Pension Plan and Employee Benefits - Schedule of Current and Non-Current Portions of SERP Liability (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Defined Benefit Plan Disclosure [Line Items]
Current	$ 13,865	$ 26,439
Non-current	161,662	166,702
CLECO POWER
Defined Benefit Plan Disclosure [Line Items]
Current	9,127	21,701
Non-current	104,685	109,464
SERP Benefits
Defined Benefit Plan Disclosure [Line Items]
Current	4,815	4,815
Non-current	58,459	58,728
SERP Benefits | CLECO POWER
Defined Benefit Plan Disclosure [Line Items]
Current	833	833
Non-current	$ 10,095	$ 10,160