Summary of Significant Accounting Policies - Changes in Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Financing Receivable, Allowance for Credit Loss [Line Items]
Receivable, threshold period past due	20 days		20 days
ACCOUNTS RECEIVABLE
Accounts receivable, beginning balance	$ 1,127	$ 1,002	$ 1,147	$ 1,302
Current period provision	906	819	2,146	1,210
Charge-offs	(1,108)	(916)	(2,746)	(2,005)
Recovery	327	285	705	683
Accounts receivable, ending balance	1,252	1,190	1,252	1,190
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	2,765	2,640	2,785	2,940
Current period provision	906	819	2,146	1,210
Charge-offs	(1,108)	(916)	(2,746)	(2,005)
Recovery	327	285	705	683
Total, ending balance	2,890	2,828	2,890	2,828
CLECO POWER
ACCOUNTS RECEIVABLE
Accounts receivable, beginning balance	1,127	1,002	1,147	1,302
Current period provision	906	819	2,146	1,210
Charge-offs	(1,108)	(916)	(2,746)	(2,005)
Recovery	327	285	705	683
Accounts receivable, ending balance	$ 1,252	$ 1,190	$ 1,252	$ 1,190