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Regulatory Assets and Liabilities, Summary of Regulatory Assets and Liabilities (Details) (Cleco Power [Member], USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Schedule of Regulatory Assets and Liabilities, Net [Line Items]    
Total regulatory assets, net $ 529,030 $ 510,688
Construction carrying costs - liability [Member]
   
Schedule of Regulatory Assets and Liabilities, Net [Line Items]    
Regulatory liabilities 0 (8,255)
Deferred Income Tax Charges [Member]
   
Schedule of Regulatory Assets and Liabilities, Net [Line Items]    
Regulatory assets 217,550 210,445
Total regulatory assets - other [Member]
   
Schedule of Regulatory Assets and Liabilities, Net [Line Items]    
Regulatory assets 304,629 300,665
Mining costs [Member]
   
Schedule of Regulatory Assets and Liabilities, Net [Line Items]    
Regulatory assets 14,657 16,569
Interest costs [Member]
   
Schedule of Regulatory Assets and Liabilities, Net [Line Items]    
Regulatory assets 6,033 6,304
Asset removal costs [Member]
   
Schedule of Regulatory Assets and Liabilities, Net [Line Items]    
Regulatory assets 919 867
Postretirement plan costs [Member]
   
Schedule of Regulatory Assets and Liabilities, Net [Line Items]    
Regulatory assets 146,597 156,458
Tree trimming costs [Member]
   
Schedule of Regulatory Assets and Liabilities, Net [Line Items]    
Regulatory assets 4,945 5,656
Training costs [Member]
   
Schedule of Regulatory Assets and Liabilities, Net [Line Items]    
Regulatory assets 7,214 7,330
Storm surcredits, net [Member]
   
Schedule of Regulatory Assets and Liabilities, Net [Line Items]    
Regulatory assets 16,738 6,211
Construction carrying costs - asset [Member]
   
Schedule of Regulatory Assets and Liabilities, Net [Line Items]    
Regulatory assets 0 4,697
Lignite mining agreement contingency [Member]
   
Schedule of Regulatory Assets and Liabilities, Net [Line Items]    
Regulatory assets 3,781 3,781
Power purchase agreement capacity costs [Member]
   
Schedule of Regulatory Assets and Liabilities, Net [Line Items]    
Regulatory assets 13,316 6,217
AMI Deferred Revenue Requirement [Member]
   
Schedule of Regulatory Assets and Liabilities, Net [Line Items]    
Regulatory assets 3,960 1,483
AFUDC equity gross-up [Member]
   
Schedule of Regulatory Assets and Liabilities, Net [Line Items]    
Regulatory assets 73,518 74,158
Rate case costs [Member]
   
Schedule of Regulatory Assets and Liabilities, Net [Line Items]    
Regulatory assets 179 581
Acadia Unit 1 acquisition costs [Member]
   
Schedule of Regulatory Assets and Liabilities, Net [Line Items]    
Regulatory assets 2,786 2,865
IRP/RFP costs [Member]
   
Schedule of Regulatory Assets and Liabilities, Net [Line Items]    
Regulatory assets 0 39
AMI pilot costs [Member]
   
Schedule of Regulatory Assets and Liabilities, Net [Line Items]    
Regulatory assets 0 22
Financing costs [Member]
   
Schedule of Regulatory Assets and Liabilities, Net [Line Items]    
Regulatory assets 9,864 7,282
Biomass costs [Member]
   
Schedule of Regulatory Assets and Liabilities, Net [Line Items]    
Regulatory assets 122 145
Fuel and purchased power [Member]
   
Schedule of Regulatory Assets and Liabilities, Net [Line Items]    
Regulatory assets $ 6,851 $ 7,833