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RESTRUCTURING CHARGES AND IMPAIRMENT LOSSES (LIABILITY ROLLFORWARD TABLE) (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2019
USD ($)
Restructuring Cost and Reserve [Line Items]  
Beginning balance, restructuring reserve $ 3,642
Expense 1,576
Payments (1,918)
Changes due to foreign currency (39)
Change in estimates (4)
Ending balance, restructuring reserve 340
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 864
Payments (1,130)
Changes due to foreign currency (51)
Change in estimates (4)
Ending balance, restructuring reserve 95
Closure of Delivery Centers [Member]  
Restructuring Cost and Reserve [Line Items]  
Beginning balance, restructuring reserve 3,226
Expense 712
Payments (788)
Changes due to foreign currency 12
Ending balance, restructuring reserve 245
Closure of Delivery Centers [Member] | ASU 2016-02  
Restructuring Cost and Reserve [Line Items]  
Reclassifications due to ASU 842 implementation $ (2,917)