Retirement Plans (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2022	Jul. 31, 2021
Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan settlement	$ 0	$ 220	$ 0	$ 220
United States [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Minimum annual contributions per employee, percent			1.00%
Maximum annual contributions per employee, percent			75.00%
Number of common shares held	1,221,095	991,899	1,221,095	991,899
Contributions by employer	$ 322	$ 207	$ 652	$ 391

Amount of (increase) decrease to benefit obligation of defined benefit plan from remeasurement due to settlement. Excludes decrease to benefit obligation for settlement payment.

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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Amount of contribution received by defined benefit plan from employer which increases plan assets.

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Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

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