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WARRANTIES (Tables)
 12 Months Ended
Dec. 31, 2017
Product Warranties Disclosures [Abstract]  
Schedule of reconciliation of changes in product warranty accrual included in accrued expenses
A reconciliation of the changes in the product warranty accrual, which is included in accrued expenses, is as follows (in thousands):
 
December 31,
 
2017
 
2016
Balance at beginning of year
$
3,556

 
$
3,802

Warranties issued
2,035

 
2,116

Warranty settlement costs
(1,949
)
 
(2,330
)
Changes in accruals for pre-existing warranties
(449
)
 
70

Currency translation adjustments
162

 
(102
)
Balance at end of year
$
3,355

 
$
3,556