Summary of Significant Accounting Policies - Changes in Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Financing Receivable, Allowance for Credit Loss [Line Items]
Receivable, threshold period past due	20 days
ACCOUNTS RECEIVABLE
Accounts receivable, beginning balance	$ 1,147	$ 1,302
Current period provision	1,240	391
Charge-offs	(1,637)	(1,089)
Recovery	377	398
Accounts receivable, ending balance	1,127	1,002
OTHER
Other, beginning balance	1,638	1,638
Current period provision	0	0
Charge-offs	0	0
Recovery	0	0
Other, ending balance	1,638	1,638
TOTAL
Total, beginning balance	2,785	2,940
Current period provision	1,240	391
Charge-offs	(1,637)	(1,089)
Recovery	377	398
Total, ending balance	2,765	2,640
CLECO POWER
ACCOUNTS RECEIVABLE
Accounts receivable, beginning balance	1,147	1,302
Current period provision	1,240	391
Charge-offs	(1,637)	(1,089)
Recovery	377	398
Accounts receivable, ending balance	$ 1,127	$ 1,002