Product Warranty Liabilities (Tables)

9 Months Ended

Sep. 30, 2012

Product Warranty Liabilities

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

	2011			2012
Reserve at January 1	$	24,924		$	27,400
Additions		27,414			19,656
Payments		(22,545	)		(15,430	)
Reserve at September 30	$	29,793		$	31,626