Retirement Plans (Periodic Pension Cost) (Details) - Pension Plan [Member] - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2024	Apr. 30, 2023
Components of Net Cost
Service cost	$ 0	$ 0
Interest cost	311	360
Expected return on plan assets	(169)	(199)
Plan settlement	0	0
Amortization of prior service cost	(35)	0
Recognized net actuarial loss	0	0
Benefit cost	$ 107	$ 161