Pension Plan and Employee Benefits - Current and Non-Current Portions of the Other Benefits Liability (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Non-current	$ 291,606	$ 291,606
CLECO POWER
Defined Benefit Plan Disclosure [Line Items]
Non-current	205,651	205,214
Other Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Current	5,181	5,181
Non-current	49,605	50,093
Other Benefits Plan | CLECO POWER
Defined Benefit Plan Disclosure [Line Items]
Current	4,432	4,432
Non-current	$ 38,943	$ 39,315