Product Warranties (Tables)

9 Months Ended

Sep. 30, 2012

Summary Of Warranty Liability Activity

The following table summarizes our warranty liability activity included in current liabilities, for the nine-month period ended September 30, 2012 and the year ended December 31, 2011, respectively (in thousands):

	September 30, 2012			December 31, 2011
Beginning balance	$	4,853		$	2,555
Vocollect addition at acquisition	—			948
Payments or parts usage	(4,404		)	(5,867		)
Additional provision	4,511			7,217
Ending balance	$	4,960		$	4,853