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Stockholder Rights Plan (Details) (Junior participating cumulative preferred stock rights, USD $)
12 Months Ended
Jan. 03, 2012
factor
right
Junior participating cumulative preferred stock rights
 
Stockholder rights plan  
Number of rights per common share (in rights) 1
Number of shares of junior participating cumulative preferred stock callable by rights 0.01
Rights exercise trigger, minimum percentage of stock acquired or intended to be acquired by an individual or group 15.00%
Rights exercise trigger, minimum percentage of stock acquired or intended to be acquired by a beneficial owner 20.00%
Beneficial ownership interest defined (as a percent) 10.00%
Multiplier of the exercise price that the holder of the rights would receive in value of other than the acquiring company's junior participating cumulative preferred stock 2
Exercise price of junior participating cumulative preferred stock $ 110
Percentage of assets or earning power sold or transferred allowing the rights holder the right to receive common stock of acquiring company 50.00%
Multiplier of the exercise price that the rights holder has right to receive in value of acquiring company's common stock 2