Pension Plan and Employee Benefits - Current and Non-Current Portions of SERP Liability (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Non-current	$ 290,638	$ 291,606
SERP Benefits
Defined Benefit Plan Disclosure [Line Items]
Current	4,654	4,654
Non-current	86,579	88,523
CLECO POWER
Defined Benefit Plan Disclosure [Line Items]
Non-current	206,150	205,214
CLECO POWER | SERP Benefits
Defined Benefit Plan Disclosure [Line Items]
Current	679	679
Non-current	$ 12,667	$ 12,909