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Business and Summary of Significant Accounting Policies Warranty Liabilities (Tables)
 12 Months Ended
Dec. 29, 2012
Warranty Liabilities [Abstract]  
Schedule of Product Warranty Liability [Table Text Block]
We classify as non-current those estimated warranty costs expected to be paid out in greater than one year. The activity in the accrued warranty liabilities account was as follows (in thousands): 
 
2012
 
2011
 
2010
Balance at beginning of period
$
6,310

 
$
5,744

 
$
7,143

Additions charged to costs and expenses for current-year sales
4,114

 
4,232

 
3,630

Deductions from reserves
(5,094
)
 
(4,750
)
 
(4,318
)
Changes in liability for pre-existing warranties during the current year, including expirations(1)
(472
)
 
1,084

 
(711
)
Balance at end of period
$
4,858

 
$
6,310

 
$
5,744

        
(1) 
Includes $1.6 million increase for customer-service reserves during 2011.