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Oil And Gas Properties (Capitalized Exploratory Project Costs) (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
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Capitalized Costs Relating to Oil and Gas Producing Activities, by Geographic Area [Line Items] |  |  |  |  |  |
Capitalized Exploratory Well Costs | $ 8,247 |  | $ 5,840 |  | $ 3,252 | $ 3,059
T-6 [Member] |  |  |  |  |  |
Capitalized Costs Relating to Oil and Gas Producing Activities, by Geographic Area [Line Items] |  |  |  |  |  |
Capitalized Exploratory Well Costs | 8,122 | [1] |  |  |  |
Wang [Member] |  |  |  |  |  |
Capitalized Costs Relating to Oil and Gas Producing Activities, by Geographic Area [Line Items] |  |  |  |  |  |
Capitalized Exploratory Well Costs |  |  | 3,096 | [1] |  |
Danny 2 [Member] |  |  |  |  |  |
Capitalized Costs Relating to Oil and Gas Producing Activities, by Geographic Area [Line Items] |  |  |  |  |  |
Capitalized Exploratory Well Costs |  |  | 2,619 |  |  |
Other [Member] |  |  |  |  |  |
Capitalized Costs Relating to Oil and Gas Producing Activities, by Geographic Area [Line Items] |  |  |  |  |  |
Capitalized Exploratory Well Costs | $ 125 |  | $ 125 |  |  |
[1] | Both of these wells are located within the Phoenix field at Green Canyon Block 237.

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- Definition The amount of capitalized exploratory well costs that is pending the determination of proved reserves. This does not include amounts that were capitalized and subsequently expensed in the same annual period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 1B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=8451039&loc=SL6806780-109447 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS19-1 -Paragraph 10 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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