period	[1]	416,888	595,511	195,586
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid for interest, net of amounts capitalized		4,690	7,481	5,549
Cash paid for income taxes, net of tax refunds		2,009	1,472	2,835
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Increase in finance lease liabilities		3,501	$ 31,282	$ 103,420
Series A Convertible Preferred Stock
CASH FLOWS FROM FINANCING ACTIVITIES:
Series A convertible preferred stock, net of issuance costs		$ 485,080

[1] Restricted cash is included in prepaid expenses and other current assets for the periods presented.