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Affiliate Transactions (Details) (Cleco Power [Member], USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Related Party Transaction [Line Items]    
Accounts payable - affiliate $ 10,069 $ 9,311
Accounts receivable - affiliate 3,373 2,405
Cleco Corporation [Member]
   
Related Party Transaction [Line Items]    
Accounts payable - affiliate 800  
Accounts receivable - affiliate 1,300  
Support Group [Member]
   
Related Party Transaction [Line Items]    
Accounts payable - affiliate 5,700  
Accounts receivable - affiliate 2,000  
Evangeline [Member]
   
Related Party Transaction [Line Items]    
Accounts payable - affiliate 3,500  
Maximum [Member] | Others [Member]
   
Related Party Transaction [Line Items]    
Accounts payable - affiliate 100  
Accounts receivable - affiliate $ 100