Quarterly report pursuant to Section 13 or 15(d)

LONG-TERM DEBT (Details)

v3.8.0.1
LONG-TERM DEBT (Details) - USD ($)
3 Months Ended
Jan. 31, 2018
Nov. 01, 2017
Mar. 31, 2018
Dec. 31, 2017
May 18, 2015
May 13, 2013
May 18, 2012
Line of Credit Facility [Line Items]              
Interest rate     8.00%        
Long-term debt, gross     $ 1,000,000,000 $ 1,000,000,000      
Common stock, par value (in dollars per share)     $ 0.001 $ 0.001      
Long-term debt     $ 980,800,000 $ 979,324,222      
Senior Notes | 8% Senior Notes              
Line of Credit Facility [Line Items]              
Interest rate     8.00%        
Long-term debt, gross     $ 700,000,000 700,000,000      
Long-term debt     692,800,000 $ 691,954,489      
Senior Notes | 8% Senior Notes | Maximum              
Line of Credit Facility [Line Items]              
Long-term debt, gross     $ 30,000,000        
8% Senior Notes Due 2020              
Line of Credit Facility [Line Items]              
Percentage of notes at redemption prices for the twelve-month period beginning on June 1, 2017     102.00%        
Number of days in default payment of interest     30 days        
Payment of certain final judgments     $ 25,000,000        
Number of days related to payment certain final judgments     60 days        
8% Senior Notes Due 2020 | The Original Notes              
Line of Credit Facility [Line Items]              
Interest rate             8.00%
Principal amount of senior unsecured notes             $ 300,000,000
Maturity date     Jun. 01, 2020        
Net proceeds from issuance of senior unsecured notes     $ 291,200,000        
8% Senior Notes Due 2020 | The 2013 Follow-on Notes              
Line of Credit Facility [Line Items]              
Interest rate           8.00%  
Maturity date     Jun. 01, 2020        
Price of senior unsecured notes           105.25%  
Additional amount of senior unsecured notes           $ 200,000,000  
Net proceeds from issuance of senior unsecured notes     $ 200,100,000        
8% Senior Notes Due 2020 | The 2015 Mirror Notes              
Line of Credit Facility [Line Items]              
Interest rate         8.00%    
Maturity date     Jun. 01, 2020        
Price of senior unsecured notes         95.00%    
Additional amount of senior unsecured notes         $ 200,000,000    
Net proceeds from issuance of senior unsecured notes     $ 184,900,000        
Term Loan              
Line of Credit Facility [Line Items]              
Revolving credit facility, maximum borrowing   $ 500,000,000          
Interest rate   3.00%          
Prepayment rate requirement   100.00%          
Outstanding balance period used for yield maintenance rate   1 year          
Call protection, multiplier interest rate   7.00%          
Call protection, multiplier interest rate if occurring in the first term   7.00%          
Line of credit facility, call protection, multiplier interest rate, first term   18 months          
Call protection, multiplier interest rate if occurring in the second term   3.00%          
Call protection, multiplier interest rate if occurring in the third term   1.00%          
Term Loan | Maximum              
Line of Credit Facility [Line Items]              
Line of credit facility, call protection, multiplier interest rate, second term   30 months          
Line of credit facility, call protection, multiplier interest rate, third term   42 months          
Line of credit facility, covenant compliance, debt to EBITDAX ratio   3.75          
Term Loan | Minimum              
Line of Credit Facility [Line Items]              
Line of credit facility, call protection, multiplier interest rate, second term   18 months          
Line of credit facility, call protection, multiplier interest rate, third term   30 months          
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 | LIBOR Loans              
Line of Credit Facility [Line Items]              
Interest rate   1.00%          
Debt instrument, basis spread on variable rate   7.75%          
Term Loan, Initial Loans              
Line of Credit Facility [Line Items]              
Revolving credit facility, maximum borrowing   $ 300,000,000          
Term Loan, Delayed Draw Loans              
Line of Credit Facility [Line Items]              
Revolving credit facility, maximum borrowing   $ 100,000,000          
Debt term   18 months          
Unused capacity commitment fee   2.00%          
Term Loan, Incremental Loans              
Line of Credit Facility [Line Items]              
Revolving credit facility, maximum borrowing   $ 100,000,000          
Exchange Agreement              
Line of Credit Facility [Line Items]              
Common stock, par value (in dollars per share) $ 0.001            
Exchange Agreement | 8% Senior Notes Due 2020 | 8.00% Senior Notes Due 2020              
Line of Credit Facility [Line Items]              
Debt conversion, original debt, amount $ 497,000,000            
Debt conversion, original debt, percent of outstanding debt 71.00%            
Exchange Agreement | Secured Debt | Senior Second Lien Notes Due 2023              
Line of Credit Facility [Line Items]              
Long-term debt $ 344,000,000            
Common Stock | Exchange Agreement              
Line of Credit Facility [Line Items]              
Debt conversion, converted instrument, amount 155,000,000            
Other Supporting Noteholders | Common Stock | Exchange Agreement              
Line of Credit Facility [Line Items]              
Debt instrument, convertible, conversion ratio adjustment threshold, minimum raised equity $ 140,000,000