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WARRANTIES
 9 Months Ended
Sep. 30, 2017
Product Warranties Disclosures [Abstract]  
WARRANTIES
WARRANTIES
 
A reconciliation of the changes in the product warranty accrual, which is included in "Accrued expenses" in the Consolidated Balance Sheets, is as follows (in thousands):
 
Three Months Ended 
 September 30,
 
Nine Months Ended 
 September 30,
 
2017
 
2016
 
2017
 
2016
Balance at the beginning of period
$
3,324

 
$
3,824

 
$
3,555

 
$
3,802

Warranties issued
396

 
568

 
1,241

 
1,649

Warranty settlement costs
58

 
(533
)
 
(794
)
 
(1,680
)
Changes in accruals for pre-existing warranties
(324
)
 
(141
)
 
(704
)
 
(77
)
Currency translation adjustments
1

 
14

 
157

 
38

Balance at the end of period
$
3,455

 
$
3,732

 
$
3,455

 
$
3,732