|
Property and Equipment (Details) (USD $)
In Thousands, unless otherwise specified
|
Sep. 30, 2012
|
Dec. 31, 2011
|
| Oil and Gas Property, Full Cost Method, Net [Abstract] |
|
|
| Oil and Gas Property, Full Cost Method, Gross |
$ 1,075,938 |
$ 755,001 |
| Furniture and Fixtures, Gross |
8,744 |
6,421 |
| Property, Plant and Equipment, Gross |
1,084,682 |
761,422 |
| Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment |
(248,313) |
(212,226) |
| Property, Plant and Equipment, Net |
836,369 |
549,196 |
|
[UnProvedMember] | [CurrentYearMember]
|
|
|
| Oil and Gas Property, Full Cost Method, Net [Abstract] |
|
|
| Oil and Gas Property, Full Cost Method, Gross |
146,777 |
0 |
|
[UnProvedMember] | [OneYearPriorMember]
|
|
|
| Oil and Gas Property, Full Cost Method, Net [Abstract] |
|
|
| Oil and Gas Property, Full Cost Method, Gross |
114,274 |
138,912 |
|
[UnProvedMember] | [TwoYearPriorMember]
|
|
|
| Oil and Gas Property, Full Cost Method, Net [Abstract] |
|
|
| Oil and Gas Property, Full Cost Method, Gross |
44,095 |
47,208 |
|
[UnProvedMember] | [ThreeYearsAndPriorMember]
|
|
|
| Oil and Gas Property, Full Cost Method, Net [Abstract] |
|
|
| Oil and Gas Property, Full Cost Method, Gross |
54,432 |
72,214 |
|
[ProvedMember]
|
|
|
| Oil and Gas Property, Full Cost Method, Net [Abstract] |
|
|
| Oil and Gas Property, Full Cost Method, Gross |
$ 716,360 |
$ 496,667 |