Product Warranty Liabilities (Tables)

6 Months Ended

Jun. 30, 2015

Guarantees [Abstract]

Summary of Activity in Product Warranty Liabilities

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:

	2014			2015
Reserve at January 1	$	30,853		$	14,005
Additions		9,772			4,824
Payments		(9,358	)		(6,089	)
Reserve at June 30	$	31,267		$	12,740