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Retirement Plans - Net Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020
Retirement Benefits [Abstract]
Administrative expenses	$ 70	$ 70	$ 208	$ 209
Interest cost	137	160	412	481
Expected return on plan assets	(236)	(248)	(708)	(743)
Prior service cost	11	11	33	33
Recognized actuarial loss	185	184	553	554
Net periodic benefit cost	$ 167	$ 177	$ 498	$ 534

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