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RESTRUCTURING CHARGES AND IMPAIRMENT LOSSES (LIABILITY ROLLFORWARD TABLE) (Details)
$ in Thousands
6 Months Ended
Jun. 30, 2019
USD ($)
Restructuring Cost and Reserve [Line Items]  
Beginning balance, restructuring reserve $ 3,642
Expense 1,393
Payments (1,587)
Change in estimates (4)
Ending balance, restructuring reserve 527
ASU 2016-02  
Restructuring Cost and Reserve [Line Items]  
Reclassifications due to ASU 842 implementation (2,917)
Reduction in Force [Member]  
Restructuring Cost and Reserve [Line Items]  
Beginning balance, restructuring reserve 416
Expense 774
Payments (1,020)
Changes due to foreign currency (16)
Change in estimates (4)
Ending balance, restructuring reserve 150
Closure of Delivery Centers [Member]  
Restructuring Cost and Reserve [Line Items]  
Beginning balance, restructuring reserve 3,226
Expense 619
Payments (567)
Changes due to foreign currency 16
Ending balance, restructuring reserve 377
Closure of Delivery Centers [Member] | ASU 2016-02  
Restructuring Cost and Reserve [Line Items]  
Reclassifications due to ASU 842 implementation $ (2,917)