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RESTRUCTURING CHARGES AND IMPAIRMENT LOSSES (LIABILITY CLASSIFICATION TABLE) (DETAILS) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Restructuring Cost and Reserve [Line Items]        
Reduction in force $ 2,989 $ 622 $ 3,006 $ 1,629
Facility exit charges 699   885  
Restructuring charges, net 3,688 622 3,890 1,629
Customer Management Services        
Restructuring Cost and Reserve [Line Items]        
Reduction in force 2,485 516 2,482 1,331
Facility exit charges 699   852  
Customer Growth Services        
Restructuring Cost and Reserve [Line Items]        
Reduction in force 108   108  
Customer Technology Services        
Restructuring Cost and Reserve [Line Items]        
Reduction in force 314 13 324 13
Facility exit charges     33  
Customer Strategy Services        
Restructuring Cost and Reserve [Line Items]        
Reduction in force $ 82 $ 93 $ 92 $ 285