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Investments - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Jul. 31, 2021	Oct. 31, 2021	Jan. 31, 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Purchase of strategic investments		$ 75,000
Luck-up agreement term		180 days
Gain on strategic investment	$ 72,800		$ 104,900
Gain on existing investment	49,600
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity securities	$ 179,918		$ 179,918	$ 0
Ownership percentage of economic interest of investee's outstanding capital stock (as a percent)	1.00%		1.00%
Equity investment	$ 93,100		$ 93,100