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Discontinued Operations (Narrative) (Details) (Carrizo United Kingdom [Member], USD $)
Sep. 30, 2014
Dec. 31, 2013
Feb. 22, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Percentage of non-operating working interest and overriding royalty interests     15.00%
Discontinued Operations, Sale Price     $ 184,000,000
Liabilities of disposal group, including discontinued operation 20,800,000 28,300,000  
Huntington Field Development Project Credit Facility [Member]
     
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Line of Credit Facility, Amount Outstanding     $ 55,000,000