Quarterly report pursuant to Section 13 or 15(d)

Debt - Convertible Notes (Details)

v3.20.2
Debt - Convertible Notes (Details) - Convertible Notes due 2025
1 Months Ended
Aug. 31, 2020
USD ($)
days
$ / shares
Sep. 30, 2020
USD ($)
Dec. 31, 2019
USD ($)
Debt Instrument [Line Items]      
Face amount $ 517,500,000 $ 517,500,000 $ 0
Interest rate 0.75%    
Redemption price 100.00%    
Stock price trigger 130.00%    
Convertible debt, trading days threshold | days 20    
Convertible debt, consecutive trading days threshold | days 30    
Convertible debt, trading days preceding redemption notice | days 5    
Conversion ratio 9.3682    
Conversion price (in dollars per share) | $ / shares $ 106.74    
Convertible notes, equity component $ 61,936,000    
Debt issuance costs 1,982,000    
Debt instrument, taxes 6,634,000    
Unaccreted discount on convertible notes $ 70,552,000 $ 69,104,000 $ 0