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Commitments and Contingencies (Contingencies) (Details) (USD $)
In Millions, unless otherwise specified |
0 Months Ended | 36 Months Ended | 1 Months Ended | 0 Months Ended | 4 Months Ended | 0 Months Ended | ||||
|---|---|---|---|---|---|---|---|---|---|---|
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Apr. 20, 2009
Louisiana Department of Revenue Tax Litigation [Member]
|
Dec. 31, 2007
Louisiana Department of Revenue Tax Litigation [Member]
|
Dec. 31, 2010
Louisiana Department of Revenue Tax Litigation [Member]
lawsuit
|
Nov. 30, 2006
Cudd Pressure Control Litigation [Member]
defendant
|
Dec. 09, 2010
Reed Litigation [Member]
defendant
plaintiff
acre
|
Jul. 31, 2010
Reed Litigation [Member]
plaintiff
|
Dec. 07, 2010
Reed Litigation [Member]
defendant
acre
|
Dec. 06, 2010
Reed Litigation [Member]
acre
|
Jul. 31, 2010
Individual Counterparty [Member]
Reed Litigation [Member]
plaintiff
|
Jul. 31, 2010
Limited Liability Company [Member]
Reed Litigation [Member]
plaintiff
|
|
| Loss Contingencies [Line Items] | ||||||||||
| Alleged severance tax | $ 1.8 | |||||||||
| Lawsuits filed value | $ 2.3 | |||||||||
| Number of pending claims | 2 | |||||||||
| Number of defendants | 6 | 6 | 15 | 21 | ||||||
| Number of plaintiffs | 4 | 6 | 1 | |||||||
| Original number of acreage in litigation | 240 | |||||||||
| Amended number of acreage in litigation | 1,700 | |||||||||