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Warranties
 9 Months Ended
Sep. 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 
 September 30,
 
Nine Months Ended 
 September 30,
 
2014
 
2013
 
2014
 
2013
 
(in thousands)
Liability, beginning of period
$
1,654

 
$
1,519

 
$
1,385

 
$
1,374

Provision for warranties issued during the year, net of
     adjustments
335

 
226

 
931

 
1,103

Adjustments to warranties issued during previous
     years
(97
)
 
(314
)
 
(120
)
 
(710
)
Warranty claims
(248
)
 
(144
)
 
(552
)
 
(480
)
Liability, end of period
$
1,644

 
$
1,287

 
$
1,644

 
$
1,287