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Business Combination (Details) (Buffalo Creek Acquisition, USD $)
6 Months Ended 0 Months Ended
Jun. 30, 2013
May 08, 2013
Chesapeake
mi
acre
May 08, 2013
Chesapeake
Texas
mi
May 08, 2013
Chesapeake
Oklahoma
mi
Business Combination        
Purchase price   $ 225,200,000    
Capacity of cryogenic natural gas processing plant (in MMcf/d)   200    
Length of natural gas gathering pipeline (in miles)     22 5
Length of rights-of-way associated with the future construction of a high-pressure trunk line (in miles)   30    
Area of land (in acres)   130,000    
Extended additional term of the keep-whole processing agreement   5 years    
Additional cash paid as consideration for extension term of the keep-whole processing agreement   20,000,000    
Assets        
Property, plant and equipment 149,382,000      
Goodwill 2,682,000      
Intangible asset 84,500,000      
Liabilities        
Accounts payable 11,354,000      
Total $ 225,210,000      
Estimated useful life of intangibles 20 years