NET INCOME PER SHARE ATTRIBUTABLE TO HEICO SHAREHOLDERS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2023
Numerator:
Net income attributable to HEICO	$ 690,385	$ 514,109	$ 403,596
Denominator:
Weighted average common shares outstanding - basic	139,048	138,455	137,185
Effect of dilutive stock options	1,723	1,743	1,720
Weighted Average Number of Shares Outstanding, Diluted	140,771	140,198	138,905
Earnings Per Share, Basic	$ 4.97	$ 3.71	$ 2.94
Earnings Per Share, Diluted	$ 4.90	$ 3.67	$ 2.91
Anti-dilutive stock options excluded	545	707	1,281