v3.26.1
Retirement Plans (Narrative) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Apr. 30, 2026
Apr. 30, 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
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
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
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 $ 6,700  
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 1,112,598 1,063,340
Contributions by employer $ 455 $ 545