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Retirement Plans - Net Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Retirement Benefits [Abstract]
Administrative expenses	$ 70	$ 47	$ 209	$ 141
Interest cost	160	207	481	621
Expected return on plan assets	(248)	(272)	(743)	(816)
Prior service cost	11	11	33	33
Recognized actuarial loss	184	101	554	302
Net periodic benefit cost	$ 177	$ 94	$ 534	$ 281

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