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Convertible Senior Notes - Notes Due 2023 (Detail)
1 Months Ended 12 Months Ended
Jun. 30, 2018
USD ($)
D
Jan. 28, 2023
USD ($)
$ / shares
shares
Jan. 29, 2022
USD ($)
shares
Jan. 30, 2021
USD ($)
shares
Debt Instrument        
Debt instrument, conversion principal amount $ 1,000      
Debt amount settled in cash   $ 13,064,000 $ 335,729,000 $ 215,846,000
Shares acquired from notes settlement | shares   3,719,550 0 0
Debt default conditions        
Loss on extinguishment of debt   $ (169,578,000) $ (29,138,000) $ 152,000
Amortization of debt discount   0 28,816,000 $ 42,372,000
Private Offering        
Debt Instrument        
Debt instrument, principal amount $ 300,000,000      
Debt default conditions        
Debt outstanding   43,420,000 256,452,000  
Discounts upon original issuance   180,000 37,576,000  
2023 Notes        
Debt Instrument        
Debt amount settled in cash   9,400,000 $ 261,000,000  
Shares issued upon conversion | shares     958,330  
Shares acquired from notes settlement | shares     958,307  
Debt instrument, principal amount   $ 9,400,000    
Debt default conditions        
Debt instrument, convertible earliest date Mar. 15, 2023 Mar. 15, 2023    
Deemed elected combination settlement amount per note to be received upon conversion $ 1,000      
Aggregate principal amount, current   $ 1,696,000 $ 9,389,000  
Loss on extinguishment of debt     $ 19,000,000  
2023 Notes | Common Stock        
Debt Instrument        
Conversion price per share | $ / shares   $ 193.65    
Shares issued upon conversion | shares   27,234    
2023 Notes | Convertible note bond hedges        
Debt Instrument        
Shares issued upon conversion | shares     23  
2023 Notes | Convertible note bond hedges | Common Stock        
Debt Instrument        
Shares issued upon conversion | shares   26    
Shares acquired from notes settlement | shares   27,208    
2023 Notes | Private Offering        
Debt Instrument        
Debt instrument, principal amount     $ 335,000,000  
Debt instrument, interest rate 0.00%      
Debt default conditions        
Debt outstanding   $ 1,696,000 68,391,000  
Discounts upon original issuance     $ 5,999,000  
2023 Notes | Overallotment option        
Debt default conditions        
Debt outstanding $ 35,000,000      
2023 Notes | Circumstances (1)        
Debt Instrument        
Debt instrument, convertible trading days | D 20      
Debt instrument, convertible consecutive trading days | D 30      
Debt instrument, convertible percentage of stock price 130.00%      
2023 Notes | Circumstances (2)        
Debt Instrument        
Debt instrument, convertible trading days | D 5      
Debt instrument, convertible consecutive trading days | D 10      
Debt instrument, convertible percentage of stock price 98.00%