Annual report pursuant to Section 13 and 15(d)

Long-term Debt - Redemption Rate (Details)

v3.8.0.1
Long-term Debt - Redemption Rate (Details)
12 Months Ended
Dec. 11, 2017
Dec. 31, 2017
Senior Notes | 6.75% Senior Secured Notes due 2022 | Debt Instrument, Redemption, Period One    
Debt Instrument, Redemption    
Debt instrument, redemption price percentage   103.375%
Senior Notes | 6.75% Senior Secured Notes due 2022 | Debt Instrument, Redemption, Period Two    
Debt Instrument, Redemption    
Debt instrument, redemption price percentage   101.688%
Senior Notes | 6.75% Senior Secured Notes due 2022 | Debt Instrument, Redemption, Period Three    
Debt Instrument, Redemption    
Debt instrument, redemption price percentage   100.00%
Unsecured Debt | 5.75% Senior Unsecured Notes due 2025    
Debt Instrument, Redemption    
Debt instrument, redemption price percentage 105.75% 100.00%
Unsecured Debt | 5.75% Senior Unsecured Notes due 2025 | Debt Instrument, Redemption, Period One    
Debt Instrument, Redemption    
Debt instrument, redemption price percentage   102.875%
Unsecured Debt | 5.75% Senior Unsecured Notes due 2025 | Debt Instrument, Redemption, Period Two    
Debt Instrument, Redemption    
Debt instrument, redemption price percentage   101.438%
Unsecured Debt | 5.75% Senior Unsecured Notes due 2025 | Debt Instrument, Redemption, Period Three    
Debt Instrument, Redemption    
Debt instrument, redemption price percentage   100.00%