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Affiliate Transactions (Details) (Cleco Power [Member], USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Related Party Transaction [Line Items]    
Accounts payable - affiliate $ 11,172 $ 9,311
Accounts receivable - affiliate 4,051 2,405
Cleco Corporation [Member]
   
Related Party Transaction [Line Items]    
Accounts payable - affiliate 2,300  
Accounts receivable - affiliate 1,600  
Support Group [Member]
   
Related Party Transaction [Line Items]    
Accounts payable - affiliate 7,400  
Accounts receivable - affiliate 2,400  
Evangeline [Member]
   
Related Party Transaction [Line Items]    
Accounts payable - affiliate 1,500  
Others [Member]
   
Related Party Transaction [Line Items]    
Accounts receivable - affiliate 100  
Maximum [Member] | Others [Member]
   
Related Party Transaction [Line Items]    
Accounts payable - affiliate $ 100