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Income Taxes (Significant Differences Between Statutory Federal Tax Rate And Effective Income Tax Rate) (Details)
12 Months Ended
Sep. 28, 2012
Sep. 30, 2011
Oct. 01, 2010
Income Taxes [Abstract]      
Statutory U.S. federal income tax rate 35.00% 35.00% 35.00%
Foreign rate differential (1.00%) (0.90%) (3.60%)
State income tax, net of federal benefit 3.10% 4.20% 5.30%
Increase (Decrease) in valuation reserve for deferred assets 7.10% (211.00%) (8.10%)
Other 4.90% 6.20% 0.30%
Effective income tax rate 49.10% (166.50%) 28.90%