v2.3.0.15
Income Taxes (Aggregate Changes In Balance Of Gross Unrecognized Tax Benefits, Excluding Interest And Penalties) (Details) (USD $)
In Thousands
12 Months Ended
Sep. 30, 2011
Sep. 24, 2010
Apr. 01, 2011
Income Taxes [Abstract]   
Unrecognized Tax Benefits, Beginning Balance$ 16,558$ 16,916$ 300
Lapse of statute of limitations(1,097)(2,143) 
Decreases in balances related to tax positions taken during prior years(8,083)  
Increases in balances related to tax positions taken during prior years1,006520 
Increases in balances related to tax positions taken during the current year2991,265 
Unrecognized Tax Benefits, Ending Balance$ 8,683$ 16,558$ 300