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ACQUISITIONS (Details Textuals) - Heico Flight Support Corp [Member] - A2C [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016
Business Acquisition [Line Items]
Effective Date of Acquisition			Apr. 24, 2017
Name of Acquired Entity			Air Cost Control
Percentage of Voting Interests Acquired	80.10%		80.10%
Description of Acquired Entity			A2C is a leading aviation electrical interconnect product distributor of items such as connectors, wire, cable, protection and fastening systems, in addition to distributing a wide range of electromechanical parts.
Ownership Percentage by Noncontrolling Owners	19.90%		19.90%
Pro Forma Revenue	$ 389.1	$ 372.5	$ 753.2	$ 696.2

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