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Convertible Senior Notes and Related Transactions - Narrative (Details)
$ / shares in Units, shares in Millions
1 Months Ended 3 Months Ended 6 Months Ended
Apr. 30, 2019
USD ($)
$ / shares
shares
Jul. 30, 2022
USD ($)
$ / shares
shares
Jul. 31, 2021
USD ($)
$ / shares
shares
Jul. 30, 2022
USD ($)
$ / shares
shares
Jul. 31, 2021
USD ($)
$ / shares
shares
Jan. 29, 2022
USD ($)
Debt Instrument [Line Items]            
Amortization of debt discount       $ 0 $ 5,562,000  
Option to purchase, number of shares (in shares) | shares 11.6          
Conversion price of convertible senior notes (in dollars per share) | $ / shares $ 25.78          
Convertible note hedge cost $ 61,000,000          
Warrants outstanding (in shares) | shares 11.6 11.6 11.6 11.6 11.6  
Strike price of warrants (in dollars per share) | $ / shares $ 46.88 $ 46.88 $ 46.88 $ 46.88 $ 46.88  
Proceeds from issuance of warrants $ 28,100,000          
Dividend threshold for strike price adjustment (in dollars per share) | $ / shares       0.1125    
Strike price (in dollars per share) | $ / shares       $ 46.16    
Deferred tax liability in connection with debt discount   $ 0   $ 0   $ 6,200,000
Deferred tax asset in connection with convertible note hedge transactions   $ 6,900,000   $ 6,900,000   6,900,000
Senior Notes | 2.00% Convertible Senior Notes Due 2024            
Debt Instrument [Line Items]            
Interest rate 2.00%          
Convertible debt issued $ 300,000,000          
Conversion ratio 0.0387879          
Conversion price (in dollars per share) | $ / shares $ 25.78 $ 25.39   $ 25.39    
Dividend threshold for conversion rate and conversion price adjustment (in dollars per share) | $ / shares       $ 0.1125    
Amortization of debt discount   $ 0 $ 2,800,000 $ 0 $ 5,600,000  
Senior Notes | 2.00% Convertible Senior Notes Due 2024 | Level 2            
Debt Instrument [Line Items]            
Fair value of convertible senior notes   $ 301,600,000   $ 301,600,000   $ 303,100,000
Senior Notes | 2.00% Convertible Senior Notes Due 2024 | Initial Purchasers            
Debt Instrument [Line Items]            
Debt issuance costs $ 3,800,000          
Senior Notes | 2.00% Convertible Senior Notes Due 2024 | Third Party Offerers            
Debt Instrument [Line Items]            
Debt issuance costs $ 1,500,000