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Stock Based Compensation (Restricted Stock Awards) (Details) (Restricted Stock Awards [Member], USD $)
In Thousands, except Per Share data
5 Months Ended
Jul. 16, 2011
Jul. 17, 2010
Jul. 18, 2009
Restricted Stock Awards [Member]
     
Shares granted 324 268 306
Approximate vesting date 2/10/2013 2/9/2012 2/9/2011
Fair value per share $ 15.93 $ 17.59 $ 16.64