Retirement Plans (Pension Plans, Narrative) (Details) - USD ($)	12 Months Ended
Jan. 31, 2022	Jan. 31, 2021
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Liability for Future Policy Benefits, Life	$ 8,762,000	$ 8,845,000
Contribution amount, Qualified plan and VIP plan	654,000	604,000
Estimated contributions to qualified pension plans for 2023	615,000
Accumulated other comprehensive loss, pension plans	6,000,000
Combined Employee Retirement Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Company contributions	$ 690,000	$ 640,000
Discount rate	3.20%
Combined Employee Retirement Plans [Member] \| Minimum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Percentage of trust assets managed	40.00%
Discount rate		2.75%
Combined Employee Retirement Plans [Member] \| Maximum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Percentage of trust assets managed	50.00%
Discount rate		2.80%
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	$ 3,457,000	$ 3,430,000
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	13.00%	15.00%
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)	11.00%

Amount, after tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan.

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Weighted average rate of compensation increase used to determine net periodic benefit cost of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan.

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Amount of contribution received by defined benefit plan from employer which increases plan assets.

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Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

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Amount of discretionary contributions made by an employer to a defined contribution plan.

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Amount of accrued obligation to policyholders that relates to insured events under long-term life insurance contracts.

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Benefit of average compensation years.

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Defined Benefit Plan, Cash Surrender Amount

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Defined Benefit Plan, Percentage of Assets managed by Investment Advisors

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Defined Benefit Plan, Percentage of Assets Held in Trust

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