|
Property And Equipment (Summary Of Oil And Gas Properties Not Subject To Amortization) (Details) (USD $)
In Thousands, unless otherwise specified |
9 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Sep. 30, 2012
|
Dec. 31, 2011
|
Sep. 30, 2012
Minimum [Member]
|
Sep. 30, 2012
Maximum [Member]
|
Sep. 30, 2012
West Texas Permian
|
Sep. 30, 2012
Colorado
|
Sep. 30, 2012
Bakken
|
Sep. 30, 2012
Southern Louisiana
|
Sep. 30, 2012
Ohio
|
Sep. 30, 2012
Belize
|
Sep. 30, 2012
Other
|
|
| Capitalized Costs of Unproved Properties Excluded from Amortization [Line Items] | |||||||||||
| Anticipated Timing of Inclusion of Costs in Amortization Calculation | 3 years | 5 years | |||||||||
| Capitalized costs of oil and natural gas properties excluded from amortization | $ 234,630 | $ 138,623 | $ 14,661 | $ 5,871 | $ 300 | $ 761 | $ 207,281 | $ 5,711 | $ 45 | ||