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, unless otherwise specified	3 Months Ended
	Dec. 28, 2012
Share-based Compensation [Abstract]
Shares, Non-vested at September 28, 2012	2,572
Shares, Granted	951
Shares, Vested	(296)
Shares, Forfeitures and cancellations	(47)
Shares, Non-vested at December 28, 2012	3,180
Weighted Average Fair Value, Non-vested at September 28, 2012	$ 37.98
Weighted Average Fair Value, Granted	$ 30.57
Weighted Average Fair Value, Vested	$ 39.20
Weighted Average Fair Value, Forfeitures and cancellations	$ 38.65
Weighted Average Fair Value, Non-vested at December 28, 2012	$ 35.64