Annual report pursuant to Section 13 and 15(d)

Long-Term Debt - Components of Long-Term Debt (Details)

v3.8.0.1
Long-Term Debt - Components of Long-Term Debt (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Debt Instrument [Line Items]    
Principal $ 889,790 $ 873,733
Adjustments to carrying value, Debt premium, discount, issuance costs, net of amortization (3,956) (5,276)
Adjustments to carrying value, Total 102,262 146,994
Adjustments to carrying value, Current maturities 22,925 8,272
Adjustments to carrying value, less current maturities 79,337 138,722
Debt premium, discount, issuance costs, net of amortization (3,956) (5,276)
Total long-term debt 992,052 1,020,727
Long-term debt 22,925 8,272
Long term debt, less current maturities 969,127 1,012,455
11.00% 1.5 Lien Term Loan, Due November 2019    
Debt Instrument [Line Items]    
Principal 75,000 75,000
Adjustments to carrying value, Future interest payments 15,596 23,823
Adjustments to carrying value, Subtotal 15,596 23,823
Carrying Value 90,596 98,823
9.00 % Second Lien Term Loan, Due May 2020    
Debt Instrument [Line Items]    
Principal 300,000 300,000
Carrying Value 300,000 300,000
9.00%/10.75% Second Lien PIK Toggle Notes, Due May 2020    
Debt Instrument [Line Items]    
Principal 171,769 163,007
Adjustments to carrying value, Future payments-in-kind 5,745 24,048
Adjustments to carrying value, Future interest payments 34,872 36,850
Adjustments to carrying value, Subtotal 40,617 60,898
Carrying Value 212,386 223,905
8.50%/10.00% Third Lien PIK Toggle Notes, Due June 2021    
Debt Instrument [Line Items]    
Principal 153,192 145,897
Adjustments to carrying value, Future payments-in-kind 11,323 26,844
Adjustments to carrying value, Future interest payments 38,682 40,705
Adjustments to carrying value, Subtotal 50,005 67,549
Carrying Value 203,197 213,446
8.50% Unsecured Senior Notes, Due June 2019    
Debt Instrument [Line Items]    
Principal 189,829 189,829
Carrying Value $ 189,829 $ 189,829