Summary of Significant Accounting Policies - Changes in Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Financing Receivable, Allowance for Credit Loss [Line Items]
Receivable, threshold period past due	20 days		20 days
ACCOUNTS RECEIVABLE
Accounts receivable, beginning balance	$ 1,190	$ 1,334	$ 1,302	$ 2,758
Current period provision	939	567	2,149	3,057
Charge-offs	(894)	(730)	(2,899)	(5,172)
Recovery	263	586	946	1,114
Accounts receivable, ending balance	1,498	1,757	1,498	1,757
OTHER
Other, beginning balance	1,638	1,638	1,638	1,638
Current period provision	0	0	0	0
Charge-offs	0	0	0	0
Recovery	0	0	0	0
Other, ending balance	1,638	1,638	1,638	1,638
TOTAL
Total, beginning balance	2,828	2,972	2,940	4,396
Current period provision	939	567	2,149	3,057
Charge-offs	(894)	(730)	(2,899)	(5,172)
Recovery	263	586	946	1,114
Total, ending balance	3,136	3,395	3,136	3,395
CLECO POWER
ACCOUNTS RECEIVABLE
Accounts receivable, beginning balance	1,190	1,334	1,302	2,758
Current period provision	939	567	2,149	3,057
Charge-offs	(894)	(730)	(2,899)	(5,172)
Recovery	263	586	946	1,114
Accounts receivable, ending balance	$ 1,498	$ 1,757	$ 1,498	$ 1,757