Derivatives (Summary Of Derivative Instruments Contracts) (Details) | Mar. 31, 2014 | Sep. 30, 2013 |
MMBTU | MMBTU |
Natural Gas Costless Collars [Member] | Fixed Price One [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Production volume covered per month - Natural Gas | 160,000 | 80,000 |
Natural Gas Costless Collars [Member] | Fixed Price Two [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Production volume covered per month - Natural Gas | 40,000 | 50,000 |
Natural Gas Costless Collars [Member] | Fixed Price Three [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Production volume covered per month - Natural Gas | 50,000 | 100,000 |
Natural Gas Costless Collars [Member] | Fixed Price Four [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Production volume covered per month - Natural Gas | 80,000 | 160,000 |
Natural Gas Costless Collars [Member] | Fixed Price Five [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Production volume covered per month - Natural Gas | 140,000 | ' |
Natural Gas Fixed Price Swaps [Member] | Fixed Price Five [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Production volume covered per month - Natural Gas | ' | 100,000 |
Contract price | ' | 3.505 |
Natural Gas Fixed Price Swaps [Member] | Fixed Price Six [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Production volume covered per month - Natural Gas | 80,000 | 70,000 |
Contract price | 4.085 | 3.4 |
Natural Gas Fixed Price Swaps [Member] | Fixed Price Seven [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Production volume covered per month - Natural Gas | 140,000 | 40,000 |
Contract price | 4.11 | 3.655 |
Natural Gas Fixed Price Swaps [Member] | Fixed Price Eight [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Production volume covered per month - Natural Gas | 50,000 | 100,000 |
Contract price | 4.2 | 4.32 |
Natural Gas Fixed Price Swaps [Member] | Fixed Price Nine [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Production volume covered per month - Natural Gas | 50,000 | ' |
Contract price | 4.18 | ' |
Natural Gas Fixed Price Swaps [Member] | Fixed Price Ten [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Production volume covered per month - Natural Gas | 50,000 | ' |
Contract price | 4.21 | ' |
Natural Gas Fixed Price Swaps [Member] | Fixed Price Eleven [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Production volume covered per month - Natural Gas | 30,000 | ' |
Contract price | 4.3 | ' |
Natural Gas Fixed Price Swaps [Member] | Fixed Price Twelve [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Production volume covered per month - Natural Gas | 40,000 | ' |
Contract price | 4.61 | ' |
Oil Costless Collars [Member] | Fixed Price Nine [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Production volume covered per month - Oil | ' | 3,000 |
Oil Costless Collars [Member] | Fixed Price Ten [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Production volume covered per month - Oil | ' | 4,000 |
Oil Costless Collars [Member] | Fixed Price Eleven [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Production volume covered per month - Oil | ' | 2,000 |
Oil Costless Collars [Member] | Fixed Price Twelve [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Production volume covered per month - Oil | ' | 4,000 |
Oil Costless Collars [Member] | Fixed Price Thirteen [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Production volume covered per month - Oil | 4,000 | ' |
Oil Costless Collars [Member] | Fixed Price Fourteen [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Production volume covered per month - Oil | 4,000 | ' |
Oil Costless Collars [Member] | Fixed Price Fifteen [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Production volume covered per month - Oil | 3,667 | ' |
Oil Fixed Price Swaps [Member] | Fixed Price Thirteen [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Production volume covered per month - Oil | ' | 4,000 |
Contract price | ' | 105.25 |
Oil Fixed Price Swaps [Member] | Fixed Price Sixteen [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Production volume covered per month - Natural Gas | 3,000 | ' |
Contract price | 94.5 | ' |
Oil Fixed Price Swaps [Member] | Fixed Price Seventeen [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Production volume covered per month - Oil | 4,000 | ' |
Contract price | 95.25 | ' |
Minimum [Member] | Natural Gas Costless Collars [Member] | Fixed Price One [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Contract price | 4 | 3.75 |
Minimum [Member] | Natural Gas Costless Collars [Member] | Fixed Price Two [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Contract price | 3.25 | 3.75 |
Minimum [Member] | Natural Gas Costless Collars [Member] | Fixed Price Three [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Contract price | 3.5 | 3.75 |
Minimum [Member] | Natural Gas Costless Collars [Member] | Fixed Price Four [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Contract price | 3.75 | 4 |
Minimum [Member] | Natural Gas Costless Collars [Member] | Fixed Price Five [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Contract price | 3.75 | ' |
Minimum [Member] | Oil Costless Collars [Member] | Fixed Price Nine [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Contract price | ' | 90 |
Minimum [Member] | Oil Costless Collars [Member] | Fixed Price Ten [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Contract price | ' | 90 |
Minimum [Member] | Oil Costless Collars [Member] | Fixed Price Eleven [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Contract price | ' | 90 |
Minimum [Member] | Oil Costless Collars [Member] | Fixed Price Twelve [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Contract price | ' | 90 |
Minimum [Member] | Oil Costless Collars [Member] | Fixed Price Thirteen [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Contract price | 90 | ' |
Minimum [Member] | Oil Costless Collars [Member] | Fixed Price Fourteen [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Contract price | 85 | ' |
Minimum [Member] | Oil Costless Collars [Member] | Fixed Price Fifteen [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Contract price | 85 | ' |
Maximum [Member] | Natural Gas Costless Collars [Member] | Fixed Price One [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Contract price | 4.55 | 4.25 |
Maximum [Member] | Natural Gas Costless Collars [Member] | Fixed Price Two [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Contract price | 3.9 | 4.3 |
Maximum [Member] | Natural Gas Costless Collars [Member] | Fixed Price Three [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Contract price | 4.3 | 4.05 |
Maximum [Member] | Natural Gas Costless Collars [Member] | Fixed Price Four [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Contract price | 4.35 | 4.55 |
Maximum [Member] | Natural Gas Costless Collars [Member] | Fixed Price Five [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Contract price | 4.5 | ' |
Maximum [Member] | Oil Costless Collars [Member] | Fixed Price Nine [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Contract price | ' | 102 |
Maximum [Member] | Oil Costless Collars [Member] | Fixed Price Ten [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Contract price | ' | 101.5 |
Maximum [Member] | Oil Costless Collars [Member] | Fixed Price Eleven [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Contract price | ' | 97.5 |
Maximum [Member] | Oil Costless Collars [Member] | Fixed Price Twelve [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Contract price | ' | 101.5 |
Maximum [Member] | Oil Costless Collars [Member] | Fixed Price Thirteen [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Contract price | 101.5 | ' |
Maximum [Member] | Oil Costless Collars [Member] | Fixed Price Fourteen [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Contract price | 100 | ' |
Maximum [Member] | Oil Costless Collars [Member] | Fixed Price Fifteen [Member] | ' | ' |
Derivative [Line Items] | ' | ' |
Contract price | 99 | ' |