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Variable Interest Entities, Ownership Interest (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Apr. 29, 2011
Acadia Power Partners [Member]
APH [Member]
Apr. 29, 2011
Cajun [Member]
APH [Member]
Dec. 31, 2012
Maximum [Member]
Subsidiaries less than 100% owned by Cleco Innovations LLC [Member]
Significant Acquisitions and Disposals [Line Items]            
Equity Method Investments $ 14,540 $ 14,540 $ 86,732     $ 100
Ownership interest received (in hundredths)       100.00%    
Ownership interest exchanged (in hundredths)         50.00%