Property and Equipment (Details 1) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 2013 [Member]	Dec. 31, 2012 2012 [Member]	Dec. 31, 2011 2011 [Member]	Dec. 31, 2010 2010 and prior [Member]	Dec. 31, 2013 Projects Inception to Date [Member]
Breakdown of the Company's unproved and unevaluated property costs not subject to amortization
Costs incurred for Property acquisition			$ 66,582	$ 22,944	$ 9,050	$ 77,355	$ 175,931
Exploration wells	12,901		12,901	247	1,932		15,080
Amount for development wells	3,145		3,145	0			3,145
Capitalized interest			0	150			150
Total unproved and unevaluated	$ 194,306	$ 149,675	$ 82,628	$ 23,341	$ 10,982	$ 77,355	$ 194,306

- Definition

The capitalized costs incurred (excluded from amortization), as of the date of the balance sheet, in identifying areas that may warrant examination and in examining specific areas that are considered to have prospects of containing oil and gas reserves, including costs of drilling exploratory wells and exploratory-type stratigraphic test wells. Exploration costs may be incurred both before acquiring the related property (sometimes referred to in part as prospecting costs) and after acquiring the property. Principal types of exploration costs, which include depreciation and applicable operating costs of support equipment and facilities and other costs of exploration activities, are: costs of topographical, geographical and geophysical studies, rights of access to properties to conduct those studies, and salaries and other expenses of geologists, geophysical crews, and others conducting those studies. Collectively, these are sometimes referred to as geological and geophysical or "G&G" costs. Exploration costs also include costs of carrying and retaining undeveloped properties, such as delay rentals, ad valorem taxes on properties, legal costs for title defense, the maintenance of land and lease records, dry hole contributions and bottom hole contributions, costs of drilling and equipping exploratory wells and costs of drilling exploratory-type stratigraphic test wells.

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