Pension Plan and Employee Benefits - Current and Non-Current Portions of SERP Liability (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Non-current	$ 200,699	$ 200,665
SERP Benefits
Defined Benefit Plan Disclosure [Line Items]
Current	4,713	4,713
Non-current	63,561	63,714
CLECO POWER
Defined Benefit Plan Disclosure [Line Items]
Non-current	137,891	137,754
CLECO POWER | SERP Benefits
Defined Benefit Plan Disclosure [Line Items]
Current	672	672
Non-current	$ 8,997	$ 9,087