Leases - Supplemental Balance Sheet and Cash Flow Information and Other Supplemental Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
ROU assets
Operating lease right of use assets	$ 20,070	$ 22,636
Finance	$ 10,360	$ 11,480
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property, plant, and equipment	Property, plant, and equipment
Total ROU assets	$ 30,430	$ 34,116
Current lease liabilities
Operating	$ 2,973	$ 2,912
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other current liabilities	Other current liabilities
Finance	$ 925	$ 836
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Long-term debt due within one year	Long-term debt due within one year
Non-current lease liabilities
Operating lease liabilities	$ 17,276	$ 19,790
Finance	$ 12,046	$ 12,971
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Long-term debt and finance leases, net	Long-term debt and finance leases, net
Total lease liabilities	$ 33,220	$ 36,509
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	3,571	3,696
Operating cash flows from finance leases	1,367	1,448
Financing cash flows from finance leases	$ 836	$ 755
Operating leases
Weighted-average remaining lease term	12 years 2 months 12 days	12 years 6 months
Weighted-average discount rate	4.30%	4.36%
Finance leases
Weighted-average remaining lease term	9 years 3 months 18 days	10 years 3 months 18 days
Weighted-average discount rate	10.18%	10.18%
CLECO POWER
ROU assets
Operating lease right of use assets	$ 20,070	$ 22,628
Finance	$ 10,360	$ 11,480
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property, plant, and equipment	Property, plant, and equipment
Total ROU assets	$ 30,430	$ 34,108
Current lease liabilities
Operating	$ 2,973	$ 2,903
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other current liabilities	Other current liabilities
Finance	$ 925	$ 836
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Long-term debt due within one year	Long-term debt due within one year
Non-current lease liabilities
Operating lease liabilities	$ 17,276	$ 19,790
Finance	$ 12,046	$ 12,971
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Long-term debt and finance leases, net	Long-term debt and finance leases, net
Total lease liabilities	$ 33,220	$ 36,500
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	3,562	3,685
Operating cash flows from finance leases	1,367	1,448
Financing cash flows from finance leases	$ 836	$ 755
Operating leases
Weighted-average remaining lease term	12 years 2 months 12 days	11 years 4 months 24 days
Weighted-average discount rate	4.30%	4.35%
Finance leases
Weighted-average remaining lease term	9 years 3 months 18 days	10 years 3 months 18 days
Weighted-average discount rate	10.18%	10.18%