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Common Stock, Stock-Based Compensation (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Pre-Tax Compensation Expense $ 6,110 $ 6,308 $ 6,148
Tax Benefit 2,351 2,427 2,366
Compensation expense, non-forfeitable dividends paid on non-vested stock not expected to vest and stock options 100 100 100
Amount of stock based compensation capitalized in property, plant, and equipment 800 800  
Equity Classification [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Pre-Tax Compensation Expense 6,110 6,308 6,147
Restricted Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Pre-Tax Compensation Expense $ 6,110 $ 6,308 6,147
Non-vested share-based compensation arrangements expected to vest (in shares) 269,988 301,049  
Common Stock Equivalent Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Pre-Tax Compensation Expense $ 0 $ 0 1
Cleco Power [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Pre-Tax Compensation Expense 2,000 2,004 1,754
Tax Benefit 770 771 675
Amount of stock based compensation capitalized in property, plant, and equipment 700 800  
Cleco Power [Member] | Equity Classification [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Pre-Tax Compensation Expense 2,000 2,004 1,754
Cleco Power [Member] | Restricted Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Pre-Tax Compensation Expense 2,000 2,004 1,754
Cleco Power [Member] | Common Stock Equivalent Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Pre-Tax Compensation Expense $ 0 $ 0 $ 0
LTICP [Member] | Restricted Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Non-vested share-based compensation arrangements expected to vest (in shares) 145,979    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 1 year 5 months    
Non-Vested Stock, total unrecognized before-tax compensation cost $ 6,700