Guarantees (Tables)

6 Months Ended

Jul. 01, 2011

Guarantees [Abstract]

Summary of warranty accrual included in accrued liabilities

	Three months ended						Six months ended
	July 1, 2011			July 2, 2010			July 1, 2011			July 2, 2010
				(In thousands)
Balance at beginning of period	$	5,263		$	3,426		$	4,811		$	4,186
Accrual for current period warranties		2,171			1,020			4,433			1,470
Warranty costs incurred		(1,856	)		(1,252	)		(3,666	)		(2,462	)
Balance at end of period	$	5,578		$	3,194		$	5,578		$	3,194