NET INCOME PER SHARE ATTRIBUTABLE TO HEICO SHAREHOLDERS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Jan. 31, 2019	Jan. 31, 2018
Numerator:
Net income attributable to HEICO	$ 79,332	$ 65,152
Denominator:
Weighted Average Number of Shares Outstanding, Basic	132,933	132,048
Effect of dilutive stock options	4,045	4,342
Weighted Average Number of Shares Outstanding, Diluted	136,978	136,390
Earnings Per Share, Basic	$ 0.60	$ 0.49
Earnings Per Share, Diluted	$ 0.58	$ 0.48
Anti-dilutive stock options excluded	760	770