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Income Taxes (Schedule Of Unrecognized Income Tax Benefits) (Details) (USD $)
In Thousands
12 Months Ended
Sep. 24, 2011
Sep. 25, 2010
Income Taxes [Abstract]  
Balance at beginning of fiscal year$ 31,790$ 28,073
Additions2,0142,364
Reductions, related to the current year  
Additions related to change in estimate5,9343,682
Reductions, related to prior years(700)(675)
Payments(1,182)(193)
Lapses in statutes of limitations and settlements(9,162)(1,461)
Additions related to reserves acquired from acquisitions565 
Balance as of the end of the fiscal year$ 29,259$ 31,790