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Warranties (Tables)
9 Months Ended
Oct. 02, 2011
Product Warranties Disclosures [Abstract] 
Liability for warranty expense
Liability for warranty expense is included in Other current accrued liabilities and Non-current liabilities in the accompanying Condensed Consolidated Balance Sheets and the activity for the three and nine months ended October 2, 2011 and October 3, 2010 was as follows:
 
Three months ended
 
Nine months ended
 
October 2,
2011
 
October 3,
2010
 
October 2,
2011
 
October 3,
2010
 
(In thousands)
Balance, beginning of period
$
23,156

 
$
26,305

 
$
24,702

 
$
25,909

Additions
5,689

 
2,973

 
13,893

 
25,978

Usage
(5,310
)
 
(5,075
)
 
(15,060
)
 
(27,684
)
Balance, end of period
$
23,535

 
$
24,203

 
$
23,535

 
$
24,203