Annual report pursuant to Section 13 and 15(d)

Summary Of Significant Accounting Policies (Narrative) (Details)

v2.4.0.6
Summary Of Significant Accounting Policies (Narrative) (Details) (USD $)
 12 Months Ended
Dec. 29, 2012
Dec. 31, 2011
Jan. 01, 2011
Summary Of Significant Accounting Policies [Line Items]      
Fair value of term deposits $ 1,610,000 $ 0  
Restricted cash 3,208,000 3,166,000  
Amount of individual claims before reimbursement 125,000    
Minimum percentage of projected aggregate claims before insurance reimbursement 100.00%    
Self insurance program expense 4,518,000 4,274,000 3,391,000
Proceeds from equity awards exercised 309,000 39,000 12,005,000
Tax impact of cancelled vested equity awards 2,201,000 (317,000) (152,000)
Amount available to repurchase under the stock repurchase plan 31,707,000    
Repurchase of common stock 68,294,000 33,459,000 17,031,000
Product return percentage of net sales 0.80% 1.10% 1.10%
Advertising expense 3,942,000 3,893,000 1,202,000
Research and development expense 4,664,000 4,071,000 3,842,000
Retail And Preferred Customers [Member]
      
Summary Of Significant Accounting Policies [Line Items]      
Duration of product return 30 days    
Percentage of sale refunded 100.00%    
Associates [Member]
      
Summary Of Significant Accounting Policies [Line Items]      
Duration of product return 30 days    
Amount of returned product which could result in cancellation of distributorship $ 100    
Other Unused And Resalable [Member]
      
Summary Of Significant Accounting Policies [Line Items]      
Duration of product return 1 year    
Percentage of sale refunded 100.00%    
Restocking fee 10.00%