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Long-Term Debt - Exchange Offer and Consent Solicitation (Details) - USD ($)
shares in Millions
3 Months Ended
Feb. 17, 2016
Mar. 31, 2016
Jan. 14, 2016
Dec. 31, 2015
Jul. 03, 2013
Aug. 19, 2010
Senior Notes | 10% Senior Unsecured Notes due 2017            
Debt Instrument [Line Items]            
Principal amount         $ 200,000,000 $ 150,000,000
Long-term debt $ 135,600,000          
Stated interest rate   10.00%   10.00% 10.00% 10.00%
Senior Notes | 10% Senior Secured Notes due 2021            
Debt Instrument [Line Items]            
Principal amount   $ 144,700,000        
Stated interest rate   10.00%   10.00%    
Private Exchange Offer and Consent Solicitation            
Debt Instrument [Line Items]            
Repayments of debt 53,600,000          
Private Exchange Offer and Consent Solicitation | Senior Notes | 10% Senior Unsecured Notes due 2017            
Debt Instrument [Line Items]            
Gain on extinguishment of debt 0          
Debt conversion, original debt, amount $ 214,400,000          
Debt conversion, original debt, percent of total 61.00%          
Private Exchange Offer and Consent Solicitation | Senior Notes | 10% Senior Secured Notes due 2021            
Debt Instrument [Line Items]            
Excess of future undiscounted cash flows $ 13,900,000 $ 13,600,000        
Amortization of financing costs   $ (300,000)        
Stated interest rate     10.00%      
Debt conversion, amount $ 144,700,000          
Common Stock | Private Exchange Offer and Consent Solicitation            
Debt Instrument [Line Items]            
Debt conversion, shares issued 4.3