Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, Beginning Of Period	$ (14,683)	$ (5,616)	$ (15,832)	$ (7,753)
Unrealized Gains (Losses)	2,234		5,044
Income Tax Effect - Benefit/(Expense)	(60)	1,230	(39)	192
Net Of Tax	47	(7,958)	1,202	(5,628)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	309	(7,555)	1,499	(5,252)
Realized (Gains) - Investment Securities	(152)	(162)	(218)	(369)
Income Tax Effect - (Benefit)/Expense	30	32	55	73
Net Of Tax	(122)	(130)	(163)	(296)
Net current-period other comprehensive income/(loss)	187	(7,685)	1,336	(5,548)
Balance, End Of Period	(14,496)	(13,301)	(14,496)	(13,301)
Unrealized Gains/Losses On Available-For-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, Beginning Of Period	(80)	(3,529)	(2,948)	(377)
Unrealized Gains (Losses)	2,095	490	4,905	(2,599)
Income Tax Effect - Benefit/(Expense)	60	(21)	(39)	82
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	2,035	469	4,944	(2,517)
Realized (Gains) - Investment Securities	(147)	(162)	(213)	(369)
Income Tax Effect - (Benefit)/Expense	30	32	55	73
Net Of Tax	(117)	(130)	(158)	(296)
Net current-period other comprehensive income/(loss)	1,918	339	4,786	(2,813)
Balance, End Of Period	1,838	(3,190)	1,838	(3,190)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, Beginning Of Period	0		0
Unrealized Gains (Losses)	139		139
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	139		139
Realized (Gains) - Investment Securities	(5)		(5)
Net Of Tax	(5)		(5)
Net current-period other comprehensive income/(loss)	134		134
Balance, End Of Period	134		134
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, Beginning Of Period	(14,603)	(2,087)	(12,884)	(7,376)
Unrealized Gains (Losses)	(1,865)	(9,275)	(3,584)	(2,845)
Income Tax Effect - Benefit/(Expense)	0	1,251	0	110
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(1,865)	(8,024)	(3,584)	(2,735)
Net Of Tax			(3,584)	(2,735)
Net current-period other comprehensive income/(loss)	(1,865)	(8,024)
Balance, End Of Period	$ (16,468)	$ (10,111)	$ (16,468)	$ (10,111)