Retirement Plans (Periodic Pension Cost) (Details) - Pension Plan [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2022	Oct. 31, 2021	Oct. 31, 2022	Oct. 31, 2021
Components of Net Cost
Service cost	$ 0	$ 0	$ 0	$ 0
Interest cost	298	281	895	841
Expected return on plan assets	(237)	(218)	(711)	(654)
Plan settlement	64	65	64	285
Amortization of prior service cost	0	0	0	0
Recognized net actuarial loss	134	442	402	1,328
Benefit cost	$ 259	$ 570	$ 650	$ 1,800