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Product Warranty Liabilities
 6 Months Ended
Jun. 30, 2017
Guarantees [Abstract]  
Product Warranty Liabilities
Product Warranty Liabilities
The Company provides for the estimated cost of product warranties at the time revenue is recognized based primarily on historical return rates, estimates of the eligible tire population and the value of tires to be replaced. The following table summarizes the activity in the Company’s product warranty liabilities:
 
2017
 
2016
Reserve at beginning of year
$
10,634

 
$
12,339

Additions
4,483

 
4,792

Payments
(4,403
)
 
(5,121
)
Reserve at June 30
$
10,714

 
$
12,010