Acquisition (Pro Forma) (Details) (Gulf of Mexico Acquisition [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Gulf of Mexico Acquisition [Member]
Business Acquisition [Line Items]
Revenues	$ 55,587	$ 46,384	$ 162,494	$ 132,303
Income (Loss) from Operations	4,318	(38,178)	15,487	(121,955)
Net Income (Loss) available to common stockholders	$ 3,014	$ (40,898)	$ 12,107	$ (127,306)
Basic Earnings per Share	$ 0.05	$ (0.65)	$ 0.19	$ (2.04)
Diluted Earnings per Share	$ 0.05	$ (0.65)	$ 0.19	$ (2.04)

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The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

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The pro forma income from continuing operations before changes in accounting and extraordinary items, net of tax effect, for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

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