NET INCOME PER SHARE ATTRIBUTABLE TO HEICO SHAREHOLDERS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Oct. 31, 2022	Oct. 31, 2021	Oct. 31, 2020
Numerator:
Net income attributable to HEICO	$ 351,675	$ 304,220	$ 313,984
Denominator:
Weighted average common shares outstanding - basic	136,010	135,326	134,754
Effect of dilutive stock options	2,027	2,528	2,548
Weighted Average Number of Shares Outstanding, Diluted	138,037	137,854	137,302
Earnings Per Share, Basic	$ 2.59	$ 2.25	$ 2.33
Earnings Per Share, Diluted	$ 2.55	$ 2.21	$ 2.29
Anti-dilutive stock options excluded	749	185	258