Leases - Lease Income Under Cottonwood Sale Leaseback (Details) - Cleco Cajun - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Lessor, Lease, Description [Line Items]
Fixed payments	$ 10,000	$ 10,000	$ 20,000	$ 16,667
Variable payments	5,194	5,087	10,760	8,239
Amortization of deferred lease liability	2,301	2,396	4,603	3,835
Total lease income	$ 17,495	$ 17,483	$ 35,363	$ 28,741