Quarterly report pursuant to Section 13 or 15(d)

LONG-TERM DEBT - Narrative (Details)

v3.10.0.1
LONG-TERM DEBT - Narrative (Details)
1 Months Ended 3 Months Ended 6 Months Ended
Jul. 01, 2018
May 15, 2018
USD ($)
$ / shares
shares
Apr. 16, 2018
shares
Apr. 10, 2018
$ / shares
shares
Jan. 31, 2018
USD ($)
Nov. 01, 2017
USD ($)
May 18, 2015
USD ($)
May 13, 2013
USD ($)
May 18, 2012
USD ($)
Jun. 30, 2018
USD ($)
agreement
shares
Jun. 30, 2018
USD ($)
shares
Jun. 30, 2018
USD ($)
Dec. 31, 2017
USD ($)
Line of Credit Facility [Line Items]                          
Interest rate (percent)                   8.00% 8.00% 8.00%  
Sale of stock, number of shares issued in transaction (shares) | shares     3,600,000 58,666,667                  
Sale of stock, subscription arrangement amount, maximum   $ 52,000,000     $ 40,000,000                
Sale of stock, price per share (dollars per share) | $ / shares   $ 1.5   $ 1.5                  
Number of exchange agreements | agreement                   5      
Derivative liability                   $ 72,256,065 $ 72,256,065 $ 72,256,065 $ 30,178,820
Revolving credit facility, maximum borrowing           $ 400,000,000.0              
Long-term debt, gross                   853,839,000 853,839,000 853,839,000 $ 1,000,000,000
Term Loan Credit Agreement                          
Line of Credit Facility [Line Items]                          
Interest rate (percent)           3.00%              
Revolving credit facility, maximum borrowing           $ 500,000,000              
Prepayment rate requirement (percent)           100.00%              
Outstanding balance period used for yield maintenance rate (percent)           2 years              
Term Loan Credit Agreement | Minimum                          
Line of Credit Facility [Line Items]                          
Line of credit facility, covenant compliance, cash to debt ratio           1.3              
Line of credit facility, covenant compliance, cash and cash equivalents including undrawn credit commitments threshold           $ 20,000,000              
Term Loan Credit Agreement | Maximum                          
Line of Credit Facility [Line Items]                          
Covenant compliance, debt to EBITDAX ratio           3.75              
Term Loan Credit Agreement | LIBOR Loans                          
Line of Credit Facility [Line Items]                          
Interest rate (percent)           1.00%              
Debt instrument, basis spread on variable rate (percent)           7.75%              
Term Loan, Initial Loans                          
Line of Credit Facility [Line Items]                          
Revolving credit facility, maximum borrowing           $ 300,000,000              
Line of credit outstanding           $ 300,000,000              
Call protection, multiplier interest rate (percent)           4.00%              
Call protection, multiplier interest rate if occurring in the second term (percent)           2.00%              
Term Loan, Delayed Draw Loans                          
Line of Credit Facility [Line Items]                          
Revolving credit facility, maximum borrowing           $ 100,000,000              
Debt term           18 months              
Line of credit outstanding   $ 60,000,000                      
Unused capacity commitment fee (percent)           2.00%              
Line of credit facility, call protection, multiplier interest rate, first term           36 months              
Term Loan, Delayed Draw Loans | Minimum                          
Line of Credit Facility [Line Items]                          
Line of credit facility, call protection, multiplier interest rate, second term           36 months              
Term Loan, Delayed Draw Loans | Maximum                          
Line of Credit Facility [Line Items]                          
Line of credit facility, call protection, multiplier interest rate, second term           48 months              
Term Loan, Incremental Loans                          
Line of Credit Facility [Line Items]                          
Revolving credit facility, maximum borrowing           $ 100,000,000              
Exchangeable Debt | Extinguishment of Debt                          
Line of Credit Facility [Line Items]                          
Derivative liability                   $ 10,900,000 $ 10,900,000 $ 10,900,000  
Various investors                          
Line of Credit Facility [Line Items]                          
Sale of stock, number of shares issued in transaction (shares) | shares   34,666,668                      
8% Senior Notes Due 2020                          
Line of Credit Facility [Line Items]                          
Percentage of notes at redemption price (percent)                   102.00% 102.00% 102.00%  
Number of days in default payment of interest                       30 days  
Payment of certain final judgments                   $ 25,000,000 $ 25,000,000 $ 25,000,000  
Number of days related to payment certain final judgments                       60 days  
Second Lien Notes                          
Line of Credit Facility [Line Items]                          
Long-term debt, gross                   $ 344,279,000 $ 344,279,000 $ 344,279,000  
8.00% Senior Notes Due 2020 | 8% Senior Notes Due 2020                          
Line of Credit Facility [Line Items]                          
Interest rate (percent)                 8.00%        
8.00% Senior Notes Due 2020 | Senior Notes                          
Line of Credit Facility [Line Items]                          
Interest rate (percent)                   8.00% 8.00% 8.00%  
8.00% Senior Notes Due 2020 | Senior Notes | Maximum                          
Line of Credit Facility [Line Items]                          
Long-term debt, gross                   $ 30,000,000 $ 30,000,000 $ 30,000,000  
Senior Second Lien Notes Due 2023                          
Line of Credit Facility [Line Items]                          
Maximum outstanding principal amount of senior notes under debt covenant   $ 30,000,000                      
Senior Second Lien Notes Due 2023 | Second Lien Notes                          
Line of Credit Facility [Line Items]                          
Interest rate (percent)   8.50%                      
Debt instrument, basis spread on variable rate (percent)   3.00%                      
Covenant compliance, debt to EBITDAX ratio   3.0                      
Maximum rate of increase in interest rate   3.0                      
Cash interest rate threshold (percent)   9.50%                      
Percent of net cash proceeds of asset sales for debt prepayment (percent)   100.00%                      
Threshold amount of casualty events and condemnations   $ 20,000,000                      
Redemption price, percentage of principal amount repurchased (percent)   101.00%                      
Senior Second Lien Notes Due 2023 | Second Lien Notes | From and after May 15, 2018 until May 15, 2021                          
Line of Credit Facility [Line Items]                          
Redemption price (percent)   104.00%                      
Senior Second Lien Notes Due 2023 | Second Lien Notes | On and after May 15, 2021 until May 15, 2022                          
Line of Credit Facility [Line Items]                          
Redemption price (percent)   102.00%                      
Senior Second Lien Notes Due 2023 | Second Lien Notes | On and after May 15, 2022                          
Line of Credit Facility [Line Items]                          
Redemption price (percent)   100.00%                      
Senior Second Lien Notes Due 2023 | Second Lien Notes | Subsequent Event                          
Line of Credit Facility [Line Items]                          
Interest rate increase (percent) 1.00%                        
The Original Notes | 8% Senior Notes Due 2020                          
Line of Credit Facility [Line Items]                          
Principal amount of senior unsecured notes                 $ 300,000,000        
Net proceeds from issuance of senior unsecured notes                 $ 291,200,000        
The 2013 Follow-on Notes | 8% Senior Notes Due 2020                          
Line of Credit Facility [Line Items]                          
Interest rate (percent)               8.00%          
Price of senior unsecured notes (percent)               105.25%          
Additional amount of senior unsecured notes               $ 200,000,000          
Net proceeds from issuance of senior unsecured notes               $ 200,100,000          
The 2015 Mirror Notes | 8% Senior Notes Due 2020                          
Line of Credit Facility [Line Items]                          
Interest rate (percent)             8.00%            
Price of senior unsecured notes (percent)             95.00%            
Additional amount of senior unsecured notes             $ 200,000,000            
Net proceeds from issuance of senior unsecured notes             $ 184,900,000            
Exchange Agreement                          
Line of Credit Facility [Line Items]                          
Sale of stock, subscription arrangement amount, maximum         52,000,000                
Repayments of senior note                     $ 53,800,000    
Exchange Agreement | Plan                          
Line of Credit Facility [Line Items]                          
Repayments of senior note                   $ 3,000,000      
Exchange Agreement | Common Stock                          
Line of Credit Facility [Line Items]                          
Debt conversion, converted instrument, amount         155,000,000                
Exchange Agreement | Other Supporting Noteholders                          
Line of Credit Facility [Line Items]                          
Sale of stock, number of shares issued in transaction (shares) | shares   103,249,915               18,500,000 18,524,907    
Exchange Agreement | Various investors                          
Line of Credit Facility [Line Items]                          
Sale of stock, number of shares issued in transaction (shares) | shares   34,700,000                      
Exchange Agreement | 8.00% Senior Notes Due 2020 | 8% Senior Notes Due 2020                          
Line of Credit Facility [Line Items]                          
Debt conversion, original debt, amount         $ 496,700,000                
Debt conversion, original debt, percent of outstanding debt (percent)         71.00%                
Exchange Agreement | Senior Second Lien Notes Due 2023                          
Line of Credit Facility [Line Items]                          
Second lien notes   $ 344,300,000