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Property And Equipment (Summary Of Oil And Gas Properties Not Subject To Amortization) (Details) (USD $)	Mar. 31, 2012	Dec. 31, 2011
Capitalized costs of oil and natural gas properties excluded from amortization	$ 175,587,000	$ 138,623,000
West Texas Permian Properties [Member]
Capitalized costs of oil and natural gas properties excluded from amortization	13,843,000
Colorado Properties [Member]
Capitalized costs of oil and natural gas properties excluded from amortization	4,441,000
Bakken Properties [Member]
Capitalized costs of oil and natural gas properties excluded from amortization	304,000
Southern Louisiana Properties [Member]
Capitalized costs of oil and natural gas properties excluded from amortization	357,000
Ohio Properties [Member]
Capitalized costs of oil and natural gas properties excluded from amortization	150,887,000
Belize Properties [Member]
Capitalized costs of oil and natural gas properties excluded from amortization	5,711,000
Other Properties [Member]
Capitalized costs of oil and natural gas properties excluded from amortization	$ 44,000

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=6949603&loc=d3e511914-122862

+ Details

Name:	us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant