Fair Value Accounting and Financial Instruments - Net Changes in Net Fair Value of FTR Assets and Liabilities Classified as Level 3 (Details) - Price risk derivatives - Financial Transmission Right - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning balance	$ 3,180	$ 5,778
Unrealized gains	2,567	187
Purchases	12,061	11,333
Settlements	(11,665)	(14,118)
Ending balance	6,143	3,180
CLECO POWER
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning balance	3,216	5,725
Unrealized gains	2,828	450
Purchases	9,871	9,378
Settlements	(10,997)	(12,337)
Ending balance	$ 4,918	$ 3,216