Quarterly report pursuant to Section 13 or 15(d)

(6.5% Senior Secured Notes Due 2027) (Details)

v3.20.2
(6.5% Senior Secured Notes Due 2027) (Details) - 6.5% Convertible Senior Notes Due 2027 - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2020
May 31, 2020
Debt Instrument [Line Items]    
Face amount $ 1,200,000 $ 1,200,000
Interest rate, stated percentage 6.50% 6.50%
Debt Instrument, Redemption, Period One [Member]    
Debt Instrument [Line Items]    
Redemption price, percentage 100.00%  
Debt Instrument, Redemption, Equity Offering [Member]    
Debt Instrument [Line Items]    
Redemption price, percentage 106.50%  
Percentage of notes which may be redeemed from certain equity offerings 35.00%  
Debt Instrument, Redemption, Period Two [Member]    
Debt Instrument [Line Items]    
Redemption price, percentage 104.875%  
Redemption, Defined Changes of Control [Member]    
Debt Instrument [Line Items]    
Redemption price, percentage 101.00%