Annual report pursuant to Section 13 and 15(d)

Backlog (Unaudited) (Details Textual)

v3.7.0.1
Backlog (Unaudited) (Details Textual) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Construction [Member]    
Estimated Revenue From Uncompleted Contract $ 390.2  
Construction [Member] | Predecessor [Member]    
Estimated Revenue From Uncompleted Contract   $ 355.4
Service [Member]    
Estimated Revenue From Uncompleted Contract $ 44.1  
Service [Member] | Predecessor [Member]    
Estimated Revenue From Uncompleted Contract   $ 22.7