Quarterly report pursuant to Section 13 or 15(d)

Backlog (Details Textual)

v3.10.0.1
Backlog (Details Textual) - USD ($)
$ in Millions
Jun. 30, 2018
Dec. 31, 2017
Construction [Member]    
Estimated Revenue From Uncompleted Contract $ 445.3  
Construction [Member] | Predecessor [Member]    
Estimated Revenue From Uncompleted Contract   $ 426.7
Service [Member]    
Estimated Revenue From Uncompleted Contract $ 47.2  
Service [Member] | Predecessor [Member]    
Estimated Revenue From Uncompleted Contract   $ 34.7