XML 64 R52.htm IDEA: XBRL DOCUMENT v3.21.2
Convertible Senior Notes - $350 million 0.00% Convertible Senior Notes due 2024 (Detail)
1 Months Ended 3 Months Ended 6 Months Ended
Sep. 30, 2019
USD ($)
D
$ / shares
Oct. 30, 2021
USD ($)
Jul. 31, 2021
USD ($)
$ / shares
Aug. 01, 2020
USD ($)
Jul. 31, 2021
USD ($)
$ / shares
Aug. 01, 2020
USD ($)
Jan. 30, 2021
USD ($)
Debt default conditions              
Amortization of debt discount         $ 17,461,000 $ 25,378,000  
Debt amount settled in cash and common stock         28,111,000 215,846,000  
Trading days used to determine the conversion value     45 days        
Convertible senior notes due 2024              
Debt Instrument              
Debt instrument, issuance date Sep. 30, 2019            
Debt instrument, principal amount $ 350,000,000   $ 350,000,000   $ 350,000,000   $ 350,000,000
Debt instrument, maturity date Sep. 15, 2024            
Debt default conditions              
Events of default and acceleration of maturity description Certain events are also considered “events of default” under the 2024 Notes, which may result in the acceleration of the maturity of the 2024 Notes, as described in the indenture governing the 2024 Notes. Events of default under the indenture for the 2024 Notes include, among other things, the occurrence of an event of default by us as defined under any mortgage, indenture or instrument under which there may be issued, or by which there may be secured or evidenced, any indebtedness of the Company or any of its significant subsidiaries for money borrowed, if that event of default (i) constitutes the failure to pay when due indebtedness in the aggregate principal amount in excess of $20 million and (ii) such event of default continues for a period of 30 days after written notice is delivered to the Company by the Trustee or to the Company and the Trustee by the holders of at least 25% of the aggregate principal amount of the 2024 Notes then outstanding.            
Debt instrument, conversion description The initial conversion rate applicable to the 2024 Notes is 4.7304 shares of common stock per $1,000 principal amount of 2024 Notes, or a total of approximately 1.656 million shares for the total $350 million principal amount. This initial conversion rate is equivalent to an initial conversion price of approximately $211.40 per share, which represents a 25% premium to the $169.12 closing share price on the day the 2024 Notes were priced.            
Debt default, failure to pay due indebtedness, threshold amount $ 20,000,000            
Debt default, failure to pay due indebtedness, threshold period 30 days            
Percentage of aggregate principal amount of notes outstanding 25.00%            
Debt instrument, initial conversion rate         100    
Debt instrument, conversion principal amount $ 1,000            
Debt instrument, total conversion rate 1,656,000            
Debt instrument, convertible earliest date Jun. 15, 2024            
Premium on stock trigger price 25.00%            
Debt instrument, convertible, stock price trigger | $ / shares $ 169.12            
Debt instrument, effective interest rate 5.74%            
Discounts upon original issuance $ 3,500,000            
Third party offering costs $ 1,300,000            
Amortization of debt issuance costs     100,000 $ 100,000 $ 300,000 300,000  
Amortization of debt discount     4,200,000 $ 3,900,000 8,300,000 $ 7,800,000  
Convertible debt expected to be settled in cash and common stock     $ 67,000,000.0        
Trading days used to determine the conversion value     45 days        
Outstanding principal balance reclassified to current liabilities     $ 67,000,000.0   67,000,000.0   67,000,000.0
Equity component     87,252,000   87,252,000   87,252,000
Equity component reclassified to mezzanine equity from permanent equity     $ 11,000,000.0   $ 11,000,000.0   $ 11,000,000.0
Convertible senior notes due 2024 | Scenario, Plan              
Debt default conditions              
Debt amount settled in cash and common stock   $ 67,000,000.0          
Convertible debt expected to be settled in cash and common stock   $ 67,000,000.0          
Convertible senior notes due 2024 | Common Stock              
Debt default conditions              
Debt instrument, initial conversion rate 4.7304            
Conversion price per share | $ / shares $ 211.40   $ 211.40   $ 211.40    
Convertible senior notes due 2024 | Convertible debt instrument conversion period one              
Debt default conditions              
Debt instrument, convertible trading days | D 20            
Debt instrument, convertible consecutive trading days | D 30            
Debt instrument, convertible percentage of stock price 130.00%            
Convertible senior notes due 2024 | Convertible debt instrument conversion period two              
Debt default conditions              
Debt instrument, convertible trading days | D 5            
Debt instrument, convertible consecutive trading days | D 10            
Debt instrument, convertible percentage of stock price 98.00%            
Private Offering | Convertible senior notes due 2024              
Debt Instrument              
Debt instrument, principal amount $ 350,000,000            
Debt instrument, interest rate 0.00%