Fair Value Accounting - Significant Unobservable Inputs Used in Developing Fair Value of Level 3 Positions (Details) $ in Thousands	Sep. 30, 2019 USD ($) $ / MW	Dec. 31, 2018 USD ($) $ / MW
Minimum
FAIR VALUE
FORWARD PRICE RANGE (usd per mwh) | $ / MW	(2.29)	(4.4)
Maximum
FAIR VALUE
FORWARD PRICE RANGE (usd per mwh) | $ / MW	3.14	15.1
Measured On A Recurring Basis | Level 3
FAIR VALUE
ASSETS	$ 9,926	$ 23,355
LIABILITIES	$ 1,257	$ 468
CLECO POWER | Minimum
FAIR VALUE
FORWARD PRICE RANGE (usd per mwh) | $ / MW	(1.67)	(4.4)
CLECO POWER | Maximum
FAIR VALUE
FORWARD PRICE RANGE (usd per mwh) | $ / MW	2.79	15.1
CLECO POWER | Measured On A Recurring Basis
FAIR VALUE
ASSETS	$ 8,601	$ 23,355
LIABILITIES	577	468
CLECO POWER | Measured On A Recurring Basis | Level 3
FAIR VALUE
ASSETS	8,601	23,355
LIABILITIES	$ 577	$ 468