NET INCOME PER SHARE ATTRIBUTABLE TO HEICO SHAREHOLDERS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2022	Jul. 31, 2021
Numerator:
Net income attributable to HEICO	$ 82,540	$ 76,889	$ 254,471	$ 218,158
Denominator:
Weighted Average Number of Shares Outstanding, Basic	135,978	135,370	135,835	135,291
Effect of dilutive stock options	1,859	2,587	2,055	2,546
Weighted Average Number of Shares Outstanding, Diluted	137,837	137,957	137,890	137,837
Earnings Per Share, Basic	$ 0.61	$ 0.57	$ 1.87	$ 1.61
Earnings Per Share, Diluted	$ 0.60	$ 0.56	$ 1.85	$ 1.58
Anti-dilutive stock options excluded	767	0	748	13