XML 78 R67.htm IDEA: XBRL DOCUMENT v3.10.0.1
Acquisitions, Dispositions, and Deconsolidations - Construction Segment (Details) - USD ($)
$ in Thousands
Nov. 01, 2017
Sep. 30, 2018
Dec. 31, 2017
Business Acquisition [Line Items]      
Goodwill   $ 127,051 $ 131,741
DBMG      
Business Acquisition [Line Items]      
Goodwill     2,290
Acquisition costs     3,300
DBMG | Assembled and Trained Workforce      
Business Acquisition [Line Items]      
Goodwill     $ 1,500
DBMG | Candraft      
Business Acquisition [Line Items]      
Percentage of ownership interest acquired 100.00%    
DBMG | Candraft and MSS      
Business Acquisition [Line Items]      
Consideration paid $ 17,800    
Cash paid in acquisition $ 16,100