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Acquisitions and Divestitures of and Investments in Businesses and Technologies Acquisition-related Contingent Consideration (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 31, 2019
Oct. 31, 2018
Oct. 31, 2019
Oct. 31, 2018
Oct. 31, 2019
Oct. 31, 2018
Acquisition-related contingent consideration [Roll Forward]            
Acquisition-related contingent consideration, Beginning Balance $ 3,579 $ 2,950 $ 4,172 $ 3,046    
Fair Value Contingent Consideration Acquisition of a Business 0 0 310 0    
Change in fair value of acquisition-related contingent consideration 100 182 343 585    
Contingent consideration earn-out paid (723) (721) (1,869) (1,220)    
Acquisition-related contingent consideration, Ending Balance 2,956 2,411 2,956 2,411    
Acquisition-related contingent consideration liability, current         $ 813 $ 1,764
Acquisition-related contingent consideration liability, Noncurrent         2,143 647
Business Combination, Contingent Consideration, Liability $ 3,579 $ 2,950 $ 4,172 $ 3,046 2,956 $ 2,411
Applied Technology [Member] | AgSync [Member]            
Business Combination, Contingent Consideration Arrangements [Abstract]            
Contingent Consideration Term in Years     3 years      
Contingent consideration, potential cash payment         3,500  
Business acquisition contingent consideration cumulative paid     $ 0      
Applied Technology [Member] | Raven Europe [Member]            
Business Combination, Contingent Consideration Arrangements [Abstract]            
Contingent Consideration Term in Years     10 years      
Contingent consideration, potential cash payment         2,500  
Business acquisition contingent consideration cumulative paid     $ 2,146      
Aerostar [Member] | ATS [Member]            
Business Combination, Contingent Consideration Arrangements [Abstract]            
Contingent Consideration Term in Years     7 years      
Contingent obligation remaining         0  
Engineered Films [Member] | CLI [Member]            
Business Combination, Contingent Consideration Arrangements [Abstract]            
Contingent Consideration Term in Years     3 years      
Contingent consideration, potential cash payment         $ 2,000  
Business acquisition contingent consideration cumulative paid     $ 1,333