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FAIR VALUE MEASUREMENTS (Details Textuals)
$ in Thousands, € in Millions
9 Months Ended 12 Months Ended
Jul. 31, 2019
USD ($)
Jul. 31, 2019
EUR (€)
Oct. 31, 2019
USD ($)
Oct. 31, 2017
USD ($)
Oct. 31, 2018
USD ($)
Oct. 31, 2018
EUR (€)
Business Acquisition, Contingent Consideration [Line Items]            
Deferred Compensation Plan Assets     $ 151,891   $ 132,737  
Payment of contingent consideration     2,630 $ 1,100    
Contingent consideration, liability     18,326   20,875  
Flight Support Group [Member] | FY2019 Acquisition [Member]            
Business Acquisition, Contingent Consideration [Line Items]            
Amount of contingent purchase consideration, the company could be required to pay     6,400      
Contingent consideration, liability     1,100      
Flight Support Group [Member] | FY 2015 Acquisition [Member]            
Business Acquisition, Contingent Consideration [Line Items]            
Payment of contingent consideration $ 6,800          
Contingent Consideration, Liability, Current         5,800  
Electronic Technologies Group [Member] | FY 2017 Acquisition [Member]            
Business Acquisition, Contingent Consideration [Line Items]            
Amount of contingent purchase consideration, the company could be required to pay     20,000      
Contingent consideration, liability     16,700   13,900  
Electronic Technologies Group [Member] | FY 2016 Acquisition [Member]            
Business Acquisition, Contingent Consideration [Line Items]            
Amount of contingent purchase consideration, the company could be required to pay     1,100      
Payment of contingent consideration     300      
Contingent consideration, liability     $ 500      
Euro Member Countries, Euro | Flight Support Group [Member] | FY 2015 Acquisition [Member]            
Business Acquisition, Contingent Consideration [Line Items]            
Payment of contingent consideration | €   € 6.1        
Contingent Consideration, Liability, Current | €           € 5.1
Closed Plan [Member]            
Business Acquisition, Contingent Consideration [Line Items]            
Deferred Compensation Plan Assets         5,900  
Closed Plan [Member]            
Business Acquisition, Contingent Consideration [Line Items]            
Deferred Compensation Liability, Classified, Noncurrent         $ 5,900