XML 50 R38.htm IDEA: XBRL DOCUMENT v3.6.0.2
Business Combination (Details) - USD ($)
$ in Thousands
 3 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Business Acquisition [Line Items]    
Contingent Consideration Fair Value $ 1,100 $ 1,100
Business Acquisitions    
Business Acquisition [Line Items]    
Total Consideration Transferred $ 59,592  
Business Acquisition Technibus [Member] | Infrastructure Solutions [Member]    
Business Acquisition [Line Items]    
Name of Acquired Business Technibus, Inc. (“Technibus”)  
Description of Acquired Business a Canton, Ohio based provider of custom engineered, metal enclosed bus duct solutions  
Date of Acquisition Agreement Jun. 15, 2016  
Business Acquisition STR [Member] | Commercial & Industrial [Member]    
Business Acquisition [Line Items]    
Name of Acquired Business STR Mechanical, LLC (“STR”)  
Description of Acquired Business a Charlotte, North Carolina-based provider of commercial and industrial mechanical services  
Date of Acquisition Agreement Apr. 27, 2016  
Business Acquisition Calumet [Member] | Infrastructure Solutions [Member]    
Business Acquisition [Line Items]    
Name of Acquired Business Calumet Armature & Electric, LLC (“Calumet”)  
Description of Acquired Business an Illinois-based provider of design, manufacturing, assembly, and repair services of electric motors for the industrial and mass transit markets  
Date of Acquisition Agreement Oct. 30, 2015  
Contingent Consideration Fair Value $ 1,100  
Business Acquisition Shanahan [Member] | Commercial & Industrial [Member]    
Business Acquisition [Line Items]    
Name of Acquired Business Shanahan Mechanical and Electrical, Inc. (“Shanahan”)  
Description of Acquired Business a Nebraska-based provider of mechanical and electrical contracting services  
Date of Acquisition Agreement Nov. 20, 2015