Retirement Plans (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2026	Jul. 31, 2025	Jul. 31, 2026	Jul. 31, 2025
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Pension and Other Postretirement Defined Benefit Plans, Including Life Insurance, Liabilities	$ 7,200	$ 6,700	$ 7,200	$ 6,700
Location, Statement of Financial Position, Balance [Axis]: us-gaap:EmployeeRelatedLiabilitiesCurrent
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Pension and Other Postretirement Defined Benefit Plans, Current	6,300	400	6,300	400
Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAccruedLiabilitiesNoncurrent
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Pension and Other Postretirement Defined Benefit Plans, Including Life Insurance, Liabilities, Noncurrent	900	$ 6,300	900	$ 6,300
Location, Statement of Financial Position, Balance [Axis]: us-gaap:PrepaidExpenseAndOtherAssetsCurrent
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Rabbi trust assets in prepaids and other current assets	$ 7,100		$ 7,100
United States
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	1,153,940	1,097,691	1,153,940	1,097,691
Contributions by employer	$ 456	$ 469	$ 911	$ 1,014