Quarterly report pursuant to Section 13 or 15(d)

Convertible Senior Notes (Details)

v3.21.1
Convertible Senior Notes (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2021
USD ($)
Mar. 31, 2020
USD ($)
Mar. 31, 2017
USD ($)
Dec. 31, 2020
USD ($)
Debt Instrument, Redemption [Line Items]        
Repurchase of convertible senior notes $ 143,118 $ 0    
Convertible senior notes $ 423,337     $ 286,183
Maturity Year 2022        
Debt Instrument, Redemption [Line Items]        
Proceeds from convertible senior notes     $ 282,200  
Convertible senior notes conversion ratio 0.0632040 0.0632040    
Maturity Year 2026        
Debt Instrument, Redemption [Line Items]        
Convertible senior notes conversion ratio 0.1355014      
Convertible Debt [Member] | Maturity Year 2022        
Debt Instrument, Redemption [Line Items]        
Aggregate principal amount $ 143,800     $ 287,500
Convertible senior notes interest rate per annum 6.25%      
Repurchase of convertible senior notes $ 143,700      
Convertible Debt [Member] | Maturity Year 2026        
Debt Instrument, Redemption [Line Items]        
Aggregate principal amount 287,500      
Proceeds from convertible senior notes $ 279,900      
Convertible senior notes interest rate per annum 6.25%      
Convertible Debt [Member] | Maturity Year 2026 | Over-Allotment Option [Member]        
Debt Instrument, Redemption [Line Items]        
Aggregate principal amount $ 37,500