Operating Segments and Geographic Data (Schedule Of Long-Lived Assets, Net Of Accumulated Depreciation, By Geographic Region) (Details) - USD ($) $ in Thousands	Sep. 25, 2015	Sep. 26, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Total long-lived tangible assets, net of accumulated depreciation	$ 403,091	$ 289,755
U.S. [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	374,203	257,064
International [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 28,888	$ 32,691