Retirement Plans (Periodic Pension Cost) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income
Amortization of loss	$ 1,831	$ 776
Total recognized in other Comprehensive Income	(726)	5,269
Items not yet Recognized as a Component of Net Periodic Pension Expense, Included in AOCI
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), after Tax	13,600
Combined Employee Retirement Plans [Member]
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income
Net loss	849	7,885
Prior service cost	0	0
Amortization of loss	(1,831)	(776)
Amortization of prior service cost (credit)	0	0
Amortization of initial asset	0	0
Total recognized in other Comprehensive Income	(982)	7,109
Items not yet Recognized as a Component of Net Periodic Pension Expense, Included in AOCI
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), after Tax	0	0
Net actuarial loss	1,771	1,872
Net periodic pension cost	1,771	1,872
Projected benefit obligation	44,178	43,292	$ 36,299
Accumulated benefit obligation	44,178	43,292
Fair value of plan assets	23,972	23,654	$ 23,527
Components of Net Cost
Service cost	0	0
Interest cost	1,211	1,382
Expected return on plan assets	(869)	(1,432)
Amortization of transition amount	0	0
Recognized (gain) loss due to settlement	0	0
Amortization of prior service cost	0	0
Recognized net actuarial loss	1,831	776
Benefit cost	2,173	$ 726
Estimated Future Benefit Payments
FYE 01-31-2022	6,724
FYE 01-31-2023	3,122
FYE 01-31-2024	2,791
FYE 01-31-2025	3,169
FYE 01-31-2026	2,647
FYE 01-31-2027 to 2031	11,917
Total	$ 30,370
Weighted Average Assumptions to Determine Net Periodic Pension Cost
Discount rate		4.10%
Expected return on plan assets	6.00%	6.50%
Minimum [Member] | Combined Employee Retirement Plans [Member]
Weighted Average Assumptions to Determine Benefit Obligations at Year-End
Discount rate	2.75%	3.00%
Weighted Average Assumptions to Determine Net Periodic Pension Cost
Discount rate	3.00%
Maximum [Member] | Combined Employee Retirement Plans [Member]
Weighted Average Assumptions to Determine Benefit Obligations at Year-End
Discount rate	2.80%	3.05%
Weighted Average Assumptions to Determine Net Periodic Pension Cost
Discount rate	3.05%