ACQUISITIONS	6 Months Ended
Apr. 30, 2018
Business Combinations [Abstract]
Acquisitions [Text Block]	ACQUISITIONS In April 2018, the Company, through a subsidiary of HEICO Electronic, acquired all of the assets and business of the Emergency Locator Transmitter Beacon product line ("ELT Product Line") of Instrumar Limited. The ELT Product Line designs and manufactures Emergency Locator Transmitter Beacons for the commercial aviation and defense markets, that upon activation, transmit a distress signal to alert search and rescue operations of the aircraft's location. The purchase price of this acquisition was paid using cash provided by operating activities. In February 2018, the Company, through a subsidiary of HEICO Electronic, acquired 85% of the assets and business of Sensor Technology Engineering, Inc. ("Sensor Technology"). Sensor Technology designs and manufactures sophisticated nuclear radiation detectors for law enforcement, homeland security and military applications. The remaining 15% continues to be owned by certain members of Sensory Technology's management team. The purchase price of this acquisition was paid in cash, principally using proceeds from the Company's revolving credit facility. In November 2017, the Company, through a subsidiary of HEICO Electronic, acquired all of the stock of Interface Displays & Controls, Inc. ("IDC"). IDC designs and manufactures electronic products for aviation, marine, military fighting vehicles, and embedded computing markets. The purchase price of this acquisition was paid using cash provided by operating activities. The total consideration for the fiscal 2018 acquisitions is not material or significant to the Company’s condensed consolidated financial statements and the related allocation to the tangible and identifiable intangible assets acquired and liabilities and noncontrolling interests assumed is preliminary until the Company obtains final information regarding their fair values. The operating results of the fiscal 2018 acquisitions were included in the Company’s results of operations from each of the effective acquisition dates. The amount of net sales and earnings of the fiscal 2018 acquisitions included in the Condensed Consolidated Statement of Operations for the six and three months ended April 30, 2018 is not material. Had the fiscal 2018 acquisitions been consummated as of November 1, 2016, net sales, net income from consolidated operations, net income attributable to HEICO, and basic and diluted net income per share attributable to HEICO shareholders on a pro forma basis for the six and three months ended April 30, 2018 and 2017 would not have been materially different than the reported amounts.

ACQUISITIONS

In April 2018, the Company, through a subsidiary of HEICO Electronic, acquired all of the assets and business of the Emergency Locator Transmitter Beacon product line ("ELT Product Line") of Instrumar Limited. The ELT Product Line designs and manufactures Emergency Locator Transmitter Beacons for the commercial aviation and defense markets, that upon activation, transmit a distress signal to alert search and rescue operations of the aircraft's location. The purchase price of this acquisition was paid using cash provided by operating activities.

In February 2018, the Company, through a subsidiary of HEICO Electronic, acquired 85% of the assets and business of Sensor Technology Engineering, Inc. ("Sensor Technology"). Sensor Technology designs and manufactures sophisticated nuclear radiation detectors for law enforcement, homeland security and military applications. The remaining 15% continues to be owned by certain members of Sensory Technology's management team. The purchase price of this acquisition was paid in cash, principally using proceeds from the Company's revolving credit facility.

In November 2017, the Company, through a subsidiary of HEICO Electronic, acquired all of the stock of Interface Displays & Controls, Inc. ("IDC"). IDC designs and manufactures electronic products for aviation, marine, military fighting vehicles, and embedded computing markets. The purchase price of this acquisition was paid using cash provided by operating activities.

The total consideration for the fiscal 2018 acquisitions is not material or significant to the Company’s condensed consolidated financial statements and the related allocation to the tangible and identifiable intangible assets acquired and liabilities and noncontrolling interests assumed is preliminary until the Company obtains final information regarding their fair values. The operating results of the fiscal 2018 acquisitions were included in the Company’s results of operations from each of the effective acquisition dates. The amount of net sales and earnings of the fiscal 2018 acquisitions included in the Condensed Consolidated Statement of Operations for the six and three months ended April 30, 2018 is not material. Had the fiscal 2018 acquisitions been consummated as of November 1, 2016, net sales, net income from consolidated operations, net income attributable to HEICO, and basic and diluted net income per share attributable to HEICO shareholders on a pro forma basis for the six and three months ended April 30, 2018 and 2017 would not have been materially different than the reported amounts.