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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