Guarantees (Tables)

9 Months Ended

Sep. 27, 2014

Commitments and Contingencies Disclosure [Abstract]

Changes in Accrued Warranty

Changes in accrued warranty were as follows (in thousands):

	Three Months Ended						Nine Months Ended
	September 27,			September 28,			September 27,			September 28,
	2014			2013			2014			2013
Balance at beginning of period	$	4,582		$	5,719		$	5,155		$	4,602
Warranty expense accruals		1,633			690			3,960			2,857
Warranty payments		(1,252	)		(1,401	)		(4,152	)		(4,284	)
Warranty liability assumed		—			—			—			1,833
Balance at end of period	$	4,963		$	5,008		$	4,963		$	5,008