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DEBT - Convertible Senior Notes Narrative (Details)
1 Months Ended 6 Months Ended
Mar. 01, 2020
Feb. 29, 2020
USD ($)
$ / shares
Jun. 30, 2020
tradingDay
Debt Instrument [Line Items]      
Redemption percentage 100.00%    
On or after March 1, 2023      
Debt Instrument [Line Items]      
Redemption percentage     100.00%
Convertible Debt      
Debt Instrument [Line Items]      
Face amount | $   $ 600,000,000  
Interest rate   0.75%  
Initial conversion rate   7.4045  
Debt conversion amount | $   $ 1,000  
Initial conversion price (in dollars per share) | $ / shares   $ 135.05  
Debt issuance costs | $   $ (14,527,000)  
Convertible Debt | After the calendar quarter ending on June 30, 2020      
Debt Instrument [Line Items]      
Threshold percentage of stock price trigger     130.00%
Threshold trading days     20
Threshold consecutive trading days     30
Convertible Debt | Measurement Period      
Debt Instrument [Line Items]      
Threshold percentage of stock price trigger     98.00%
Threshold consecutive trading days     5
Threshold consecutive business days     5
Convertible Debt | On or after March 1, 2023      
Debt Instrument [Line Items]      
Threshold percentage of stock price trigger     130.00%
Threshold trading days     20
Threshold consecutive trading days     30