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ACQUISITIONS - Narrative (Details) - USD ($)
$ in Thousands
1 Months Ended
Jan. 26, 2018
Jul. 31, 2017
Apr. 30, 2016
Jun. 30, 2018
Dec. 30, 2017
Acquisitions          
Goodwill       $ 321,362 $ 337,720
Torrent Engineering and Equipment          
Acquisitions          
Percentage acquired 60.00%        
Consideration transfered $ 4,800        
Annual revenue of acquiree 9,000        
Goodwill 3,922        
Customer relationships and other intangible assets $ 4,020        
IGC Galvanizing Industries (M) Sdn Bhd          
Acquisitions          
Percentage acquired     10.00%    
Consideration transfered     $ 5,510    
Aircon          
Acquisitions          
Consideration transfered   $ 5,362      
Annual revenue of acquiree   10,000      
Goodwill   $ 3,327      
Customer relationships and other intangible assets       $ 2,109