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Warranties
 6 Months Ended
Jun. 30, 2014
Commitments and Contingencies Disclosure [Abstract]  
Warranties
Warranties
The overall change in the Company’s warranty reserve is reflected on the condensed consolidated balance sheet in accrued expenses and taxes and is detailed as follows: 
 
Three Months Ended 
 June 30,
 
Six Months Ended 
 June 30,
 
2014
 
2013
 
2014
 
2013
 
(in thousands)
Liability, beginning of period
$
1,498

 
$
1,220

 
$
1,385

 
$
1,374

Provision for warranties issued during the year, net of
     adjustments
307

 
567

 
596

 
877

Adjustments to warranties issued during previous
     years
14

 
(43
)
 
(23
)
 
(396
)
Warranty claims
(165
)
 
(225
)
 
(304
)
 
(336
)
Liability, end of period
$
1,654

 
$
1,519

 
$
1,654

 
$
1,519