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Acquisitions and Divestitures of and Investments in Businesses and Technologies Business Combinations (Details) - USD ($)
$ in Thousands
3 Months Ended
Jan. 01, 2019
Feb. 05, 2018
Apr. 30, 2019
Apr. 30, 2018
Jan. 31, 2018
Business Combination, Description [Abstract]          
Business Combination, Consideration Transferred     $ 0    
Variable Interest Entity Disclosure [Abstract]          
Proceeds from sale or maturity of investments     0 $ 6,556  
Gain from sale of equity method investment     0 (5,785)  
Aerostar [Member]          
Business Combination, Description [Abstract]          
Proceeds from disposal of Aerostar client private business     0 832  
Applied Technology [Member] | SST [Member]          
Variable Interest Entity Disclosure [Abstract]          
Disposal Date   Feb. 05, 2018      
Equity Method Investment, Ownership Percentage         22.00%
Equity Method Investment, Additional Information   SST      
Equity Method Investments         $ 1,937
Proceeds from sale or maturity of investments   $ 6,556      
Applied Technology [Member] | AgSync [Member]          
Business Combination, Description [Abstract]          
Business Acquisition, Effective Date of Acquisition Jan. 01, 2019        
Business Acquisition, Name of Acquired Entity AgSync Inc.        
Business Combination, Consideration Transferred $ 9,700        
Fair Value of Business Acquisition Contingent Consideration - at acquisition     2,052    
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred     300    
Goodwill     4,526    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles     $ 5,700    
Other Nonoperating Income (Expense) [Member] | Applied Technology [Member] | SST [Member]          
Variable Interest Entity Disclosure [Abstract]          
Gain from sale of equity method investment       $ 5,785