Composition Of Certain Financial Statement Captions (Schedule Of Other Non-Current Liabilities) (Details) - USD ($) $ in Thousands	Sep. 28, 2018	Sep. 29, 2017
Composition Of Certain Financial Statement Captions [Abstract]
Supplemental retirement plan obligations	$ 3,388	$ 2,928
Non-current tax liabilities	129,253	91,013
Other liabilities	18,319	13,573
Other non-current liabilities	$ 150,960	$ 107,514