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Fair Value of Financial and Derivatives Instruments - Commodity Derivative Volumes and Prices (Detail)
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Sep. 30, 2013
bbl
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|---|---|
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Crude Oil Basis Differential -2013 [Member] | Swap [Member]
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|
| Derivative [Line Items] | |
| Volume Transacted | 2,300 |
| Contract Price | 1.10 |
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Crude Oil Basis Differential -2014 [Member] | Swap [Member]
|
|
| Derivative [Line Items] | |
| Volume Transacted | 1,500 |
| Contract Price | 0.55 |
|
Propane - 2013 [Member] | Swap [Member]
|
|
| Derivative [Line Items] | |
| Volume Transacted | 550 |
| Contract Price | 42.00 |
|
Propane - 2014 [Member] | Swap [Member]
|
|
| Derivative [Line Items] | |
| Volume Transacted | 500 |
| Contract Price | 41.16 |
|
Natural Gasoline -2013 [Member] | Swap [Member]
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| Derivative [Line Items] | |
| Volume Transacted | 200 |
| Contract Price | 90.72 |
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Natural Gasoline -2014 [Member] | Swap [Member]
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|
| Derivative [Line Items] | |
| Volume Transacted | 175 |
| Contract Price | 83.37 |
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Natural Gas - 2013 Contract One [Member] | Swap [Member]
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| Derivative [Line Items] | |
| Volume Transacted | 200,000 |
| Contract Price | 3.54 |
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Natural Gas - 2013 Contract Two [Member] | Swap [Member]
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|
| Derivative [Line Items] | |
| Volume Transacted | 190,000 |
| Contract Price | 3.80 |
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Natural Gas Contracts [Member] | Collar [Member]
|
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| Derivative [Line Items] | |
| Volume Transacted | 100,000 |
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Natural Gas - 2014 [Member] | Swap [Member]
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|
| Derivative [Line Items] | |
| Volume Transacted | 360,000 |
| Contract Price | 4.18 |
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Crude Oil - 2013 Contract One [Member] | Collar [Member]
|
|
| Derivative [Line Items] | |
| Volume Transacted | 650 |
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Crude Oil - 2013 Contract Two [Member] | Collar [Member]
|
|
| Derivative [Line Items] | |
| Volume Transacted | 450 |
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Crude Oil 2013 - Contract Three [Member] | Collar [Member]
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|
| Derivative [Line Items] | |
| Volume Transacted | 1,200 |
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Crude Oil - 2014 Contract One [Member] | Collar [Member]
|
|
| Derivative [Line Items] | |
| Volume Transacted | 550 |
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Crude Oil - 2014 Contract Two [Member] | Collar [Member]
|
|
| Derivative [Line Items] | |
| Volume Transacted | 950 |
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Crude Oil -2015 [Member] | Collar [Member]
|
|
| Derivative [Line Items] | |
| Volume Transacted | 2,600 |
|
Minimum [Member] | Natural Gas Contracts [Member] | Collar [Member]
|
|
| Derivative [Line Items] | |
| Contract Price | 4.00 |
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Minimum [Member] | Crude Oil - 2013 Contract One [Member] | Collar [Member]
|
|
| Derivative [Line Items] | |
| Contract Price | 90.00 |
|
Minimum [Member] | Crude Oil - 2013 Contract Two [Member] | Collar [Member]
|
|
| Derivative [Line Items] | |
| Contract Price | 90.00 |
|
Minimum [Member] | Crude Oil 2013 - Contract Three [Member] | Collar [Member]
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|
| Derivative [Line Items] | |
| Contract Price | 90.35 |
|
Minimum [Member] | Crude Oil - 2014 Contract One [Member] | Collar [Member]
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| Derivative [Line Items] | |
| Contract Price | 90.00 |
|
Minimum [Member] | Crude Oil - 2014 Contract Two [Member] | Collar [Member]
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|
| Derivative [Line Items] | |
| Contract Price | 85.05 |
|
Minimum [Member] | Crude Oil -2015 [Member] | Collar [Member]
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| Derivative [Line Items] | |
| Contract Price | 84.00 |
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Maximum [Member] | Natural Gas Contracts [Member] | Collar [Member]
|
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| Derivative [Line Items] | |
| Contract Price | 4.36 |
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Maximum [Member] | Crude Oil - 2013 Contract One [Member] | Collar [Member]
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| Derivative [Line Items] | |
| Contract Price | 105.80 |
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Maximum [Member] | Crude Oil - 2013 Contract Two [Member] | Collar [Member]
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| Derivative [Line Items] | |
| Contract Price | 101.45 |
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Maximum [Member] | Crude Oil 2013 - Contract Three [Member] | Collar [Member]
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| Derivative [Line Items] | |
| Contract Price | 100.35 |
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Maximum [Member] | Crude Oil - 2014 Contract One [Member] | Collar [Member]
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| Derivative [Line Items] | |
| Contract Price | 105.50 |
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Maximum [Member] | Crude Oil - 2014 Contract Two [Member] | Collar [Member]
|
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| Derivative [Line Items] | |
| Contract Price | 95.05 |
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Maximum [Member] | Crude Oil -2015 [Member] | Collar [Member]
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| Derivative [Line Items] | |
| Contract Price | 91.00 |