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Stockholders' Equity And Stock-Based Compensation (Summary Of Restricted Stock Units Issued To Officers, Directors, And Employees Under 2005 Stock Incentive Plan) (Details) (USD $)
In Thousands, except Per Share data
12 Months Ended
Sep. 30, 2011
Stockholders' Equity And Stock-Based Compensation [Abstract] 
Shares, Non-vested at September 24, 2010823
Shares, Granted484
Shares, Vested(292)
Shares, Forfeitures(69)
Shares, Non-vested at September 30, 2011946
Weighted Average Fair Value, Non-vested at September 24, 2010$ 44.91
Weighted Average Fair Value, Granted$ 61.62
Weighted Average Fair Value, Vested$ 43.46
Weighted Average Fair Value, Forfeitures$ 47.67
Weighted Average Fair Value, Non-vested at September 30, 2011$ 53.71