Product Warranty Liabilities (Tables)

9 Months Ended

Sep. 30, 2014

Guarantees [Abstract]

Summary of Activity in Product Warranty Liabilities

The following table summarizes the activity in the Company’s product warranty liabilities:

	2013			2014
Reserve at January 1	$	30,139		$	30,853
Additions		15,032			13,983
Payments		(13,350	)		(14,886	)
Reserve at September 30	$	31,821		$	29,950