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Product Warranties (Tables)
 9 Months Ended
Sep. 30, 2012
Product Warranties Disclosures [Abstract]  
Schedule of Product Warranty Liability
Changes in the Company's product warranty liability in the three and nine months ended September 30, 2012 and 2011 were as follows (in thousands):
 
 
Three months ended September 30,
 
Nine months ended September 30,
 
2012
 
2011
 
2012
 
2011
Balance, Beginning of period
$
2,153

 
$
3,358

 
$
2,017

 
$
3,935

Accruals
370

 
606

 
1,645

 
1,625

Adjustments
—

 
(370
)
 
(171
)
 
(730
)
Payments
(460
)
 
(1,422
)
 
(1,428
)
 
(2,658
)
Balance, September 30
$
2,063

 
$
2,172

 
$
2,063

 
$
2,172