Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 30, 2018	Mar. 31, 2017	Mar. 30, 2018	Mar. 31, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, Beginning Of Period	$ (8,122)	$ (19,679)	$ (7,753)	$ (10,197)
Income Tax Effect - Benefit/(Expense)	(851)	(698)	1,038	(669)
Net Of Tax	2,688	4,977	2,303	(4,544)
Realized (Gains) - Investment Securities	(227)	(12)	(207)	34
Income Tax Effect - (Benefit)/Expense	45	6	(41)	1
Net Of Tax	(182)	(6)	(166)	(33)
Other Comprehensive Income (Loss), After Reclassifications, Net of Tax	2,506	4,971	2,137	(4,511)
Balance, End Of Period	(5,616)	(14,708)	(5,616)	(14,708)
Unrealized Gains/Losses On Available-For-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, Beginning Of Period	(1,970)	(1,277)		742
Unrealized Gains (Losses)	(1,393)	686	(3,089)	(1,474)
Income Tax Effect - Benefit/(Expense)		(99)		(3)
Net Of Tax		587		(1,471)
Realized (Gains) - Investment Securities		(12)		34
Income Tax Effect - (Benefit)/Expense		6		1
Net Of Tax		(6)		(33)
Other Comprehensive Income (Loss), After Reclassifications, Net of Tax		581		(1,438)
Balance, End Of Period		(696)		(696)
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, Beginning Of Period	(6,152)	(18,402)		(10,939)
Unrealized Gains (Losses)	$ 4,932	4,989	$ 6,430	(3,739)
Income Tax Effect - Benefit/(Expense)		(599)		(666)
Net Of Tax		4,390		(3,073)
Net Of Tax				(3,073)
Other Comprehensive Income (Loss), After Reclassifications, Net of Tax		4,390
Balance, End Of Period		$ (14,012)		$ (14,012)