ACQUISITIONS (Details Textuals) $ in Thousands	9 Months Ended
	Jul. 31, 2025 USD ($) shares
SVM | Heico Electronic Technologies Corp
Business Combination [Line Items]
Business Combination, Voting Equity Interest Acquired, Percentage	70.00%
Business Combination, Name of Acquiree	SVM Private Limited
Business Combination, Description of Acquiree	SVM designs and manufactures high-performance electronic passive components and subsystems, including critical magnetic components and busbars, that serve the healthcare and industrial end-markets.
SVM | Heico Electronic Technologies Corp | Existing Management
Business Combination [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	30.00%
Millennium | HFSC
Business Combination [Line Items]
Business Combination, Voting Equity Interest Acquired, Percentage	90.00%
Business Combination, Name of Acquiree	Millennium International, LLC
Business Combination, Description of Acquiree	Millennium is an FAA and EASA-certified Part 145 Repair Station, specializing in the repair and support of new generation and legacy avionics systems and components. Millennium offers comprehensive repair, overhaul, retrofit, and exchange services to its customers that include aircraft OEMs, fleet operators, repair businesses, and avionics brokers.
Business Combination, Contingent Consideration, Range of Outcomes, Maximum, Amount | $	$ 11,500
Stock Issued During Period, Shares, Acquisitions | shares	53,186
Millennium | HFSC | Existing Management
Business Combination [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	10.00%
Rosen | Heico Electronic Technologies Corp
Business Combination [Line Items]
Business Combination, Voting Equity Interest Acquired, Percentage	100.00%
Business Combination, Name of Acquiree	Rosen Aviation, LLC
Business Combination, Description of Acquiree	Rosen designs and manufactures in-flight entertainment products, principally in-cabin displays and control panels, for the business and aviation markets.
Gables | Heico Electronic Technologies Corp
Business Combination [Line Items]
Business Combination, Voting Equity Interest Acquired, Percentage	100.00%
Business Combination, Name of Acquiree	Gables Engineering, Inc.
Business Combination, Description of Acquiree	Gables designs and manufactures advanced solutions for aerospace platforms, including cockpit displays and other avionics components such as navigation, audio, surveillance, and communication panels for a wide range of aircraft.