Summary of Significant Accounting Policies - Changes in Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 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	$ 1,002	$ 2,040	$ 1,302	$ 2,758
Current period provision	819	616	1,210	2,490
Charge-offs	(916)	(1,583)	(2,005)	(4,442)
Recovery	285	261	683	528
Accounts receivable, ending balance	1,190	1,334	1,190	1,334
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	2,640	3,678	2,940	4,396
Current period provision	819	616	1,210	2,490
Charge-offs	(916)	(1,583)	(2,005)	(4,442)
Recovery	285	261	683	528
Total, ending balance	2,828	2,972	2,828	2,972
CLECO POWER
ACCOUNTS RECEIVABLE
Accounts receivable, beginning balance	1,002	2,040	1,302	2,758
Current period provision	819	616	1,210	2,490
Charge-offs	(916)	(1,583)	(2,005)	(4,442)
Recovery	285	261	683	528
Accounts receivable, ending balance	$ 1,190	$ 1,334	$ 1,190	$ 1,334