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Commodity Risk Derivatives - Schedule of Fair Value Commodity Derivatives (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Price Risk Derivatives [Abstract]
Fair value of oil and natural gas derivatives - Current Assets, Gross Amount	$ 126	$ 168
Fair value of oil and natural gas derivatives - Current Assets, Amount Offset	(126)	(168)
Fair value of oil and natural gas derivatives - Current Assets
Fair value of oil and natural gas derivatives - Current Liabilities, Gross Amount	(170)	(216)
Fair value of oil and natural gas derivatives - Current Liabilities, Amount Offset	63	55
Fair value of oil and natural gas derivatives - Current Liabilities	$ (107)	$ (161)

X

- Definition

Amount of obligation to return cash collateral under master netting arrangements offset against derivative assets.

+ References

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