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Supplemental Oil And Gas Information (Schedule Of Capitalized Costs Related To Oil And Gas Producing Activities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Supplemental Oil And Gas Information [Abstract]
Proved oil and gas properties	$ 43,351	$ 36,002
Unproved properties	457	268
Total proved and unproved oil and gas properties	43,808	36,270
Less accumulate depreciation, depletion and amortization	(19,108)	(16,064)
Net oil and gas properties	$ 24,700	$ 20,206

Capitalized costs of proved properties incurred for any combination mineral interests acquisitions; wells and related equipment; support equipment and facilities; and uncompleted wells and equipment and other costs not previously disclosed within this table.

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- Definition

Capitalized costs of unproved properties incurred for any combination mineral interests acquisitions and other costs not previously disclosed within this table.

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