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Business and Summary of Significant Accounting Policies Warranty Liabilities (Details) (USD $)
12 Months Ended
Dec. 29, 2012
Dec. 31, 2011
Jan. 01, 2011
Warranty Liabilities [Abstract]      
Standard Product Warranty Description P20Y    
Customer participation term 18 years    
Movement in Standard Product Warranty Accrual [Roll Forward]      
Balance at beginning of year $ 6,310,000 $ 5,744,000 $ 7,143,000
Additions charged to costs and expenses for current-year sales 4,114,000 4,232,000 3,630,000
Deductions from reserves (5,094,000) (4,750,000) (4,318,000)
Changes in liability for pre-existing warranties during the current year, including expirations(1) (472,000) 1,084,000 [1] (711,000)
Balance at end of period 4,858,000 6,310,000 5,744,000
Adjustment for customer-service reserves   $ 1,600,000  
[1] Includes $1.6 million increase for customer-service reserves during 2011.