SUBSEQUENT EVENT SUBSEQUENT EVENT (Details Textual) - Subsequent Event [Member] - Electronic Technologies Group [Member]	1 Months Ended
	Nov. 30, 2018
SSP [Member]
Subsequent Event [Line Items]
Subsequent Event, Description	In November 2018, the Company, through HEICO Electronic, acquired all of the stock of Specialty Silicone Products, Inc. ("SSP"). SSP designs and manufactures silicone material for a variety of demanding applications, used in aerospace, defense, research, oil and gas, testing, pharmaceuticals and other markets. The purchase price of this acquisition was paid in cash principally using proceeds from the Company's revolving credit facility and the total consideration for the acquisition is not material or significant to the Company’s consolidated financial statements.
APEX [Member]
Subsequent Event [Line Items]
Subsequent Event, Description	In November 2018, the Company, through HEICO Electronic, acquired 93% of the stock of Apex Micotechnology, Inc. ("Apex"). Apex designs and manufactures precision power analog monolithic, hybrid and open frame components for a certain wide range of aerospace, defense, industrial, measurement, medical and test applications. The purchase price of this acquisition was paid in cash using proceeds from the Company's revolving credit facility and the total consideration for the acquisition is not material or significant to the Company’s consolidated financial statements.