Quarterly report pursuant to Section 13 or 15(d)

LONG-TERM DEBT (Details)

v3.4.0.3
LONG-TERM DEBT (Details)
3 Months Ended
May. 10, 2016
USD ($)
Dec. 31, 2016
Mar. 31, 2016
USD ($)
Dec. 31, 2015
May. 18, 2015
USD ($)
May. 13, 2013
USD ($)
May. 18, 2012
USD ($)
Line of Credit Facility [Line Items]              
Rate of senior unsecured notes     8.00% 8.00%      
8% Senior Notes Due 2020 [Member]              
Line of Credit Facility [Line Items]              
Rate of senior unsecured notes     8.00%        
Percentage of notes at redemption prices for prior to June 1, 2016     100.00%        
Percentage of notes at redemption prices for the twelve-month period beginning on June 1, 2016     104.00%        
Percentage of notes at redemption prices for the twelve-month period beginning on June 1, 2017     102.00%        
Percentage of notes at redemption prices for beginning on June 1, 2018     100.00%        
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 (in days)     60 days        
8% Senior Notes Due 2020 [Member] | The "2015 Mirror Notes" [Member]              
Line of Credit Facility [Line Items]              
Rate of senior unsecured notes         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        
8% Senior Notes Due 2020 [Member] | The "Original Notes" [Member]              
Line of Credit Facility [Line Items]              
Principal amount of senior unsecured notes             $ 300,000,000
Rate of senior unsecured notes             8.00%
Maturity date     Jun. 01, 2020        
Net proceeds from issuance of senior unsecured notes     $ 291,200,000        
8% Senior Notes Due 2020 [Member] | The "2013 Follow-on Notes" [Member]              
Line of Credit Facility [Line Items]              
Rate of senior unsecured notes           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        
Revolving Credit Facility [Member]              
Line of Credit Facility [Line Items]              
Revolving credit facility, maximum borrowing     750,000,000        
Borrowing base     550,000,000        
Borrowings under Credit Facility     117,000,000        
Remaining borrowing capacity of Credit Facility     $ 433,000,000        
Revolving credit facility, maturity date     Sep. 30, 2018        
Loans issued under revolving credit facility     $ 117,000,000        
Weighted average interest rate     1.94%        
Line of credit facility covenant terms current ratio     1.0        
Line of credit facility ratio of debt to EBITDAX     2.5        
Line of credit facility ratio of EBITDAX to interest expense     2.5        
Revolving Credit Facility [Member] | Subsequent Event [Member]              
Line of Credit Facility [Line Items]              
Borrowing base $ 350,000,000            
Reduction in borrowing base, percentage 36.00%            
Revolving Credit Facility [Member] | Minimum [Member]              
Line of Credit Facility [Line Items]              
Commitment fee percentage     0.375%        
Revolving Credit Facility [Member] | Maximum [Member]              
Line of Credit Facility [Line Items]              
Commitment fee percentage     0.50%        
Revolving Credit Facility [Member] | LIBOR Loans [Member]              
Line of Credit Facility [Line Items]              
Interest rate margin in effect during period     1.50%        
Commitment fee percentage     0.375%        
Revolving Credit Facility [Member] | LIBOR Loans [Member] | Forecast [Member]              
Line of Credit Facility [Line Items]              
Increase in variable basis spread percentage   0.50%          
Revolving Credit Facility [Member] | LIBOR Loans [Member] | Minimum [Member]              
Line of Credit Facility [Line Items]              
Interest rate margin in effect during period     1.50%        
Revolving Credit Facility [Member] | LIBOR Loans [Member] | Maximum [Member]              
Line of Credit Facility [Line Items]              
Interest rate margin in effect during period     2.50%        
Revolving Credit Facility [Member] | Alternate Base Rate Loans [Member]              
Line of Credit Facility [Line Items]              
Interest rate margin in effect during period     0.50%        
Revolving Credit Facility [Member] | Alternate Base Rate Loans [Member] | Minimum [Member]              
Line of Credit Facility [Line Items]              
Interest rate margin in effect during period     0.50%        
Revolving Credit Facility [Member] | Alternate Base Rate Loans [Member] | Maximum [Member]              
Line of Credit Facility [Line Items]              
Interest rate margin in effect during period     1.50%