Quarterly report pursuant to Section 13 or 15(d)

Acquisitions (Details)

v3.3.0.814
Acquisitions (Details)
$ in Thousands
 1 Months Ended 12 Months Ended
Aug. 31, 2015
USD ($)
Jun. 29, 2015
USD ($)
a
Jun. 12, 2015
USD ($)
a
well
mi
MMcf
Jun. 09, 2015
USD ($)
a
Mar. 20, 2014
USD ($)
Jun. 29, 2015
USD ($)
a
Apr. 30, 2015
USD ($)
a
Dec. 31, 2014
USD ($)
Feb. 28, 2014
a
Rhino Exploration, LLC, Utica Shale Properties [Member]                  
Business Acquisition [Line Items]                  
Purchase price               $ 182,000  
Gas and oil acreage, net | a                 8,000
Cash, net of purchase price adjustments         $ 179,527     $ 179,500  
Fair value of net identifiable assets acquired         179,527        
Rhino Exploration, LLC, Utica Shale Properties [Member] | Proved Properties [Member]                  
Business Acquisition [Line Items]                  
Fair value of net identifiable assets acquired         31,961        
Rhino Exploration, LLC, Utica Shale Properties [Member] | Unproved Properties [Member]                  
Business Acquisition [Line Items]                  
Fair value of net identifiable assets acquired         6,263        
Rhino Exploration, LLC, Utica Shale Properties [Member] | Unevaluated Properties [Member]                  
Business Acquisition [Line Items]                  
Fair value of net identifiable assets acquired         $ 141,303        
Paloma Partners III, LLC [Member]                  
Business Acquisition [Line Items]                  
Purchase price $ 302,300           $ 301,900    
Gas and oil acreage, net | a             24,000    
Amount put in escrow $ 30,100           $ 75,000    
American Energy - Utica, LLC [Member]                  
Business Acquisition [Line Items]                  
Purchase price           $ 405,400      
Amount put in escrow       $ 67,100          
Cash, net of purchase price adjustments     $ 405,029            
Fair value of net identifiable assets acquired     405,029            
American Energy - Utica, LLC [Member] | Proved Properties [Member]                  
Business Acquisition [Line Items]                  
Fair value of net identifiable assets acquired     70,804            
American Energy - Utica, LLC [Member] | Unevaluated Properties [Member]                  
Business Acquisition [Line Items]                  
Fair value of net identifiable assets acquired     334,225            
Belmont And Jefferson Counties, Ohio [Member] | American Energy - Utica, LLC [Member]                  
Business Acquisition [Line Items]                  
Purchase price       $ 68,200          
Gross and net acres acquired | a       6,198          
Monroe County, Ohio [Member] | American Energy - Utica, LLC [Member]                  
Business Acquisition [Line Items]                  
Purchase price   $ 18,200 $ 319,000            
Gas and oil acreage, gross | a   4,950 38,965     4,950      
Gas and oil acreage, net | a   1,900 27,228     1,900      
Daily production of well acquired | MMcf     14.6            
Gross wells acquired | well     18            
Net wells acquired | well     11.3            
Gas gathering system (in miles) | mi     11            
Number of well pad locations acquired | well     4