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Warranties
 6 Months Ended
Jun. 30, 2016
Product Warranties Disclosures [Abstract]  
Warranties
Warranties
The overall change in the Company’s warranty reserve is reflected on the condensed consolidated balance sheets in accrued expenses and taxes and is detailed as follows: 
 
Three Months Ended 
 June 30,
 
Six Months Ended 
 June 30,
 
2016
 
2015
 
2016
 
2015
 
(in thousands)
Liability, beginning of period
$
1,713

 
$
1,340

 
$
1,415

 
$
953

Provision for warranties issued during the period, net of adjustments
29

 
286

 
444

 
894

Adjustments to warranties issued during previous periods
(16
)
 
(4
)
 
(11
)
 
(8
)
Warranty claims
(142
)
 
(244
)
 
(264
)
 
(461
)
Liability, end of period
$
1,584

 
$
1,378

 
$
1,584

 
$
1,378