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Income Taxes (Details)	6 Months Ended
Income Taxes (Details)	Jun. 30, 2012	Jun. 30, 2011
Effective Tax Rate Reconciliation [Abstract]
Statutory rate	35.00%	35.00%
Effective income tax rate	71.00%	60.00%
Statutory Income Tax rate in Libya	in excess of 90 percent
Effective income tax rate excluding Libya	64.00%

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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- Definition

The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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