Retirement Plans (Narrative) (Details) - United States [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2023	Jul. 31, 2022	Jul. 31, 2023	Jul. 31, 2022
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	1,415,111	1,221,095	1,415,111	1,221,095
Contributions by employer	$ 319	$ 322	$ 722	$ 652