ACCRUED EXPENSES (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
ACCRUED EXPENSES [Abstract]
Sales commissions	$ 2,123		$ 2,066
Subcontracting labor	1,186		1,370
Salaries, bonuses and related benefits	12,909		17,587
Warranty accrual	2,540		2,718
Other	8,451		7,808
Accrued expenses	27,209		$ 31,549
Schedule of warranty accrual account for the period from the acquisition date [Roll Forward]
Beginning balance as of beginning of period	2,718	$ 3,659
Charges and costs accrued	0	16
Adjustments related to pre-existing warranties (including changes in estimates)	(158)	(268)
Less repair costs incurred	(50)	(130)
Currency translation	30	28
Ending balance as of end of period	$ 2,540	$ 3,305