Quarterly report pursuant to Section 13 or 15(d)

DEBT (Details)

v3.8.0.1
DEBT (Details)
9 Months Ended
Sep. 30, 2017
USD ($)
May 18, 2015
USD ($)
May 13, 2013
USD ($)
May 18, 2012
USD ($)
Line of Credit Facility [Line Items]        
Rate of Senior notes 8.00%      
8% Senior Notes Due 2020 [Member]        
Line of Credit Facility [Line Items]        
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 60 days      
8% Senior Notes Due 2020 [Member] | The "Original Notes" [Member]        
Line of Credit Facility [Line Items]        
Rate of Senior notes       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 [Member] | The "2013 Follow-on Notes" [Member]        
Line of Credit Facility [Line Items]        
Rate of Senior 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      
8% Senior Notes Due 2020 [Member] | The "2015 Mirror Notes" [Member]        
Line of Credit Facility [Line Items]        
Rate of Senior 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      
Revolving Credit Facility [Member]        
Line of Credit Facility [Line Items]        
Revolving credit facility, maximum borrowing 750,000,000      
Borrowing base 325,000,000      
Borrowings under Credit Facility 155,000,000      
Remaining borrowing capacity of Credit Facility 170,000,000      
Loans issued under revolving credit facility $ 155,000,000      
Weighted average interest rate 3.49%      
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 1.5      
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] | Alternate Base Rate Loans [Member]        
Line of Credit Facility [Line Items]        
Interest rate margin in effect during period 1.25%      
Revolving Credit Facility [Member] | Alternate Base Rate Loans [Member] | Minimum [Member]        
Line of Credit Facility [Line Items]        
Interest rate margin in effect during period 1.00%      
Revolving Credit Facility [Member] | Alternate Base Rate Loans [Member] | Maximum [Member]        
Line of Credit Facility [Line Items]        
Interest rate margin in effect during period 2.00%      
Revolving Credit Facility [Member] | LIBOR Loans [Member]        
Line of Credit Facility [Line Items]        
Interest rate margin in effect during period 2.25%      
Commitment fee percentage 0.375%      
Revolving Credit Facility [Member] | LIBOR Loans [Member] | Minimum [Member]        
Line of Credit Facility [Line Items]        
Interest rate margin in effect during period 2.00%      
Revolving Credit Facility [Member] | LIBOR Loans [Member] | Maximum [Member]        
Line of Credit Facility [Line Items]        
Interest rate margin in effect during period 3.00%