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Significant Accounting Policies (Concentration of Credit Risk Textuals) (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Concentration Risk [Line Items]        
Allowance for Doubtful Accounts Receivable $ 0   $ 0  
Sales Revenue, Net [Member]
       
Concentration Risk [Line Items]        
Concentration Risk, Percentage     10.00%  
Sales Revenue, Net [Member] | Devon Energy Corporation [Member]
       
Concentration Risk [Line Items]        
Concentration Risk, Percentage 24.10% 91.90% 34.80% 92.00%