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, 2025	Jul. 31, 2024	Jul. 31, 2025	Jul. 31, 2024
Numerator:
Net income attributable to HEICO	$ 177,341	$ 136,577	$ 502,089	$ 374,421
Denominator:
Weighted Average Number of Shares Outstanding, Basic	139,135	138,516	138,993	138,389
Effect of dilutive stock options	1,815	1,789	1,685	1,697
Weighted Average Number of Shares Outstanding, Diluted	140,950	140,305	140,678	140,086
Earnings Per Share, Basic	$ 1.27	$ 0.99	$ 3.61	$ 2.71
Earnings Per Share, Diluted	$ 1.26	$ 0.97	$ 3.57	$ 2.67
Anti-dilutive stock options excluded	726	345	506	925