Warranties (Tables)

9 Months Ended

Sep. 28, 2013

Product Warranties Disclosures [Abstract]

Components of the warranty accrual

Components of the warranty accrual, which were included in the accompanying condensed consolidated balance sheets with other current liabilities, were as follows (in thousands):

	Three Months Ended						Nine Months Ended
	September 28, 2013			September 29, 2012			September 28, 2013			September 29, 2012
Balance as of beginning of period	$	3,519		$	4,943		$	4,203		$	4,797
Accruals for warranties issued during period	801			881			1,924			3,545
Aggregate changes in liabilities related to preexisting warranties	360			206			962			1,364
Settlements during the period	(1,278		)	(1,381		)	(3,687		)	(5,057		)
Balance as of end of period	$	3,402		$	4,649		$	3,402		$	4,649