NET INCOME PER SHARE ATTRIBUTABLE TO HEICO SHAREHOLDERS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Jan. 31, 2022	Jan. 31, 2021
Numerator:
Net income attributable to HEICO	$ 86,921	$ 70,596
Denominator:
Weighted Average Number of Shares Outstanding, Basic	135,635	135,210
Effect of dilutive stock options	2,331	2,532
Weighted Average Number of Shares Outstanding, Diluted	137,966	137,742
Earnings Per Share, Basic	$ 0.64	$ 0.52
Earnings Per Share, Diluted	$ 0.63	$ 0.51
Anti-dilutive stock options excluded	728	28