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Supplemental Information on Oil and Natural Gas Producing Activities - Results of Operations from Oil and Natural Gas Producing Activities (Unaudited) (Additional Information) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Extractive Industries [Abstract]
Impairment	$ 4,473,787	$ 164,779	$ 0
Decrease in income tax benefit to include impact of the ceiling test impairment		$ 1,100

X

- Definition

Results of Operations, Income Tax Expense (Benefit), Adjustment

+ References

No definition available.

+ Details

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- References

No definition available.

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- Definition

Costs related to the impairment of oil and gas properties.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-10.(c)(3)(ii)(A)(1))
-URI http://asc.fasb.org/extlink&oid=50486907&loc=d3e511914-122862

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