Impairments (Policies)	3 Months Ended
Mar. 31, 2016
Asset Impairment Charges [Abstract]
Impairment or Disposal of Long-Lived Assets, Policy	Our proved oil and natural gas properties are subject to quarterly full cost ceiling tests.

Disclosure of accounting policy for recognizing and measuring the impairment of long-lived assets. An entity also may disclose its accounting policy for long-lived assets to be sold. This policy excludes goodwill and intangible assets.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 5.CC)
-URI http://asc.fasb.org/extlink&oid=27011434&loc=d3e125687-122742

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=68058157&loc=d3e18780-107790

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 05
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=64802544&loc=d3e202-110218

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