NET INCOME PER SHARE ATTRIBUTABLE TO HEICO SHAREHOLDERS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2022	Apr. 30, 2021
Numerator:
Net income attributable to HEICO	$ 85,010	$ 70,673	$ 171,931	$ 141,269
Denominator:
Weighted Average Number of Shares Outstanding, Basic	135,891	135,294	135,763	135,252
Effect of dilutive stock options	1,976	2,520	2,153	2,526
Weighted Average Number of Shares Outstanding, Diluted	137,867	137,814	137,916	137,778
Earnings Per Share, Basic	$ 0.63	$ 0.52	$ 1.27	$ 1.04
Earnings Per Share, Diluted	$ 0.62	$ 0.51	$ 1.25	$ 1.03
Anti-dilutive stock options excluded	749	11	739	20