NET INCOME PER SHARE ATTRIBUTABLE TO HEICO SHAREHOLDERS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2021
Numerator:
Net income attributable to HEICO	$ 403,596	$ 351,675	$ 304,220
Denominator:
Weighted average common shares outstanding - basic	137,185	136,010	135,326
Effect of dilutive stock options	1,720	2,027	2,528
Weighted Average Number of Shares Outstanding, Diluted	138,905	138,037	137,854
Earnings Per Share, Basic	$ 2.94	$ 2.59	$ 2.25
Earnings Per Share, Diluted	$ 2.91	$ 2.55	$ 2.21
Anti-dilutive stock options excluded	1,281	749	185