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Convertible Senior Notes - 2024 Notes-Convertible Bond Hedge and Warrant Transactions (Detail)
$ / shares in Units, $ in Thousands
1 Months Ended 2 Months Ended 12 Months Ended
Oct. 20, 2021
Sep. 30, 2019
USD ($)
$ / shares
Nov. 02, 2019
$ / shares
shares
Jan. 29, 2022
$ / shares
shares
Feb. 01, 2020
USD ($)
shares
Debt Instrument          
Debt instrument, issuance date Oct. 20, 2021        
Total cost of convertible note hedge transactions         $ 91,350
Cash proceeds from sale of warrants         $ 50,225
Convertible Bond Hedge and Warrant Transactions [Member]          
Debt Instrument          
Shares issued upon conversion | shares         167,100
Deferred tax asset   $ 23,000      
Convertible senior notes due 2024          
Debt Instrument          
Debt instrument, issuance date   Sep. 30, 2019      
Shares issued upon conversion | shares       419,182  
Conversion price per share | $ / shares   $ 211.40      
Premium on stock trigger price   25.00%      
Debt instrument, convertible, stock price trigger | $ / shares   $ 169.12 $ 169.12    
Convertible senior notes due 2024 | Convertible Bond Hedge and Warrant Transactions [Member]          
Debt Instrument          
Debt instrument, issuance date     Sep. 30, 2019    
Convertible note hedge, description       we entered into convertible note hedge transactions whereby we have the option to purchase a total of approximately 1.656 million shares of our common stock at a price of approximately $211.40 per share.  
Shares issued upon conversion | shares     1,656,000 10  
Conversion price per share | $ / shares   $ 211.40      
Convertible note hedge, number of shares   1,656      
Total cost of convertible note hedge transactions   $ 91,000      
Warrants price per share | $ / shares   $ 338.24      
Premium on stock trigger price     100.00%    
Cash proceeds from sale of warrants   $ 50,000      
Convertible senior notes due 2024 | Convertible Bond Hedge and Warrant Transactions [Member] | Maximum [Member]          
Debt Instrument          
Warrants sold to purchase common stock | shares     3,300,000    
Common Stock [Member] | Convertible senior notes due 2024          
Debt Instrument          
Conversion price per share | $ / shares       $ 211.40