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Litigation, Other Commitments and Contingencies, and Disclosures about Guarantees - Fuel Transportation Agreement and Capital Leases (Details) - CLECO POWER
$ in Thousands
12 Months Ended
Apr. 02, 2018
USD ($)
Dec. 31, 2018
USD ($)
event
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2012
barge
Barges          
Capital Leased Assets [Line Items]          
Number of barges | barge         42
Repayment of capital lease obligation for barges   $ 2,000 $ 2,500 $ 3,700  
Revenue received from subleases of barges to third parties   $ 500 300 $ 100  
Number of cancellation events triggering early termination | event   1      
Number of cancellation events | event   4      
Analysis of leased property under capital leases by major classes [Abstract]          
Barges   $ 16,800 0    
Less: accumulated amortization   840 0    
Capital lease assets, net   $ 15,960 $ 0    
Savage Inland Marine          
Capital Leased Assets [Line Items]          
Payments to Fund Long-term Loans to Related Parties $ 16,800