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Fair Value of Financial Instruments (Fair Value of Derivative Instruments) (Details) (Asset Retirement Obligation Costs [Member], USD $)
Dec. 31, 2012
Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Liabilities, Fair Value Disclosure, Nonrecurring $ (71,200) $ 74,400
Level 3 [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Liabilities, Fair Value Disclosure, Nonrecurring $ (71,200) $ 74,400