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ACQUISITIONS (Details Textuals)
€ in Thousands, $ in Thousands
3 Months Ended
Jan. 31, 2023
USD ($)
Jan. 31, 2022
USD ($)
Jan. 31, 2023
EUR (€)
Business Acquisition [Line Items]      
Revenues $ 620,915 $ 490,343  
Exxelia [Member]      
Business Acquisition [Line Items]      
Preferred Stock, Dividend Rate, Percentage 5.18%    
Revenues $ 15,000    
Exxelia [Member] | Customer Relationships [Member]      
Business Acquisition [Line Items]      
Finite-Lived Intangible Asset, Useful Life 18 years    
Exxelia [Member] | Intellectual Property [Member]      
Business Acquisition [Line Items]      
Finite-Lived Intangible Asset, Useful Life 16 years    
Exxelia [Member] | Exxelia [Member]      
Business Acquisition [Line Items]      
Related Party Transaction, Terms and Manner of Settlement HEICO issued Exxelia a ten-year €150 million note, which accrues interest at 4.7% per annum on the principal outstanding.    
Related Party Transaction, Rate 4.70%    
Exxelia [Member] | Euro Member Countries, Euro | Exxelia [Member]      
Business Acquisition [Line Items]      
Notes Receivable, Related Parties, Noncurrent | €     € 150,000
Exxelia [Member] | Heico Electronic Technologies Corp      
Business Acquisition [Line Items]      
Business Acquisition, Percentage of Voting Interests Acquired 93.69%   93.69%
Name of Acquired Entity Exxelia International SAS    
Description of Acquired Entity Exxelia designs, manufactures and sells high reliability (“Hi-Rel”), complex, passive electronic components and rotary joint assemblies for mostly aerospace and defense applications, in addition to other high-end applications, such as medical and energy uses, including emerging “clean energy” and electrification applications.    
Business Acquisition, Transaction Costs $ 5,100    
Exxelia [Member] | Heico Electronic Technologies Corp | Existing Management      
Business Acquisition [Line Items]      
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners 6.31%   6.31%
Alcon [Member] | Heico Electronic Technologies Corp      
Business Acquisition [Line Items]      
Business Acquisition, Percentage of Voting Interests Acquired 90.00%   90.00%
Name of Acquired Entity Alcon Electronics Pvt. Ltd.    
Alcon [Member] | Heico Electronic Technologies Corp | Existing Management      
Business Acquisition [Line Items]      
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners 10.00%   10.00%