Quarterly report pursuant to Section 13 or 15(d)

Convertible Senior Notes - Narrative (Details)

v3.21.2
Convertible Senior Notes - Narrative (Details)
1 Months Ended 3 Months Ended 9 Months Ended
May 31, 2018
USD ($)
d
$ / shares
shares
Sep. 30, 2021
USD ($)
option
shares
Jun. 30, 2021
USD ($)
Mar. 31, 2021
USD ($)
Mar. 31, 2020
USD ($)
Sep. 30, 2021
USD ($)
option
shares
Sep. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
Debt Instrument [Line Items]                
Loss on extinguishment of debt           $ 7,303,000 $ (659,000)  
Adjustments to additional paid in capital, equity component of convertible debt   $ 32,000 $ 1,073,000 $ 9,086,000 $ 2,745,000      
Adjustments to additional paid-in-capital from warrants           500,000    
Payments to unwind warrants           18,400,000    
Proceeds from unwinding convertible bond hedges           $ 18,900,000    
Number of options under convertible bond hedges | option   598,021       598,021    
Convertible Notes | 2023 Convertible Senior Notes                
Debt Instrument [Line Items]                
Aggregate principal amount outstanding $ 750,000,000 $ 343,301,000       $ 343,301,000   $ 495,280,000
Interest rate (as a percent) 0.75%              
Proceeds from debt, net of issuance costs $ 733,100,000              
Initial conversion rate (shares per $1,000) 0.0040244              
Initial conversion price (USD per share) | $ / shares $ 248.48              
Debt issuance costs   16,900,000       16,900,000    
Debt premium   13,700,000       13,700,000    
Repurchased amount of debt instrument   $ 152,000,000       152,000,000    
Repayments of notes           156,000,000    
Accrued Interest           300,000    
Loss on extinguishment of debt           7,300,000    
Increase (decrease) in debt discount           13,700,000    
Adjustments to additional paid in capital, equity component of convertible debt           $ 10,200,000    
Warrants issued in public offering (shares) | shares 3,018,327 2,559,254       2,559,254    
Payments for convertible bond hedges $ 140,300,000              
Warrant exercise price (USD per share) | $ / shares $ 315.38              
Adjustments to additional paid-in-capital from warrants $ 90,000,000              
Convertible Notes | 2023 Convertible Senior Notes | Debt Instrument, Redemption, Period One                
Debt Instrument [Line Items]                
Threshold trading days | d 20              
Consecutive trading days | d 30              
Stock price trigger to classify convertible debt as current (as a percent) 130.00%              
Convertible Notes | 2023 Convertible Senior Notes | Debt Instrument, Redemption, Period Two                
Debt Instrument [Line Items]                
Threshold trading days | d 5              
Consecutive trading days | d 10              
Maximum threshold of debt trading price trigger (as a percent) 98.00%