Summary Of Significant Accounting Policies (Summary Of Derivative Instruments Contracts) (Details)	Sep. 30, 2013 Natural Gas Costless Collars [Member] Fixed Price One [Member] MMBTU	Sep. 30, 2013 Natural Gas Costless Collars [Member] Fixed Price Two [Member] MMBTU	Sep. 30, 2013 Natural Gas Costless Collars [Member] Fixed Price Three [Member] MMBTU	Sep. 30, 2013 Natural Gas Costless Collars [Member] Fixed Price Four [Member] MMBTU	Sep. 30, 2014 Natural Gas Costless Collars [Member] Fixed Price Fourteen [Member] MMBTU	Sep. 30, 2013 Natural Gas Fixed Price Swaps [Member] Fixed Price Five [Member] MMBTU	Sep. 30, 2013 Natural Gas Fixed Price Swaps [Member] Fixed Price Six [Member] MMBTU	Sep. 30, 2013 Natural Gas Fixed Price Swaps [Member] Fixed Price Seven [Member] MMBTU	Sep. 30, 2013 Natural Gas Fixed Price Swaps [Member] Fixed Price Eight [Member] MMBTU	Sep. 30, 2014 Natural Gas Fixed Price Swaps [Member] Fixed Price Fifteen [Member] MMBTU	Sep. 30, 2014 Natural Gas Fixed Price Swaps [Member] Fixed Price Sixteen [Member] MMBTU	Sep. 30, 2014 Natural Gas Fixed Price Swaps [Member] Fixed Price Seventeen [Member] MMBTU	Sep. 30, 2013 Oil costless collars [Member] Fixed Price Nine [Member] bbl	Sep. 30, 2013 Oil costless collars [Member] Fixed Price Ten [Member] bbl	Sep. 30, 2013 Oil costless collars [Member] Fixed Price Eleven [Member] bbl	Sep. 30, 2013 Oil costless collars [Member] Fixed Price Twelve [Member] bbl	Sep. 30, 2014 Oil costless collars [Member] Fixed Price Eighteen [Member] bbl	Sep. 30, 2014 Oil costless collars [Member] Fixed Price Nineteen [Member] bbl	Sep. 30, 2013 Oil Fixed Price Swaps [Member] Fixed Price Thirteen [Member] bbl	Sep. 30, 2014 Oil Fixed Price Swaps [Member] Fixed Price Twenty [Member] bbl	Sep. 30, 2014 Oil Fixed Price Swaps [Member] Fixed Price Twenty One [Member] bbl	Sep. 30, 2014 Oil Fixed Price Swaps [Member] Fixed Price Twenty Two [Member] bbl	Sep. 30, 2014 Oil Fixed Price Swaps [Member] Fixed Price Twenty Three [Member] bbl	Sep. 30, 2014 Oil Fixed Price Swaps [Member] Fixed Price Twenty Four [Member] bbl	Sep. 30, 2014 Oil Fixed Price Swaps [Member] Fixed Price Twenty Five [Member] bbl	Sep. 30, 2014 Oil Fixed Price Swaps [Member] Fixed Price Twenty Six [Member] bbl	Sep. 30, 2014 Oil Fixed Price Swaps [Member] Fixed Price Twenty Seven [Member] bbl	Sep. 30, 2014 Oil Fixed Price Swaps [Member] Fixed Price Twenty Eight [Member] bbl	Sep. 30, 2014 Oil Fixed Price Swaps [Member] Fixed Price Twenty Nine [Member] bbl	Sep. 30, 2013 Minimum [Member] Natural Gas Costless Collars [Member] Fixed Price One [Member]	Sep. 30, 2013 Minimum [Member] Natural Gas Costless Collars [Member] Fixed Price Two [Member]	Sep. 30, 2013 Minimum [Member] Natural Gas Costless Collars [Member] Fixed Price Three [Member]	Sep. 30, 2013 Minimum [Member] Natural Gas Costless Collars [Member] Fixed Price Four [Member]	Sep. 30, 2014 Minimum [Member] Natural Gas Costless Collars [Member] Fixed Price Fourteen [Member]	Sep. 30, 2013 Minimum [Member] Oil costless collars [Member] Fixed Price Nine [Member]	Sep. 30, 2013 Minimum [Member] Oil costless collars [Member] Fixed Price Ten [Member]	Sep. 30, 2013 Minimum [Member] Oil costless collars [Member] Fixed Price Eleven [Member]	Sep. 30, 2013 Minimum [Member] Oil costless collars [Member] Fixed Price Twelve [Member]	Sep. 30, 2014 Minimum [Member] Oil costless collars [Member] Fixed Price Eighteen [Member]	Sep. 30, 2014 Minimum [Member] Oil costless collars [Member] Fixed Price Nineteen [Member]	Sep. 30, 2013 Maximum [Member] Natural Gas Costless Collars [Member] Fixed Price One [Member]	Sep. 30, 2013 Maximum [Member] Natural Gas Costless Collars [Member] Fixed Price Two [Member]	Sep. 30, 2013 Maximum [Member] Natural Gas Costless Collars [Member] Fixed Price Three [Member]	Sep. 30, 2013 Maximum [Member] Natural Gas Costless Collars [Member] Fixed Price Four [Member]	Sep. 30, 2014 Maximum [Member] Natural Gas Costless Collars [Member] Fixed Price Fourteen [Member]	Sep. 30, 2013 Maximum [Member] Oil costless collars [Member] Fixed Price Nine [Member]	Sep. 30, 2013 Maximum [Member] Oil costless collars [Member] Fixed Price Ten [Member]	Sep. 30, 2013 Maximum [Member] Oil costless collars [Member] Fixed Price Eleven [Member]	Sep. 30, 2013 Maximum [Member] Oil costless collars [Member] Fixed Price Twelve [Member]	Sep. 30, 2014 Maximum [Member] Oil costless collars [Member] Fixed Price Eighteen [Member]	Sep. 30, 2014 Maximum [Member] Oil costless collars [Member] Fixed Price Nineteen [Member]
Derivative [Line Items]
Production volume covered per month - Natural Gas	80,000	50,000	100,000	160,000	140,000	100,000	70,000	40,000	100,000	140,000	30,000	40,000
Production volume covered per month - Oil													3,000	4,000	2,000	4,000	4,000	5,000	4,000	3,000	4,000	4,000	5,000	6,000	7,000	5,000	4,000	5,000	7,000
Fixed price						3.505	3.400	3.655	4.320	4.11	4.30	4.61							105.25	94.50	99.40	95.25	94.20	92.85	96.80	97.40	97.25	94.56	93.91	3.75	3.75	3.75	4.00	3.75	90.00	90.00	90.00	90.00	85.00	90.00	4.25	4.30	4.05	4.55	4.50	102.00	101.50	97.50	101.50	100.00	97.00