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Affiliate Transactions (Details) (USD $)
In Thousands
Jun. 30, 2011
Dec. 31, 2010
Related Party Transaction [Line Items]    
Receivable from affiliate $ 0 $ 831
Payable to affiliate 0 155
Cleco Power [Member]
   
Related Party Transaction [Line Items]    
Receivable from affiliate 2,537 2,738
Payable to affiliate 7,923 7,945
Cleco Power [Member] | Cleco Corporation [Member]
   
Related Party Transaction [Line Items]    
Receivable from affiliate 100  
Payable to affiliate 1,000  
Cleco Power [Member] | Support Group [Member]
   
Related Party Transaction [Line Items]    
Receivable from affiliate 2,300  
Payable to affiliate 6,900  
Cleco Power [Member] | Other Affiliates [Member]
   
Related Party Transaction [Line Items]    
Receivable from affiliate 100  
Payable to affiliate $ 0