Supplementary Information on Oil And Gas Producing Activities (Unaudited) - Additional Information (Detail) |
12 Months Ended | |
|---|---|---|
|
Dec. 31, 2015
$ / MMBTU
$ / bbl
|
Dec. 31, 2014
$ / MMBTU
$ / bbl
|
|
| Contingencies [Line Items] | ||
| Discount Rate to determine future cash flows | 10.00% | 10.00% |
| Gas [Member] | ||
| Contingencies [Line Items] | ||
| Price for oil and gas | $ / MMBTU | 1.43 | 3.31 |
| Oil [Member] | ||
| Contingencies [Line Items] | ||
| Price for oil and gas | 50.28 | 94.99 |
| NGL [Member] | ||
| Contingencies [Line Items] | ||
| Price for oil and gas | 12.09 | 41.74 |