|
Supplemental Information On Oil And Gas Exploration And Production Activities (Capitalized Costs Related To Oil And Gas Producing Activities) (Details) (USD $)
|
Dec. 31, 2011
|
Dec. 31, 2010
|
|---|---|---|
| Supplemental Information On Oil And Gas Exploration And Production Activities [Abstract] | ||
| Proven properties | $ 897,130,000 | $ 730,566,000 |
| Unproven properties | 132,912,000 | 11,756,000 |
| Gross capitalized costs | 1,030,042,000 | 742,322,000 |
| Accumulated depreciation, depletion, amortization and impairment reserve | (571,213,000) | (509,248,000) |
| Net capitalized costs | $ 458,829,000 | $ 233,074,000 |
| X | ||||||||||
|
- Definition
Amount of accumulated depreciation, depletion, amortization and valuation allowance relating to oil and gas producing activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
The sum of capitalized costs relating to oil and gas producing activities before accounting for accumulated depreciation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Net amount of capitalized costs relating to oil and gas producing activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Capitalized costs of proved properties incurred for any combination mineral interests acquisitions; wells and related equipment; support equipment and facilities; and uncompleted wells and equipment and other costs not previously disclosed within this table. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Capitalized costs of unproved properties incurred for any combination mineral interests acquisitions and other costs not previously disclosed within this table. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|