Annual report pursuant to Section 13 and 15(d)

Long-Term Debt - Additional Information (Details)

v3.8.0.1
Long-Term Debt - Additional Information (Details) - USD ($)
$ / shares in Units, shares in Millions
1 Months Ended 3 Months Ended 4 Months Ended 12 Months Ended 16 Months Ended
Sep. 07, 2016
May 31, 2015
Sep. 30, 2016
Dec. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2017
Jun. 30, 2017
Debt Instrument [Line Items]                  
Aggregate annual maturities of long-term debt, 2018         $ 22,900,000     $ 22,900,000  
Aggregate annual maturities of long-term debt, 2019         302,100,000     302,100,000  
Aggregate annual maturities of long-term debt, 2020         499,500,000     499,500,000  
Aggregate annual maturities of long-term debt, 2021         171,500,000     171,500,000  
Debt instrument aggregate principle amount       $ 873,733,000 889,790,000 $ 873,733,000   889,790,000  
Gain on exchange of debt     $ 123,900,000   $ 7,811,000 123,923,000      
Credit agreement expiration date         Nov. 08, 2018        
Revolving bank credit facility borrowings outstanding         $ 0     0  
Write-offs of debt issuance costs           $ 1,400,000 $ 3,200,000    
Revolving Bank Credit Facility                  
Debt Instrument [Line Items]                  
Revolving bank credit facility borrowing base         $ 150,000,000     150,000,000  
Borrowings and letters of credit, repayment terms         To the extent borrowings and letters of credit outstanding exceed the redetermined borrowing base, such excess or deficiency is required to be repaid within 90 days in three equal monthly payments.        
Revolving bank credit facility maximum lender commitment         $ 150,000,000     150,000,000  
Percentage of hedging contracts           75.00%      
Debt redemption amount       35,000,000   $ 35,000,000      
Letter of credit maximum amount outstanding prior to repurchase of term loan       5,000,000   5,000,000      
Consolidated Cash balance       35,000,000   35,000,000      
First lien leverage ratio         200.00%        
Current ratio         280.00%        
Revolving bank credit facility borrowings outstanding       0 $ 0 0   0  
Outstanding balances on the revolving bank credit facility (including letters of credit)         $ 5,000,000     5,000,000  
Revolving bank credit facility interest rate description         Borrowings under the revolving bank credit facility bear interest at the applicable London Interbank Offered Rate (“LIBOR”) plus a margin that varies from 3.00% to 4.00% depending on the level of total borrowings under the Credit Agreement, or an alternative base rate equal to the greater of (a) Prime Rate, (b) Federal Funds Rate plus 0.50%, or (c) LIBOR plus 1.0%, plus applicable margin ranging from 2.00% to 3.00%.        
Unused portion of the borrowing base commitment fee         0.50%        
Write-offs of debt issuance costs           1,400,000 $ 3,200,000    
Letters of credit outstanding       500,000 $ 300,000 500,000   300,000  
Revolving Bank Credit Facility | London Interbank Offered Rate (LIBOR)                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate         1.00%        
Revolving Bank Credit Facility | Federal Funds Effective Swap Rate                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate         0.50%        
Revolving Bank Credit Facility | Scenario Covenants                  
Debt Instrument [Line Items]                  
Maximum unrestricted cash balance if revolver balance is above $5 million         $ 35,000,000     35,000,000  
Minimum | Revolving Bank Credit Facility                  
Debt Instrument [Line Items]                  
Current ratio         100.00%        
Minimum | Revolving Bank Credit Facility | London Interbank Offered Rate (LIBOR)                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate         3.00%        
Minimum | Revolving Bank Credit Facility | London Interbank Offered Rate Additional Applicable Margin                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate         2.00%        
Maximum | Revolving Bank Credit Facility | London Interbank Offered Rate (LIBOR)                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate         4.00%        
Maximum | Revolving Bank Credit Facility | London Interbank Offered Rate Additional Applicable Margin                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate         3.00%        
9.00%/10.75% Second Lien PIK Toggle Notes, Due May 2020                  
Debt Instrument [Line Items]                  
Debt instrument aggregate principle amount       $ 163,007,000 $ 171,769,000 $ 163,007,000   $ 171,769,000  
Debt instrument maturity date         May 15, 2020 May 15, 2020      
Debt instrument interest rate 9.00%     9.00% 9.00% 9.00%   9.00%  
Debt instrument paid in kind interest rate       10.75% 10.75% 10.75%   10.75%  
Debt instrument payment terms         Cash interest accrues at 9.00% per annum and is payable on May 15 and November 15 of each year. The Second Lien PIK Toggle Notes contain payment-in-kind interest provisions, where certain semi-annual interest is added to the principal amount instead of being paid in cash in the then current semi-annual period. This payment-in-kind provision expires on March 7, 2018. For the initial interest payment on November 15, 2016, interest could only be paid-in-kind at 10.75% per annum.        
Debt instrument stated interest rate percentage for payment-in-kind         10.75%     10.75%  
9.00%/10.75% Second Lien PIK Toggle Notes, Due May 2020 | Minimum                  
Debt Instrument [Line Items]                  
Cash interest payable stub period         Mar. 07, 2018        
9.00%/10.75% Second Lien PIK Toggle Notes, Due May 2020 | Maximum                  
Debt Instrument [Line Items]                  
Cash interest payable stub period         May 15, 2018        
8.50%/10.00% Third Lien PIK Toggle Notes, Due June 2021                  
Debt Instrument [Line Items]                  
Debt instrument aggregate principle amount       $ 145,897,000 $ 153,192,000 $ 145,897,000   $ 153,192,000  
Debt instrument maturity date         Jun. 15, 2021 Jun. 15, 2021      
Debt instrument interest rate 8.50%     8.50% 8.50% 8.50%   8.50%  
Debt instrument paid in kind interest rate       10.00% 10.00% 10.00%   10.00%  
Debt instrument payment terms         The maturity date will accelerate to February 28, 2019 if the remaining Unsecured Senior Notes have not been extended, renewed, refunded, defeased, discharged, replaced or refinanced by February 28, 2019. Certain amendments under the 1.5 Lien Term Loan and the Credit Agreement will likely be required in the event replacement financing is not utilized. Cash interest accrues at 8.50% per annum and is payable on June 15 and December 15 of each year. The Third Lien PIK Toggle Notes contain PIK interest provisions, where certain semi-annual interest is added to the principal amount instead of being paid in cash in the then current semi-annual period. This payment-in-kind provision expires on September 7, 2018. For the initial interest payment on December 15, 2016, interest could only be paid-in-kind at 10.00% per annum. For the six month interest period ending June 15, 2017, we paid the interest payment in cash rather than using the payment-in-kind provision. For the six-month period ended November 15, 2017, we exercised the payment-in-kind provision. For the six-month period ended June 15, 2018, we have exercised the payment-in-kind provision. When the PIK option is utilized, the principal amount of the notes increases.        
Debt instrument stated interest rate percentage for payment-in-kind 10.00%                
11.00% 1.5 Lien Term Loan, Due November 2019                  
Debt Instrument [Line Items]                  
Debt instrument aggregate principle amount       $ 75,000,000 $ 75,000,000 $ 75,000,000   $ 75,000,000  
Debt instrument maturity date         Nov. 15, 2019 Nov. 15, 2019      
Debt instrument interest rate       11.00% 11.00% 11.00%   11.00%  
Second Lien PIK Toggle Notes and the Third Lien PIK Toggle Notes                  
Debt Instrument [Line Items]                  
Net reduction to long term debt                 $ 8,200,000
11.00% 1.5 Lien Term Loan, Due November 2019                  
Debt Instrument [Line Items]                  
Debt instrument maturity date Nov. 15, 2019                
Debt instrument interest rate 11.00%                
Debt instrument, maturity date, description         1.5 Lien Term Loan on September 7, 2016 with a maturity date of November 15, 2019. The maturity date will accelerate to February 28, 2019 if the remaining Unsecured Senior Notes have not been extended, renewed, refunded, defeased, discharged, replaced or refinanced by February 28, 2019.        
Debt instrument payment terms         Interest accrues at 11.00% per annum and is payable quarterly in cash.        
Debt instrument frequency of interest payment in cash         quarterly        
9.00 % Second Lien Term Loan, Due May 2020                  
Debt Instrument [Line Items]                  
Debt instrument aggregate principle amount       $ 300,000,000 $ 300,000,000 $ 300,000,000   $ 300,000,000  
Debt instrument maturity date         May 15, 2020 May 15, 2020      
Debt instrument interest rate   9.00%   9.00% 9.00% 9.00%   9.00%  
Debt instrument payment terms         Interest on the Second Lien Term Loan is payable in arrears semi-annually on May 15 and November 15        
Debt instrument discount rate   1.00%              
Effective interest rate         9.60%     9.60%  
8.50% Unsecured Senior Notes, Due June 2019                  
Debt Instrument [Line Items]                  
Debt instrument aggregate principle amount       $ 189,829,000 $ 189,829,000 $ 189,829,000   $ 189,829,000  
Debt instrument maturity date         Jun. 15, 2019 Jun. 15, 2019      
Debt instrument interest rate       8.50% 8.50% 8.50%   8.50%  
Debt instrument payment terms         semi-annually in arrears on June 15 and December 15        
Effective interest rate         8.30%     8.30%  
Exchange Transaction                  
Debt Instrument [Line Items]                  
Gain on exchange of debt           $ 123,900,000      
Deal transaction costs $ 18,900,000                
Common stock issued value per share $ 1.76                
Basic and diluted income (loss) per common share         $ 0.06 $ 1.30      
Additional expense charged to gain on exchange of debt         $ 400,000        
Exchange Transaction | Common Stock                  
Debt Instrument [Line Items]                  
Debt conversion, common stock shares issued 60.4   60.4            
Exchange Transaction | 9.00%/10.75% Second Lien PIK Toggle Notes, Due May 2020                  
Debt Instrument [Line Items]                  
Debt instrument aggregate principle amount $ 159,800,000                
Debt instrument maturity date         May 15, 2020        
Exchange Transaction | 9.00%/10.75% Second Lien PIK Toggle Notes, Due May 2020 | Minimum                  
Debt Instrument [Line Items]                  
Debt instrument interest rate 9.00%                
Exchange Transaction | 9.00%/10.75% Second Lien PIK Toggle Notes, Due May 2020 | Maximum                  
Debt Instrument [Line Items]                  
Debt instrument paid in kind interest rate 10.75%                
Exchange Transaction | 8.50%/10.00% Third Lien PIK Toggle Notes, Due June 2021                  
Debt Instrument [Line Items]                  
Debt instrument aggregate principle amount $ 142,000,000                
Debt instrument maturity date           Jun. 15, 2021      
Exchange Transaction | 8.50%/10.00% Third Lien PIK Toggle Notes, Due June 2021 | Minimum                  
Debt Instrument [Line Items]                  
Debt instrument interest rate 8.50%                
Exchange Transaction | 8.50%/10.00% Third Lien PIK Toggle Notes, Due June 2021 | Maximum                  
Debt Instrument [Line Items]                  
Debt instrument paid in kind interest rate 10.00%                
Exchange Transaction | 11.00% 1.5 Lien Term Loan, Due November 2019                  
Debt Instrument [Line Items]                  
Debt instrument aggregate principle amount $ 75,000,000                
Debt instrument maturity date           Nov. 30, 2019      
Debt instrument interest rate 11.00%                
Exchange Transaction | 1.5 Lien Term Loan                  
Debt Instrument [Line Items]                  
Interest expense recorded for new debt       $ 0       $ 0  
Exchange Transaction | 8.50% Unsecured Senior Notes, Due June 2019                  
Debt Instrument [Line Items]                  
Debt instrument aggregate principle amount $ 710,200,000                
Percentage of unsecured senior notes exchanged 79.00%                
Debt instrument maturity date         Jun. 15, 2019        
Exchange Transaction | 8.50% Unsecured Senior Notes, Due June 2019 | Common Stock                  
Debt Instrument [Line Items]                  
Debt conversion, common stock shares issued 60.4