Other Comprehensive Income (Details) - Reclassification out of Accumulated Other Comprehensive Income - Accumulated Defined Benefit Plans Adjustment - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 30, 2018	Mar. 31, 2017	Mar. 30, 2018	Mar. 31, 2017
Amortization of Defined Benefit Items:
Actuarial losses	$ (2,660)	$ (3,530)	$ (5,181)	$ (7,086)
Prior service cost	66	78	134	155
Total Before Income Tax	(2,594)	(3,452)	(5,047)	(6,931)
Income Tax Benefit	418	799	1,022	1,602
Total reclassifications, after-tax	$ (2,176)	$ (2,653)	$ (4,025)	$ (5,329)