Retirement Plans (Pension Plans, Narrative) (Details) - USD ($)	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Liability for Future Policy Benefits, Life	$ 8,845,000	$ 8,919,000
Contribution amount, Qualified plan and VIP plan	604,000	954,000
Estimated contributions to qualified pension plans for 2022	428,000
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), after Tax	13,600,000
Estimated Impact Of One Percent Change in Investment Return	210,000
Estimated Impact of One Percent Change on Obligations under the Plan	6,700,000
Estimated Impact Of One Percent Change in Discount Rate	$ 800,000
Combined Employee Retirement Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Percentage of trust assets managed	49.00%
Company contributions	$ 640,000	990,000
Accumulated other compensation loss	14,444,000	15,427,000
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), after Tax	$ 0	$ 0
Combined Employee Retirement Plans [Member] | Minimum [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate	2.75%	3.00%
Combined Employee Retirement Plans [Member] | Maximum [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate	2.80%	3.05%
VIP Retirement Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Benefit of average compensation	50.00%
Benefit of average compensation period	5 years
Cash surrender value	$ 3,430,000	$ 3,384,000
Debt Securities [Member] | Combined Employee Retirement Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Short-term investment funds	15.00%	16.00%
Fixed Income Securities [Member] | Combined Employee Retirement Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Percentage of assets held in trust (less than)	12.00%