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RESTRUCTURING AND OTHER RELATED CHARGES (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Restructuring Cost and Reserve [Line Items]    
Restructuring and other related charges, net $ 186 $ 208
OneTEAM Program    
Restructuring Cost and Reserve [Line Items]    
Restructuring and other related charges, net 186 208
Professional fees 1,800 3,200
OneTEAM Program | Severance and related costs    
Restructuring Cost and Reserve [Line Items]    
Restructuring and other related charges, net 186  
Severance charges incurred cumulatively to date 8,600  
IHT | OneTEAM Program | Severance and related costs | Operating segments    
Restructuring Cost and Reserve [Line Items]    
Restructuring and other related charges, net 8 102
MS | OneTEAM Program | Severance and related costs | Operating segments    
Restructuring Cost and Reserve [Line Items]    
Restructuring and other related charges, net 130 85
Corporate and shared support services | OneTEAM Program | Severance and related costs | Operating segments    
Restructuring Cost and Reserve [Line Items]    
Restructuring and other related charges, net $ 48 $ 21