Supplemental Oil And Gas Disclosures Supplemental Oil and Gas Disclosures (Narrative) (Details)	12 Months Ended
Dec. 31, 2012
Oil [Member] (bbls)
Average Sales Prices	94.71
Natural Gas Liquids [Member] (bbls)
Average Sales Prices	43.14
Natural Gas [Member] (Mcf)
Average Sales Prices	2.76

The revenues derived from sales of oil or gas in each geographic area during the reporting period divided by the number of barrels of oil produced or thousands of cubic feet of gas produced.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Industry Guide

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