Supplementary Oil And Natural Gas Disclosures (Unaudited) (Narrative) (Details)	12 Months Ended
	Dec. 31, 2015 $ / Mcf	Dec. 31, 2015 $ / Boe	Dec. 31, 2015 $ / bbl	Dec. 31, 2015 $ / BTU	Dec. 31, 2014 $ / Mcf	Dec. 31, 2014 $ / Boe	Dec. 31, 2014 $ / bbl	Dec. 31, 2014 $ / BTU	Dec. 31, 2014	Dec. 31, 2013 $ / Mcf	Dec. 31, 2013 $ / Boe	Dec. 31, 2013 $ / bbl	Dec. 31, 2013 $ / BTU
Oil and Gas Exploration and Production Industries Disclosures [Abstract]
Average sales prices	2.82	47.17			4.95	92.86				3.98	101.85
Average production costs | $ / Boe		10.38				7.29					10.70
Percentage of annual discount rate for future cash flows									10.00%
Supplementary Oil and Natural Gas Disclosures (Textual) [Abstract]
Twelve month average price on the basis of which oil price is estimated | $ / bbl			50.28				94.99					93.42
Twelve month average price on the basis of which gas price is estimated | $ / BTU				2.66				4,350,000.00					3.67