Quarterly report pursuant to Section 13 or 15(d)

REVOLVING CREDIT FACILITY AND LONG-TERM DEBT (Details)

v3.3.0.814
REVOLVING CREDIT FACILITY AND LONG-TERM DEBT (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2015
Oct. 31, 2015
May. 18, 2015
Dec. 31, 2014
Sep. 30, 2014
May. 13, 2013
May. 18, 2012
Line of Credit Facility [Line Items]              
Rate of senior unsecured notes 8.00%     8.00% 8.00%    
Revolving Credit Facility [Member]              
Line of Credit Facility [Line Items]              
Revolving credit facility, maximum borrowing $ 750.0            
Borrowing base 550.0            
Borrowings under Credit Facility 170.0            
Remaining borrowing capacity of Credit Facility $ 380.0            
Revolving credit facility, maturity date Sep. 30, 2018            
Loans issued under revolving credit facility $ 170.0            
Weighted average interest rate 1.96%            
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   $ 550.0          
Minimum [Member] | Revolving Credit Facility [Member]              
Line of Credit Facility [Line Items]              
Commitment fee percentage 0.375%            
Maximum [Member] | Revolving Credit Facility [Member]              
Line of Credit Facility [Line Items]              
Commitment fee percentage 0.50%            
8% Senior Notes Due 2020 [Member]              
Line of Credit Facility [Line Items]              
Rate of senior unsecured notes     8.00%     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 $ 25.0            
Number of days related to payment certain final judgments 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     $ 200.0        
Net proceeds from issuance of senior unsecured notes $ 184.9            
8% Senior Notes Due 2020 [Member] | The "Original Notes" [Member]              
Line of Credit Facility [Line Items]              
Principal amount of senior unsecured notes             $ 300.0
Rate of senior unsecured notes             8.00%
Maturity date Jun. 01, 2020            
Net proceeds from issuance of senior unsecured notes $ 291.2            
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           $ 200.0  
Net proceeds from issuance of senior unsecured notes $ 200.1            
LIBOR Loans [Member] | Revolving Credit Facility [Member]              
Line of Credit Facility [Line Items]              
Commitment fee percentage 0.375%            
Interest rate margin in effect during period 1.75%            
LIBOR Loans [Member] | Minimum [Member] | Revolving Credit Facility [Member]              
Line of Credit Facility [Line Items]              
Interest rate margin in effect during period 1.50%            
LIBOR Loans [Member] | Maximum [Member] | Revolving Credit Facility [Member]              
Line of Credit Facility [Line Items]              
Interest rate margin in effect during period 2.50%            
Alternate Base Rate Loans [Member] | Revolving Credit Facility [Member]              
Line of Credit Facility [Line Items]              
Interest rate margin in effect during period 0.75%            
Alternate Base Rate Loans [Member] | Minimum [Member] | Revolving Credit Facility [Member]              
Line of Credit Facility [Line Items]              
Interest rate margin in effect during period 0.50%            
Alternate Base Rate Loans [Member] | Maximum [Member] | Revolving Credit Facility [Member]              
Line of Credit Facility [Line Items]              
Interest rate margin in effect during period 1.50%