Accumulated Other Comprehensive Income (Loss) (Reclassification from AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Mar. 28, 2020	Mar. 30, 2019	Mar. 28, 2020	Mar. 30, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Prior service cost (credit)	$ (31)	$ (75)	$ (63)	$ (151)
Actuarial losses	7,388	7,627	14,782	15,256
Reclassification from AOCIL into earnings - Retirement liability	7,357	7,552	14,719	15,105
Tax effect - Retirement liability	(1,761)	(1,848)	(3,523)	(3,696)
Net reclassification from AOCIL into earnings - Retirement liability	5,596	5,704	11,196	11,409
Reclassification from AOCIL into earnings - Derivatives	(269)	(149)	(268)	78
Tax effect - Derivatives	63	35	63	(22)
Net reclassification from AOCIL into earnings - Derivatives	(206)	(114)	(205)	56
Foreign Currency Contracts \| Sales
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Derivatives	5	(67)	7	(100)
Foreign Currency Contracts \| Cost Of Sales
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Derivatives	(274)	235	(234)	895
Interest Rate Swaps \| Interest
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Derivatives	$ 0	$ (317)	$ (41)	$ (717)

The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

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