XML 44 R35.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Property And Equipment (Summary Of Oil And Gas Properties Not Subject To Amortization) (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2013 | Dec. 31, 2012 | Mar. 31, 2012
--- | --- | --- | ---
Capitalized Costs of Unproved Properties Excluded from Amortization [Line Items] |  |  |
Capitalized costs of oil and natural gas properties excluded from amortization | $ 869,879 | $ 626,300 | $ 626,295
Colorado [Member] |  |  |
Capitalized Costs of Unproved Properties Excluded from Amortization [Line Items] |  |  |
Capitalized costs of oil and natural gas properties excluded from amortization | 6,088 |  |
Bakken [Member] |  |  |
Capitalized Costs of Unproved Properties Excluded from Amortization [Line Items] |  |  |
Capitalized costs of oil and natural gas properties excluded from amortization | 301 |  |
Southern Louisiana [Member] |  |  |
Capitalized Costs of Unproved Properties Excluded from Amortization [Line Items] |  |  |
Capitalized costs of oil and natural gas properties excluded from amortization | 789 |  |
Ohio [Member] |  |  |
Capitalized Costs of Unproved Properties Excluded from Amortization [Line Items] |  |  |
Capitalized costs of oil and natural gas properties excluded from amortization | 862,655 |  |
Other [Member] |  |  |
Capitalized Costs of Unproved Properties Excluded from Amortization [Line Items] |  |  |
Capitalized costs of oil and natural gas properties excluded from amortization | $ 46 |  |

X
- Definition The sum of the capitalized costs incurred, as of the balance sheet date, of unproved properties excluded from amortization including acquisition costs, exploration costs, development costs, and production costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-10.(c)(7)(ii)) -URI http://asc.fasb.org/extlink&oid=21918352&loc=d3e511914-122862 + Details
Name: | us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration