Retirement Plans (Periodic Pension Cost) (Details) - Pension Plan [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2021	Oct. 31, 2020
Components of Net Cost
Service cost	$ 0	$ 0	$ 0	$ 0
Interest cost	281	301	841	903
Expected return on plan assets	(218)	(224)	(654)	(672)
Plan settlement	65	0	285	0
Amortization of prior service cost	0	0	0	0
Recognized net actuarial loss	442	465	1,328	1,395
Benefit cost	$ 570	$ 542	$ 1,800	$ 1,626