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Stockholder's Equity (Details 3) (Restricted Stock [Member], USD $)
12 Months Ended
Dec. 30, 2012
Jan. 01, 2012
Jan. 02, 2011
Jan. 03, 2010
Restricted Stock [Member]
       
Shares        
Beginning Balance, Shares 117,432 109,002   101,340
Granted 37,304 43,654 41,885  
Issued (32,610) (27,913) (31,307)  
Forfeited/Canceled (357) (7,311) (2,916)  
Ending Balance, Shares 121,769 117,432 109,002 101,340
Weighted average fair value per shares        
Weighted average fair value per share, Beginning Balance $ 32.82 $ 32.22   $ 31.77
Weighted average fair value per share, Granted $ 44.34 $ 37.22 $ 29.62  
Weighted average fair value per share, Issued $ 30.97 $ 37.89 $ 27.71  
Weighted average fair value per share, Forfeited/Canceled $ 30.97 $ 30.77 $ 27.71  
Weighted average fair value per share, Ending Balance $ 36.85 $ 32.82 $ 32.22 $ 31.77