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GOODWILL AND OTHER INTANGIBLE ASSETS - Intangible Assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]    
Gross Intangible Assets $ 349,884 $ 367,026
Accumulated Amortization (139,556) (129,996)
Net Intangible Assets $ 210,328 $ 237,030
Tradenames and trademarks    
Finite-Lived Intangible Assets [Line Items]    
Weighted Average Amortization Period 20 years 20 years
Gross Intangible Assets $ 53,103 $ 57,894
Accumulated Amortization (15,307) (14,034)
Net Intangible Assets $ 37,796 $ 43,860
Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Weighted Average Amortization Period 13 years 10 years
Gross Intangible Assets $ 282,736 $ 290,415
Accumulated Amortization (116,222) (105,567)
Net Intangible Assets $ 166,514 $ 184,848
Technology    
Finite-Lived Intangible Assets [Line Items]    
Weighted Average Amortization Period 12 years 12 years
Gross Intangible Assets $ 14,045 $ 16,517
Accumulated Amortization (8,027) (8,694)
Net Intangible Assets $ 6,018 $ 7,823
Backlog    
Finite-Lived Intangible Assets [Line Items]    
Weighted Average Amortization Period   1 year
Gross Intangible Assets   $ 2,200
Accumulated Amortization   (1,701)
Net Intangible Assets   $ 499