SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands		12 Months Ended
		Sep. 24, 2016	Sep. 26, 2015	Sep. 27, 2014
Allowance for Doubtful Accounts [Member]
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		$ 3,520	$ 11,122	$ 6,786
Charged (credited) to Costs and Expenses		1,146	(397)	11,933
Other Additions		0	0	0
Deductions	[1]	(2,225)	(7,205)	(7,597)
Balance at End of Period		2,441	3,520	11,122
Valuation Allowance of Deferred Tax Assets [Member]
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		54,045	51,864	46,406
Charged (credited) to Costs and Expenses		4,737	2,181	5,458
Other Additions		0	0	0
Deductions	[1]	0	0	0
Balance at End of Period		$ 58,782	$ 54,045	$ 51,864

[1] Represents amounts that did not impact earnings.