Retirement Plans (Periodic Pension Cost) (Details) - Pension Plan [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2019	Oct. 31, 2018
Components of Net Cost
Service cost	$ 0	$ 0	$ 0	$ 0
Interest cost	355	370	1,065	1,080
Expected return on plan assets	(343)	(348)	(1,029)	(1,162)
Plan settlement	0	22	0	341
Amortization of prior service cost	0	0	0	0
Recognized net actuarial loss	176	252	528	597
Benefit cost	$ 188	$ 296	$ 564	$ 856