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Retirement Plans (Narrative) (Details) - USD ($)
3 Months Ended 9 Months Ended
Dec. 31, 2003
Oct. 31, 2018
Oct. 31, 2017
Oct. 31, 2018
Oct. 31, 2017
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax   $ (1,376,000) $ (148,000) $ (27,000) $ (444,000)
United States [Member]          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Maximum annual contributions per employee, percent       75.00%  
Number of common shares held   646,984 556,633 646,984 556,633
Contributions by employer       $ 553,000  
United States [Member] | Minimum [Member]          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Annual contributions per employee, percent       1.00%  
VIP Retirement Plan [Member]          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Rate of compensation increase       50.00%  
Benefit of average compensation years 5 years        
Plan settlement   $ 0 $ 0 $ 0 $ 0
Pension Plan [Member]          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Plan settlement   $ 22,000 $ 0 $ 341,000 $ 0