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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.

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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.

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Fair Value Measurements (Details) - USD ($)	Mar. 31, 2016	Dec. 31, 2015	Jul. 03, 2013	Aug. 19, 2010
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	1,277,000	1,508,000
Significant Unobservable Inputs (Level 3)
Derivatives, Fair Value [Line Items]
Commodity derivatives at fair value	0	0
Senior Notes \| 10% Senior Unsecured Notes due 2017
Net valuation of the Company's derivatives subject to fair value measurement on a recurring basis
Estimated fair value of the Notes	62,500,000	238,000,000
Book value of notes	135,621,000	$ 350,000,000
Principal amount			$ 200,000,000	$ 150,000,000
Senior Notes \| 10% Senior Secured Notes due 2021
Net valuation of the Company's derivatives subject to fair value measurement on a recurring basis
Estimated fair value of the Notes	92,600,000
Book value of notes	158,300,000
Principal amount	$ 144,700,000