Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands		12 Months Ended
		Sep. 30, 2016		Sep. 25, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, Beginning Of Period		$ (11,462)		$ 3,014
Income Tax Effect - Benefit/(Expense)		774		777
Net of tax		841		(14,118)
Realized (Gains) - Investment Securities	[1]	563		446
Income Tax Effect - Expense	[2]	(139)		(88)
Net Of Tax		424		(358)
Net current-period other comprehensive income/(loss)		1,265		(14,476)
Balance, End Of Period		(10,197)		(11,462)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, Beginning Of Period		350		505
Other Comprehensive Income (Loss), before Reclassifications, before Tax		(220)		(290)
Income Tax Effect - Benefit/(Expense)		188		(87)
Net of tax		(32)		203
Realized (Gains) - Investment Securities		563	[1]	446
Income Tax Effect - Expense		(139)	[2]	(88)
Net Of Tax		424		(358)
Net current-period other comprehensive income/(loss)		392		(155)
Balance, End Of Period		742		350
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, Beginning Of Period		(11,812)		2,509
Other Comprehensive Income (Loss), before Reclassifications, before Tax	[1]	(287)		(15,185)
Income Tax Effect - Benefit/(Expense)		586		864
Net of tax		873		(14,321)
Net current-period other comprehensive income/(loss)		873		(14,321)
Balance, End Of Period		$ (10,939)		$ (11,812)

[1] Realized gains or losses from the sale of our AFS investment securities or from foreign currency translation adjustments are included within other income/expense, net in our consolidated statements of operations

[2] The income tax benefit or expense is included within provision for income taxes in our consolidated statements of operations.