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, 2023	Apr. 30, 2022	Apr. 30, 2023	Apr. 30, 2022
Numerator:
Net income attributable to HEICO	$ 105,120	$ 85,010	$ 198,147	$ 171,931
Denominator:
Weighted Average Number of Shares Outstanding, Basic	136,916	135,891	136,786	135,763
Effect of dilutive stock options	1,684	1,976	1,804	2,153
Weighted Average Number of Shares Outstanding, Diluted	138,600	137,867	138,590	137,916
Earnings Per Share, Basic	$ 0.77	$ 0.63	$ 1.45	$ 1.27
Earnings Per Share, Diluted	$ 0.76	$ 0.62	$ 1.43	$ 1.25
Anti-dilutive stock options excluded	1,340	749	1,045	739