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Commitments and Contingencies (Details)
$ in Thousands
9 Months Ended
Apr. 27, 2015
USD ($)
Sep. 30, 2015
USD ($)
a
Sep. 30, 2014
USD ($)
Jan. 21, 2014
a
Water Rights Litigation Mt. Emmons Project [Abstract]        
Period for proposal submission   6 years    
Gas and Oil Acreage [Line Items]        
Gross acres acquired in acquisition (in acres) | a       160
Working interest percentage       50.00%
Proceeds from Legal Settlements   $ 1,500 $ 0  
Dimmit Wood Properties Ltd [Member]        
Gas and Oil Acreage [Line Items]        
Gross acres acquired in acquisition (in acres) | a   800.77    
Working interest percentage   30.00%    
Crimson and Liberty [Member]        
Gas and Oil Acreage [Line Items]        
Proceeds from Legal Settlements $ 1,500