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ACQUISITIONS (Details Textuals) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jul. 31, 2017 | Jul. 31, 2016 | Jul. 31, 2017 | Jul. 31, 2016
Business Acquisition [Line Items] |  |  |  |
Revenue, Net | $ 391,500 | $ 356,084 | $ 1,103,589 | $ 1,012,959
Pro Forma Revenue | 378,600 |  | 1,076,800 |
FY 2017 Acquisition [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Revenue, Net | $ 23,100 |  | $ 24,600 |
Heico Flight Support Corp [Member] | A2C [Member] |  |  |  |
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% |
Heico Flight Support Corp [Member] | CBD [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Effective Date of Acquisition |  |  | Jun. 30, 2017 |
Name of Acquired Entity |  |  | Carbon by Design |
Description of Acquired Entity |  |  | CBD is a manufacturer of composite components for UAVs, rockets, spacecraft and other specialized applications. |

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