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Convertible Senior Notes, Net - Narrative (Details) $ / shares in Units, $ in Thousands, shares in Millions		3 Months Ended		6 Months Ended
	May 15, 2023 tradingDay	Jul. 31, 2023 USD ($) shares	Jul. 31, 2022 USD ($)	Jul. 31, 2023 USD ($) shares	Jul. 31, 2022 USD ($)	Feb. 28, 2018 $ / shares
Debt Instrument [Line Items]
Gain on early extinguishment of debt		$ 42,000	$ 0	$ 73,000	$ 0
Value of shares issuable under warrants granted (in dollars per share) | $ / shares						$ 68.06
Threshold trading days | tradingDay	80
Warrants settled (in shares) | shares		0.7		0.7
Payments for repurchase of Warrants		$ 4,000		$ 4,000	$ 0
Number of warrants outstanding (in shares) | shares		0.4		0.4
Senior Notes
Debt Instrument [Line Items]
Gain on early extinguishment of debt		$ 42,000		$ 73,000
Senior Notes | 2025 Notes
Debt Instrument [Line Items]
Debt repurchased, principal amount		142,000		508,000
Debt repurchase, cash portion		130,000		462,000
Senior Notes | 2026 Notes
Debt Instrument [Line Items]
Debt repurchased, principal amount		242,000		242,000
Debt repurchase, cash portion		$ 209,000		$ 209,000

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