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Stockholders' Equity (Details 3) (USD $) In Thousands, unless otherwise specified	35 Months Ended				3 Months Ended
	Jun. 30, 2013	Aug. 01, 2012 AWP	Jun. 30, 2013 Karlsson Group	Aug. 01, 2012 Karlsson Group	Jun. 30, 2013 Karlsson Group AWP	Aug. 01, 2012 Karlsson Group AWP
Non-Controlling Interest
Contribution of mineral interests	$ 11,000				$ 11,000
Percentage of ownership interest held by non-controlling owners			50.00%	50.00%	50.00%	50.00%
Ownership percentage		50.00%

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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- Definition

The value of the noncash (or part noncash) consideration given (for example, liability, equity) in a transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of a transaction not resulting in cash receipts or cash payments in the period.

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