Supplementary Information On Oil, Ngl And Natural Gas Reserves (Summary of Proved Developed and Undeveloped Reserves) (Details)	Sep. 30, 2015 Mcfe Mcf bbl	Sep. 30, 2014 Mcfe Mcf bbl	Sep. 30, 2013 Mcf bbl
Reserve Quantities [Line Items]
Proved Undeveloped Reserves | Mcfe	71,917,599	90,904,931
Oil [Member]
Reserve Quantities [Line Items]
Proved Developed Reserves (Volume)	2,725,077	2,890,678	1,037,721
Proved Undeveloped Reserves (Volume)	4,313,353	4,678,901	605,582
Natural Gas Liquids [Member]
Reserve Quantities [Line Items]
Proved Developed Reserves (Volume)	1,466,834	1,564,859	764,321
Proved Undeveloped Reserves (Volume)	1,453,766	1,475,322	851,805
Natural Gas [Member]
Reserve Quantities [Line Items]
Proved Developed Reserves (Volume) | Mcf	82,899,159	88,512,767	82,298,833
Proved Undeveloped Reserves (Volume) | Mcf	37,314,885	53,979,593	49,990,334