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Product Warranty (Tables)
 9 Months Ended
Sep. 30, 2013
Guarantees [Abstract]  
Reconciliation of Reserve for Warranty Expense
The following table provides a reconciliation of the activity related to the Company’s reserve for warranty expense (in thousands):
 
Three Months Ended 
 September 30,
 
Nine Months Ended 
 September 30,
 
2013
 
2012
 
2013
 
2012
Beginning balance
$
8,241

 
$
7,863

 
$
7,539

 
$
8,140

Provision
190

 
2,832

 
4,335

 
6,605

Claims paid/costs incurred
(1,665
)
 
(2,562
)
 
(5,108
)
 
(6,612
)
Ending balance
$
6,766

 
$
8,133

 
$
6,766

 
$
8,133