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Oil and Gas Properties (Details) (USD $)	12 Months Ended
Oil and Gas Properties (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Oil And Gas Properties Details
Unproven properties	$ 537,501	$ 530,539
Depreciation and impairment	(513,374)	(511,847)
Oil and gas properties, net	24,127	18,692
Unproven properties, changes	6,962	599
Depreciation and impairment, changes	1,527	3,264
Oil and gas properties, net, changes	$ 5,435

- 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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- Definition

The cash outflow to purchase of mineral interests in oil and gas properties for use in the normal oil and gas operations and not intended for resale.

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