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, 2025	Apr. 30, 2024	Apr. 30, 2025	Apr. 30, 2024
Numerator:
Net income attributable to HEICO	$ 156,793	$ 123,146	$ 324,748	$ 237,844
Denominator:
Weighted Average Number of Shares Outstanding, Basic	139,005	138,386	138,921	138,325
Effect of dilutive stock options	1,594	1,673	1,620	1,651
Weighted Average Number of Shares Outstanding, Diluted	140,599	140,059	140,541	139,976
Earnings Per Share, Basic	$ 1.13	$ 0.89	$ 2.34	$ 1.72
Earnings Per Share, Diluted	$ 1.12	$ 0.88	$ 2.31	$ 1.70
Anti-dilutive stock options excluded	740	1,009	397	1,215