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Common Stock (Tables)
 12 Months Ended
Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Fair Value Assumptions of Non-Vested Stock
The fair value of shares of non-vested stock granted during 2015 under the LTIP was estimated on the date of grant and the expense was calculated using the Monte Carlo simulation model with the assumptions listed in the following table:
 
PREDECESSOR

 
FOR THE
YEAR ENDED
DEC. 31, 2015

Expected term (in years) (1)
3.0

Volatility of Cleco stock (2)
15.8
%
Correlation between Cleco stock volatility and peer group
63.1
%
Expected dividend yield
2.9
%
Weighted average fair value (Monte Carlo model)
$
45.60

(1) The expected term was based on the service period of the award.
(2) The volatility rate is based on historical stock prices over an appropriate period, generally equal to the expected term.