Fair Value Measurements (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Net valuation of the Company's derivatives subject to fair value measurement on a recurring basis
Estimated fair value of the Notes	$ 365,000,000	$ 364,000,000
Book value of notes	350,000,000	350,000,000
Quoted Prices in Active Markets (Level 1)
Derivatives, Fair Value [Line Items]
Commodity derivatives at fair value	0	0
Significant Other Observable Inputs (Level 2)
Derivatives, Fair Value [Line Items]
Commodity derivatives at fair value	1,399,000	(1,096,000)
Significant Unobservable Inputs (Level 3)
Derivatives, Fair Value [Line Items]
Commodity derivatives at fair value	$ 0	$ 0

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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Fair value of the assets less the liabilities of a derivative or group of derivatives.

+ References

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-Publisher FASB

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Carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. Senior note holders are paid off in full before any payments are made to junior note holders.

+ References

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-Name Accounting Standards Codification

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-Section S99

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-Publisher SEC

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