RESTRUCTURING CHARGES AND IMPAIRMENT LOSSES (LIABLITY ROLLFORWARD TABLE) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($)
Restructuring Cost and Reserve [Line Items]
Beginning balance, restructuring reserve	$ 2,103
Expense	849
Payments	(649)
Changes due to foreign currency	(29)
Ending balance, restructuring reserve	2,274
Reduction in Force [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance, restructuring reserve	694
Expense	204
Payments	(326)
Changes due to foreign currency	(29)
Ending balance, restructuring reserve	543
Closure of Delivery Centers [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance, restructuring reserve	1,409
Expense	645
Payments	(323)
Ending balance, restructuring reserve	$ 1,731