Income Taxes (Aggregate Changes In Balance Of Gross Unrecognized Tax Benefits, Excluding Interest And Penalties) (Details) (USD $)	12 Months Ended
	Sep. 26, 2014	Sep. 27, 2013	Sep. 28, 2012
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Unrecognized tax benefits if recognized, would affect our effective tax rate	$ 21,400,000
Unrecognized Tax Benefits, Expected Reduction as a Result of Settlement	700,000
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefits, Beginning Balance	32,468,000	16,880,000	8,683,000
Increases in balances related to tax positions taken during prior years	3,249,000	16,865,000	3,156,000
Decreases in balances related to tax positions taken during prior years	0	0	(493,000)
Increases in balances related to tax positions taken during the current year	0	2,639,000	6,770,000
Lapse of statute of limitations	(4,366,000)	(3,064,000)	(1,236,000)
Settlements	0	(852,000)	0
Unrecognized Tax Benefits, Ending Balance	$ 31,351,000	$ 32,468,000	$ 16,880,000