Litigation, Other Commitments and Contingencies, and Disclosures about Guarantees - Minimum Capital Lease Payments (Details) - CLECO POWER $ in Thousands	Jun. 30, 2018 USD ($)
Loss Contingencies [Line Items]
Six months ending Dec. 31, 2018	$ 1,306
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	38,015
Less: executory costs	6,021
Net minimum lease payments	31,994
Less: amount representing interest	15,318
Present value of net minimum lease payments	16,676
Current liabilities	529
Non-current liabilities	$ 16,147