Litigation, Other Commitments and Contingencies, and Disclosures about Guarantees - Minimum Capital Lease Payments (Details) - CLECO POWER $ in Thousands	Sep. 30, 2018 USD ($)
Loss Contingencies [Line Items]
Three months ending Dec. 31, 2018	$ 653
Years ending Dec. 31,
2019	2,611
2020	2,611
2021	2,611
2022	2,611
2023	2,611
Thereafter	23,654
Total minimum lease payments	37,362
Less: executory costs	5,919
Net minimum lease payments	31,443
Less: amount representing interest	14,894
Present value of net minimum lease payments	16,549
Current liabilities	543
Non-current liabilities	$ 16,006