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Income Taxes (Details)
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Effective Tax Rate Reconciliation [Abstract]    
Effective income tax rate excluding Libya 53.00% 64.00%
Statutory rate 35.00% 35.00%
Effective income tax rate 52.00% 72.00%
Minimum [Member]
   
Income Taxes [Line Items]    
Libya Statutory Income Tax Rate 90.00% 90.00%