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Supplemental Oil And Gas Disclosures Supplemental Oil and Gas Disclosures (Narrative) (Details)
 12 Months Ended
Dec. 31, 2014
Oil (bbls)  
Average Sales Prices 94.99us-gaap_AverageSalesPrices
/ us-gaap_ReserveQuantitiesByTypeOfReserveAxis
= us-gaap_OilReservesMember
Natural Gas Liquids (bbls)  
Average Sales Prices 45.25us-gaap_AverageSalesPrices
/ us-gaap_ReserveQuantitiesByTypeOfReserveAxis
= us-gaap_NaturalGasLiquidsReservesMember
Natural Gas (Mcf)  
Average Sales Prices 4.36us-gaap_AverageSalesPrices
/ us-gaap_ReserveQuantitiesByTypeOfReserveAxis
= us-gaap_NaturalGasReservesMember