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Product Warranty (Tables)
 6 Months Ended
Jun. 30, 2018
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 June 30,
 
Six Months Ended
June 30,
 
2018
 
2017
 
2018
 
2017
Beginning balance
$
7,311

 
$
5,945

 
$
6,657

 
$
5,395

Provision
3,157

 
2,202

 
5,523

 
4,124

Claims paid/costs incurred
(2,433
)
 
(2,178
)
 
(4,145
)
 
(3,550
)
Ending balance
$
8,035

 
$
5,969

 
$
8,035

 
$
5,969