Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands		12 Months Ended
		Sep. 28, 2018	Sep. 29, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, Beginning Of Period		$ (7,753)	$ (10,197)
Income Tax Effect - Benefit/(Expense)		106	(609)
Net of tax		(7,721)	2,513
Realized (Gains) - Investment Securities	[1]	(447)	95
Income Tax Effect - Expense	[2]	89	(26)
Net Of Tax		(358)	(69)
Net current-period other comprehensive income/(loss)		(8,079)	2,444
Balance, End Of Period		(15,832)	(7,753)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, Beginning Of Period		(377)	742
Other Comprehensive Income (Loss), before Reclassifications, before Tax		(2,213)	(1,062)
Income Tax Effect - Benefit/(Expense)		0	12
Net of tax		(2,213)	(1,050)
Realized (Gains) - Investment Securities		(447)	(95)
Income Tax Effect - Expense		89	26
Net Of Tax		(358)	(69)
Net current-period other comprehensive income/(loss)		(2,571)	(1,119)
Balance, End Of Period		(2,948)	(377)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, Beginning Of Period		(7,376)	(10,939)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	[1]	(5,614)	4,184
Income Tax Effect - Benefit/(Expense)		(106)	(621)
Net of tax		(5,508)	3,563
Net current-period other comprehensive income/(loss)		(5,508)	3,563
Balance, End Of Period		$ (12,884)	$ (7,376)

[1] Realized gains or losses, if any, 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.