Leases - Supplemental Balance Sheet and Cash Flow Information and Other Supplemental Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
ROU assets
Operating	$ 24,014	$ 26,172
Finance	12,600	13,720
Total ROU assets	36,614	39,892
Current lease liabilities
Operating	2,854	2,802
Finance	755	682
Non-current lease liabilities
Operating	21,128	23,333
Finance	13,807	14,562
Total lease liabilities	38,544	41,379
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	3,938	4,504
Operating cash flows from finance leases	1,521	1,587
Financing cash flows from finance leases	$ 682	$ 617
Operating leases
Weighted average remaining lease term (in years)	9 years	9 years 10 months 24 days
Weighted-average discount rate	4.30%	4.31%
Finance leases
Weighted average remaining lease term (in years)	11 years 3 months 18 days	12 years 3 months 18 days
Weighted-average discount rate	10.18%	10.18%
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property, plant, and equipment	Property, plant, and equipment
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other current liabilities	Other current liabilities
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Long-term debt outstanding, due within one year	Long-term debt outstanding, due within one year
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Long-term debt and finance leases, net	Long-term debt and finance leases, net
CLECO POWER
ROU assets
Operating	$ 23,970	$ 26,006
Finance	12,600	13,720
Total ROU assets	36,570	39,726
Current lease liabilities
Operating	2,832	2,672
Finance	755	682
Non-current lease liabilities
Operating	21,100	23,295
Finance	13,807	14,562
Total lease liabilities	38,494	41,211
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	3,800	4,120
Operating cash flows from finance leases	1,521	1,587
Financing cash flows from finance leases	$ 682	$ 617
Operating leases
Weighted average remaining lease term (in years)	9 years	10 years
Weighted-average discount rate	4.30%	4.31%
Finance leases
Weighted average remaining lease term (in years)	11 years 3 months 18 days	12 years 3 months 18 days
Weighted-average discount rate	10.18%	10.18%
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property, plant, and equipment	Property, plant, and equipment
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other current liabilities	Other current liabilities
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Long-term debt outstanding, due within one year	Long-term debt outstanding, due within one year
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Long-term debt and finance leases, net	Long-term debt and finance leases, net