|
Fair Value of Financial and Derivatives Instruments - Additional Information (Detail)
|
Jun. 30, 2013
bbl
|
|---|---|
|
Oil 2015 [Member]
|
|
| Fair Value Of Financial Instruments [Line Items] | |
| Volume transacted in commodity derivatives position | 2,600 |
|
Oil 2015 [Member] | Minimum [Member]
|
|
| Fair Value Of Financial Instruments [Line Items] | |
| Contract price in commodity derivatives position | 84.00 |
|
Oil 2015 [Member] | Maximum [Member]
|
|
| Fair Value Of Financial Instruments [Line Items] | |
| Contract price in commodity derivatives position | 91.00 |
|
Oil collars [Member]
|
|
| Fair Value Of Financial Instruments [Line Items] | |
| Number of contracts | 2 |