Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Apr. 12, 2016	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net tax expense (benefit) of gain (loss) on postretirement benefits	$ (26)	$ (1,442)
Net tax expense on cash flow hedges	0	0
Successor
Net tax expense (benefit) of gain (loss) on postretirement benefits				$ (1,442)	$ (1,359)
Net tax expense on cash flow hedges				$ 0	0
Predecessor
Net tax expense (benefit) of gain (loss) on postretirement benefits			$ 367
Net tax expense on cash flow hedges			$ 37
Cleco Power [Member]
Net tax expense (benefit) of gain (loss) on postretirement benefits	104	1,364			(38)	$ 1,602
Net tax expense on cash flow hedges	$ 33	$ 33			$ 99	$ 99