Annual report pursuant to Section 13 and 15(d)

Going Concern - Narrative (Details)

v3.19.1
Going Concern - Narrative (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2018
Sep. 30, 2016
Revolving Credit Facility      
Debt Instrument [Line Items]      
Line of credit $ 144,200,000 $ 144,200,000  
Springing maturity period   181 days  
Senior Notes | Senior Notes 9.125 Percent Due 2020      
Debt Instrument [Line Items]      
Principal 585,000,000 $ 585,000,000  
Term Loan | Term Loan Due September 2022      
Debt Instrument [Line Items]      
Principal 1,075,250,000 $ 1,075,250,000 $ 1,100,000,000
Springing maturity period   181 days  
Revolving Credit Facility | Revolving Credit Facility Waiver Agreement      
Debt Instrument [Line Items]      
Borrowing capacity $ 195,000,000 $ 195,000,000  
Alternate Base | Revolving Credit Facility | Revolving Credit Facility Waiver Agreement      
Debt Instrument [Line Items]      
Variable interest rate base floor 3.00%