Product Warranties (Tables)

3 Months Ended

Apr. 01, 2012

Product Warranties [Abstract]

Summary Of Warranty Liability Activity

	April 1, 2012			December 31, 2011
Beginning balance	$	4,853		$	2,555
Vocollect addition at acquisition		—			948
Payments or parts usage		(1,425	)		(5,867	)
Additional provision		1,793			7,217
Ending balance	$	5,221		$	4,853