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Pension Plan and Employee Benefits - Amounts Recognized in Balance Sheet (Details) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]    
Current $ 26,439 $ 35,520
Non-current 166,702 196,321
Current 16,344 25,685
Non-current 69,250 91,638
CLECO POWER    
Defined Benefit Plan Disclosure [Line Items]    
Current 21,701 30,777
Non-current 109,464 132,321
Current 16,344 25,685
Non-current 69,250 91,638
OTHER BENEFITS    
Defined Benefit Plan Disclosure [Line Items]    
Current 5,279 5,241
Non-current 38,724 41,815
OTHER BENEFITS | CLECO POWER    
Defined Benefit Plan Disclosure [Line Items]    
Current 4,524 4,479
Non-current 30,054 32,289
SERP BENEFITS    
Defined Benefit Plan Disclosure [Line Items]    
Current 4,815 4,593
Non-current 58,728 62,868
SERP BENEFITS | CLECO POWER    
Defined Benefit Plan Disclosure [Line Items]    
Current 833 613
Non-current $ 10,160 $ 8,394