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Composition Of Certain Financial Statement Captions (Schedule Of Amortized Cost And Estimated Fair Value Of Short-Term And Long-Term Available-For-Sale Investments Based On Stated Maturities) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 27, 2013
Sep. 27, 2013
Composition Of Certain Financial Statement Captions [Abstract]    
Amortized Cost, due within 1 year $ 185,232 $ 158,275
Amortized Cost, due in 1 to 2 years 175,577 172,993
Amortized Cost, due in 2 to 3 years 114,745 130,164
Amortized Cost, total 475,554 461,432
Fair Value, due within 1 year 185,306 158,402
Fair Value, due in 1 to 2 years 175,986 173,373
Fair Value, due in 2 to 3 years 114,734 129,965
Fair Value, total $ 476,026 $ 461,740