Regulatory Assets and Liabilities - Schedule of Regulatory Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Regulatory Liabilities [Line Items]
Total regulatory assets, net	$ 311,257	$ 311,525
CLECO POWER
Regulatory Liabilities [Line Items]
Total regulatory assets, net	158,413	152,549
CLECO POWER | Other Regulatory Assets (Liabilities)
Regulatory Liabilities [Line Items]
Regulatory assets	2,465
CLECO POWER | Corporate franchise tax, net
Regulatory Liabilities [Line Items]
Regulatory liabilities	(851)	(1,145)
CLECO POWER | Deferred taxes, net
Regulatory Liabilities [Line Items]
Regulatory liabilities	$ (147,779)	(146,948)
CLECO POWER | Other Regulatory Assets (Liabilities)
Regulatory Liabilities [Line Items]
Regulatory liabilities		$ (4,543)