Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Additional Information (Details)

v3.3.0.814
Subsequent Events - Additional Information (Details)
 1 Months Ended 9 Months Ended
Oct. 30, 2015
USD ($)
Oct. 15, 2015
USD ($)
a
$ / bbl
Oct. 30, 2015
USD ($)
Sep. 30, 2015
USD ($)
Subsequent Event [Line Items]        
Addition to available cash       $ 100,000,000
Minimum | Third Quarter of 2015        
Subsequent Event [Line Items]        
Current ratio       75.00%
Subsequent Event        
Subsequent Event [Line Items]        
Gain (loss) on disposition of proved property   $ 0    
Minimum borrowing base amount allowed before bond or term loan purchase $ 200,000,000   $ 200,000,000  
Letter of credit maximum amount outstanding prior to repurchase of bonds or term loans 100,000,000   100,000,000  
Subsequent Event | Revolving Credit Facility        
Subsequent Event [Line Items]        
Line of credit maximum amount outstanding prior to repurchase of bonds or term loans 0   0  
Revolving bank credit facility borrowing base $ 350,000,000   $ 350,000,000  
Line of credit effective date     Oct. 30, 2015  
Subsequent Event | Minimum | Fourth Quarter of 2015        
Subsequent Event [Line Items]        
Current ratio 0.75%      
Subsequent Event | Minimum | Third Quarter of 2015        
Subsequent Event [Line Items]        
First lien leverage ratio 1.50%      
Subsequent Event | Maximum        
Subsequent Event [Line Items]        
Limit on percentage of reserves related to recognition of gain or loss   25.00%    
Secured debt leverage ratio 3.50%      
Subsequent Event | Maximum | First Quarter of 2016        
Subsequent Event [Line Items]        
Current ratio 1.00%      
Subsequent Event | Maximum | Third Quarter of 2015        
Subsequent Event [Line Items]        
First lien leverage ratio 2.50%      
Subsequent Event | Ajax Resources, LLC        
Subsequent Event [Line Items]        
Acres of oil and gas property, net | a   25,800    
Proceeds from sale of interests   $ 376,100,000    
Agreement effective date   Jan. 01, 2015    
Subsequent Event | Ajax Resources, LLC | Minimum        
Subsequent Event [Line Items]        
Overriding royalty interest   1.00%    
Subsequent Event | Ajax Resources, LLC | Maximum        
Subsequent Event [Line Items]        
Overriding royalty interest   4.00%    
Subsequent Event | NYMEX        
Subsequent Event [Line Items]        
Addition to available cash   $ 100,000,000    
Subsequent Event | Crude Oil | NYMEX | Minimum        
Subsequent Event [Line Items]        
Trading price per barrel | $ / bbl   70.00    
Subsequent Event | Crude Oil | NYMEX | Maximum        
Subsequent Event [Line Items]        
Trading price per barrel | $ / bbl   90.00