Composition Of Certain Financial Statement Captions (Schedule Of Other Non-Current Liabilities) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Sep. 25, 2015
Composition Of Certain Financial Statement Captions [Abstract]
Supplemental retirement plan obligations	$ 2,540	$ 2,400
Non-current tax liabilities	68,254	62,843
Other liabilities	12,128	11,781
Other non-current liabilities	$ 82,922	$ 77,024