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Regulation and Rates (Details) - USD ($)
$ in Thousands
1 Months Ended 15 Months Ended 53 Months Ended
Sep. 30, 2015
Sep. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Regulation and Rates [Line Items]        
Provision for rate refund $ 4,164 $ 4,164   $ 2,264
Cleco Power [Member]        
Regulation and Rates [Line Items]        
Provision for rate refund 4,164 4,164   $ 2,264
Cleco Power [Member] | FERC [Member] | ROE reduction of transmission rates [Member]        
Regulation and Rates [Line Items]        
Provision for rate refund 2,800 2,800    
Cleco Power [Member] | LPSC [Member] | Energy Efficiency Programs [Member]        
Regulation and Rates [Line Items]        
Provision for rate refund 1,200 1,200    
Cleco Power [Member] | LPSC [Member] | Monitoring report for the 12-month period ended June 30, 2015 [Member]        
Regulation and Rates [Line Items]        
Provision for rate refund 200 $ 200    
Cleco Power [Member] | LPSC [Member] | 2010 FRP [Member]        
Regulation and Rates [Line Items]        
Target ROE allowed by FRP (in hundredths)     10.70%  
Percentage of retail earnings within range to be returned to customers (in hundredths)     60.00%  
ROE for customer credit, low range (in hundredths)     11.30%  
ROE for customer credit, high range (in hundredths)     12.30%  
Cleco Power [Member] | LPSC [Member] | FRP extension [Member]        
Regulation and Rates [Line Items]        
Target ROE allowed by FRP (in hundredths)   10.00%    
Percentage of retail earnings within range to be returned to customers (in hundredths)   60.00%    
ROE for customer credit, low range (in hundredths)   10.90%    
ROE for customer credit, high range (in hundredths)   11.75%    
Cleco Power [Member] | LPSC [Member] | Monitoring report for the 12-month period ended June 30, 2014 [Member]        
Regulation and Rates [Line Items]        
Refunds issued $ 1,600      
Maximum [Member] | Cleco Power [Member] | LPSC [Member] | 2010 FRP [Member]        
Regulation and Rates [Line Items]        
Target ROE allowed by FRP (in hundredths)     11.30%  
Maximum [Member] | Cleco Power [Member] | LPSC [Member] | FRP extension [Member]        
Regulation and Rates [Line Items]        
Target ROE allowed by FRP (in hundredths)   10.90%