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RESTRUCTURING CHARGES AND IMPAIRMENT LOSSES (LIABILITY ROLLFORWARD TABLE) (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2018
USD ($)
Restructuring Cost and Reserve [Line Items]  
Beginning balance, restructuring reserve $ 2,103
Expense 4,783
Payments (3,083)
Changes due to foreign currency (181)
Change in estimates (184)
Ending balance, restructuring reserve 3,438
Reduction in Force [Member]  
Restructuring Cost and Reserve [Line Items]  
Beginning balance, restructuring reserve 694
Expense 754
Payments (919)
Changes due to foreign currency (181)
Change in estimates (184)
Ending balance, restructuring reserve 164
Closure of Delivery Centers [Member]  
Restructuring Cost and Reserve [Line Items]  
Beginning balance, restructuring reserve 1,409
Expense 4,029
Payments (2,164)
Ending balance, restructuring reserve $ 3,274