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Retirement Plans - Net Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2021	Jan. 31, 2020
Retirement Benefits [Abstract]
Administrative expenses	$ 69	$ 70
Interest cost	137	160
Expected return on plan assets	(236)	(248)
Prior service cost	11	11
Recognized actuarial loss	185	185
Net periodic benefit cost	$ 166	$ 178

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