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Income Taxes, Income Tax Uncertainties (Details) (USD $)
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2012
Uncertain Tax Positions [Abstract]      
Interest payable associated with uncertain tax positions $ 1,352,000   $ 1,420,000
Interest charges related to uncertain tax positions (69,000) (5,640,000)  
Cleco Power [Member]
     
Uncertain Tax Positions [Abstract]      
Interest payable associated with uncertain tax positions 3,479,000   3,358,000
Customer surcredits 6,900,000   6,200,000
Interest charges related to uncertain tax positions $ 121,000 $ (7,366,000)