Annual report pursuant to Section 13 and 15(d)

Borrowings (Second Lien Notes and Warrants) (Details)

v3.20.4
Borrowings (Second Lien Notes and Warrants) (Details) - USD ($)
Sep. 30, 2020
Dec. 31, 2020
May 07, 2020
Oct. 03, 2016
Debt Instrument, Redemption [Line Items]        
Warrants, term 5 years      
Exercise price of warrants (in usd per share) $ 5.60      
Consideration $ 294,000,000.0      
Minimum        
Debt Instrument, Redemption [Line Items]        
Outstanding principal amount of issuance   $ 100,000,000.0   $ 100,000,000.0
Common Stock        
Debt Instrument, Redemption [Line Items]        
Warrants issued (in shares) 7,300,000      
9.00% Second Lien Notes        
Debt Instrument, Redemption [Line Items]        
Debt instrument principal amount $ 300,000,000.0 $ 300,000,000.0 $ 400,000,000.0  
Debt instrument, interest rate, stated (as a percent) 9.00% 9.00%    
New Credit Facility        
Debt Instrument, Redemption [Line Items]        
Extinguishment of debt, amount $ 288,600,000      
Second Lien Notes        
Debt Instrument, Redemption [Line Items]        
Warrants, term   91 days    
Number of days to closing date of equity offerings 180 days      
Second Lien Notes | Prior to July 1, 2021, a Redemption of up to 35% of the Principal        
Debt Instrument, Redemption [Line Items]        
Debt instrument redemption price percent (as a percent) 109.00%      
Second Lien Notes | Prior to July 1, 2021, a Redemption of All or Part of the Principal        
Debt Instrument, Redemption [Line Items]        
Debt instrument redemption price percent (as a percent) 100.00%      
Second Lien Notes | On or After July 1, 2021, but Before July 1, 2022        
Debt Instrument, Redemption [Line Items]        
Debt instrument redemption price percent (as a percent) 105.00%      
Second Lien Notes | On or After July 1, 2023, but Before July 1, 2024        
Debt Instrument, Redemption [Line Items]        
Debt instrument redemption price percent (as a percent) 101.00%      
Second Lien Notes | Minimum        
Debt Instrument, Redemption [Line Items]        
Outstanding principal amount of issuance   $ 100,000,000.0    
Second Lien Notes | Maximum | Prior to July 1, 2021, a Redemption of up to 35% of the Principal        
Debt Instrument, Redemption [Line Items]        
Percentage of principal amount redeemed 35.00%      
Second Lien Notes | Maximum | Prior to July 1, 2021, a Redemption of All or Part of the Principal        
Debt Instrument, Redemption [Line Items]        
Redemption principal amount percentage (as a percent) 65.00%      
6.375% Senior Notes due 2026        
Debt Instrument, Redemption [Line Items]        
Debt instrument, interest rate, stated (as a percent)   6.375%