ACCRUED EXPENSES (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
ACCRUED EXPENSES [Abstract]
Sales commissions	$ 2,213		$ 2,066
Subcontracting labor	1,308		1,370
Salaries, bonuses and related benefits	15,497		17,587
Warranty accrual	2,417		2,718
Other	7,732		7,808
Accrued expenses	29,167		$ 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	27	91
Adjustments related to pre-existing warranties (including changes in estimates)	(282)	(735)
Less repair costs incurred	(119)	(278)
Currency translation	73	(19)
Ending balance as of end of period	$ 2,417	$ 2,718