Guarantees (Tables)

3 Months Ended

Mar. 30, 2013

Commitments And Contingencies Disclosure [Abstract]

Changes in Accrued Warranty

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

	Three Months Ended
	March 30, 2013			March 31, 2012
Balance at beginning of period	$	4,692		$	6,801
Warranty expense accruals		240			1,665
Warranty payments		(1,409	)		(1,739	)
Warranty liability assumed from Ismeca acquisition		1,817			—
Balance at end of period	$	5,340		$	6,727