CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2021	Oct. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss		$ (13,861)	$ (5,284)	$ (37,134)	$ (38,490)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization		20,023	19,594	59,110	56,382
Stock-based compensation expense		45,589	37,834	131,507	115,438
Amortization of deferred commissions		11,705	9,286	33,287	26,065
Other		1,614	50	2,572	53
Changes in operating assets and liabilities:
Accounts receivable, net		(20,239)	7,377	74,464	93,770
Prepaid expenses and other assets		(13,523)	(8,934)	(41,716)	(28,656)
Operating lease right-of-use assets, net		10,441	10,296	32,110	30,096
Accounts payable, accrued expenses and other liabilities		8,446	(2,719)	9,118	(12,458)
Operating lease liabilities		(11,737)	(11,940)	(36,190)	(33,420)
Deferred revenue		7,625	(10,508)	(41,481)	(69,486)
Net cash provided by operating activities		46,083	45,052	185,647	139,294
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of short-term investment		(90,000)		(140,000)
Purchases of property and equipment, net of proceeds from sales		(1,242)	(3,337)	(3,477)	(7,415)
Capitalized internal-use software costs		(1,116)	(964)	(3,501)	(6,357)
Acquisitions, net of cash acquired		(2,753)		(59,395)
Other		(350)		327	107
Net cash used in investing activities		(95,461)	(4,301)	(206,046)	(13,665)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repurchase of common stock		(144,172)		(428,253)
Proceeds from borrowings					30,000
Principal payments on borrowings			(20,000)		(20,000)
Proceeds from issuances of common stock under employee equity plans		9,438	8,052	23,740	28,469
Employee payroll taxes paid for net settlement of restricted stock units		(12,586)	(10,776)	(43,677)	(38,220)
Principal payments of finance lease liabilities		(12,297)	(14,584)	(38,182)	(46,159)
Other		(293)		(4,194)
Net cash used in financing activities		(161,605)	(37,308)	(5,463)	(45,910)
Effect of exchange rate changes on cash, cash equivalents, and restricted cash		(369)	(49)	(789)	488
Net (decrease) increase in cash, cash equivalents, and restricted cash		(211,352)	3,394	(26,651)	80,207
Cash, cash equivalents, and restricted cash, beginning of period	[1]	780,212	272,399	595,511	195,586
Cash, cash equivalents, and restricted cash, end of period	[1]	568,860	275,793	568,860	275,793
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Increase in finance lease liabilities		851	$ 6,072	2,476	$ 29,148
Series A Convertible Preferred Stock
CASH FLOWS FROM FINANCING ACTIVITIES:
Series A convertible preferred stock, net of issuance costs		$ (1,695)		$ 485,103

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