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Retirement Plans (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Apr. 30, 2022 | Apr. 30, 2021
Pension Plan [Member] |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |
Plan settlement | $ 0 | $ 0
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 | 1,165,985 | 970,632
Contributions by employer | $ 330 | $ 184

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- Definition Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. + References No definition available. + Details
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