Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Schedule of Fair Value of Long-Term Debt (Details)

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Fair Value Measurements - Schedule of Fair Value of Long-Term Debt (Details) - Fair Value, Inputs, Level 2 - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
11.00% 1.5 Lien Term Loan, Due November 2019    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Long-term debt, term loan fair value $ 75,000 $ 75,000
9.00 % Second Lien Term Loan, Due May 2020    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Long-term debt, term loan fair value 288,000 255,000
9.00%/10.75% Second Lien PIK Toggle Notes, Due May 2020    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Long-term debt, notes fair value 162,322 122,255
8.50%/10.00% Third Lien PIK Toggle Notes, Due June 2021    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Long-term debt, notes fair value 119,490 80,243
8.50% Unsecured Senior Notes, Due June 2019    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Long-term debt, notes fair value $ 178,439 $ 123,389