Quarterly report pursuant to Section 13 or 15(d)

Bankruptcy - Narrative (Details)

v3.19.2
Bankruptcy - Narrative (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Line of Credit Facility [Line Items]          
Restructuring and reorganization expense   $ 33,102,000 $ 0 $ 33,102,000 $ 0
Prepaid expense, retainer fee $ 2,250,000 2,250,000   $ 2,250,000  
Revolving Credit Facility | LIBOR          
Line of Credit Facility [Line Items]          
Unused capacity commitment fee, percentage       0.50%  
Letter of Credit          
Line of Credit Facility [Line Items]          
Borrowing capacity 1,000,000 1,000,000   $ 1,000,000  
DIP Facility | Revolving Credit Facility          
Line of Credit Facility [Line Items]          
Borrowing capacity $ 245,000,000 245,000,000   245,000,000  
Unused capacity commitment fee, percentage 0.75%        
Maturity period, after date of entry of interim DIP order, if circumstances met 45 days        
DIP Facility | Revolving Credit Facility | LIBOR          
Line of Credit Facility [Line Items]          
Variable rate basis floor 1.50%        
Spread on variable rate index 5.00%        
DIP Facility | Revolving Credit Facility | Base Rate          
Line of Credit Facility [Line Items]          
Variable rate basis floor 4.50%        
Spread on variable rate index 4.00%        
DIP Facility | Letter of Credit          
Line of Credit Facility [Line Items]          
Borrowing capacity $ 10,000,000 10,000,000   10,000,000  
Fronting fee on unused capacity, percentage 0.25%        
DIP Facility | Swingline Loan          
Line of Credit Facility [Line Items]          
Borrowing capacity $ 10,000,000 $ 10,000,000   $ 10,000,000