Retirement Plans (Narrative) (Details) - United States [Member] - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2024	Apr. 30, 2023
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	1,240,365	1,320,482
Contributions by employer	$ 441	$ 403