Common Stock and Stockholders' Equity - Additional Information (Details) $ / shares in Units, $ in Thousands		1 Months Ended				12 Months Ended
	Nov. 02, 2020 USD ($)	Mar. 31, 2021 shares	Mar. 31, 2020 shares	Mar. 31, 2018 $ / shares shares	Sep. 30, 2016 $ / shares shares	Jan. 31, 2022 USD ($) period $ / shares shares	Jan. 31, 2021 USD ($) $ / shares shares	Jan. 31, 2020 USD ($) $ / shares
Class of Stock [Line Items]
Dividends declared | $						$ 0
Preferred stock, shares authorized (in shares)						25,000,000	25,000,000
Preferred stock, par value (in dollars per share) | $ / shares						$ 0.0001	$ 0.0001
Preferred stock, shares issued (in shares)						0	0
Preferred stock, shares outstanding (in shares)						0	0
Aggregate intrinsic value of exercised options | $						$ 172,100	$ 375,700	$ 318,200
Weighted-average grant date fair value of options granted (in dollars per share) | $ / shares						$ 0	$ 0	$ 41.81
Total grant date fair value of options vested | $						$ 3,900	$ 8,000	$ 8,600
Capping target value		4
Stock-based compensation expense | $						$ 199,895	168,850	$ 81,376
LLamasoft, Inc.
Class of Stock [Line Items]
One-time stock-based compensation expense | $	$ 27,750						27,800
Minimum
Class of Stock [Line Items]
Expected term (in years)						6 months
Maximum
Class of Stock [Line Items]
Expected term (in years)						2 years
Capitalized Software Development Costs
Class of Stock [Line Items]
Stock-based compensation capitalized in capitalized software development costs | $						$ 4,200	$ 3,200
Market-based Options
Class of Stock [Line Items]
Expected term (in years)						3 years	3 years
Options to purchase common stock
Class of Stock [Line Items]
Expected term (in years)								6 years
2016 Employee Stock Purchase Plan
Class of Stock [Line Items]
Common stock reserved for issuance (in shares)						2,326,540
Increase in number of shares reserved for issuance as percentage of outstanding shares of common stock on last day of prior fiscal year						1.00%
Increase in common stock reserved for issuance shares (in shares)						1,250,000
Duration of maximum offering period						27 months
Duration of new offering period						24 months
Number of consecutive purchase periods | period						4
Duration of consecutive purchase period						6 months
Maximum percentage of eligible compensation for participants to purchase common stock through payroll deductions						15.00%
Purchase price for each share of common stock as percentage of lower of fair market value per share on first day of applicable offering period						85.00%
Number of shares of common stock purchased (in shares)						156,810	209,306
Total unrecognized compensation cost | $						$ 15,300
Total unrecognized compensation cost, weighted-average amortization period						1 year 7 months 6 days
2016 Employee Stock Purchase Plan | Minimum
Class of Stock [Line Items]
Expected term (in years)						6 months	6 months	6 months
2016 Employee Stock Purchase Plan | Maximum
Class of Stock [Line Items]
Expected term (in years)						2 years	2 years	2 years
2016 Equity Plan | Market Based Restricted Stock Unit Awards | Chief Executive Officer
Class of Stock [Line Items]
Stock option, number of shares vested and exercisable (in shares)						320,794
2016 Equity Plan | Market-based Options | Chief Executive Officer
Class of Stock [Line Items]
Option grants (in shares)				334,742
Option grants (in dollars per share) | $ / shares				$ 48.47
Stock option vesting period				4 years
Stock option, number of shares vested and exercisable (in shares)						0
Stock-based compensation expense | $						$ 13,300	$ 6,600	$ 1,700
2016 Equity Incentive Plan
Class of Stock [Line Items]
Common stock reserved for issuance (in shares)						12,682,224
Increase in number of shares reserved for issuance as percentage of outstanding shares of common stock on last day of prior fiscal year						5.00%
2016 Equity Incentive Plan | Market Based Restricted Stock Unit Awards
Class of Stock [Line Items]
Awards granted (in shares)		109,249	100,178
Performance term		3 years	3 years			3 years
2016 Equity Incentive Plan | Market Based Restricted Stock Unit Awards | Minimum
Class of Stock [Line Items]
Options earning percentage		0.00%	0.00%
2016 Equity Incentive Plan | Market Based Restricted Stock Unit Awards | Maximum
Class of Stock [Line Items]
Options earning percentage		200.00%	200.00%
2016 Equity Incentive Plan | RSUs
Class of Stock [Line Items]
Total unrecognized compensation cost, weighted-average amortization period						2 years 8 months 12 days
Awards granted (in shares)						1,153,149
Total unrecognized compensation cost related to unvested restricted stock units | $						$ 352,000	319,600	186,300
2006 Stock Plan | Market-based Options | Chief Executive Officer
Class of Stock [Line Items]
Option grants (in shares)					544,127
Option grants (in dollars per share) | $ / shares					$ 13.04
Stock option vesting period					4 years
Stock option, number of shares vested and exercisable (in shares)						544,127
2006 Stock Plan and 2016 Equity Incentive Plan
Class of Stock [Line Items]
Total unrecognized compensation cost related to unvested stock options | $						$ 1,600	$ 4,500	$ 11,500
2006 Stock Plan and 2016 Equity Incentive Plan | Options to purchase common stock
Class of Stock [Line Items]
Total unrecognized compensation cost, weighted-average amortization period						1 year 1 month 6 days