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Derivative Financial Instruments Derivative Financial Instruments (Details) (Commodity Price Risk Management, net [Member], USD $)
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12 Months Ended | |
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Dec. 31, 2013
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Dec. 31, 2012
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Commodity Price Risk Management, net [Member]
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| Derivative [Line Items] | ||
| Net settlements | $ 58,713 | $ 137,551 |
| Net change in fair value of unsettled derivatives | (72,483) | (94,253) |
| Total commodity price risk management gain (loss), net | $ (13,770) | $ 43,298 |