CONSOLIDATED BALANCE SHEETS [PARENTHETICAL] - $ / shares shares in Thousands	Oct. 31, 2021	Oct. 31, 2020
Preferred Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred Stock, shares authorized	10,000	10,000
Preferred Stock, shares issued	0	0
Heico Common Stock [Member]
Common stock, par value (in dollar per share)	$ 0.01	$ 0.01
Common stock, shares authorized	150,000	150,000
Common stock, shares issued	54,264	54,195
Common stock, shares outstanding	54,264	54,195
Common Class A [Member]
Common stock, par value (in dollar per share)	$ 0.01	$ 0.01
Common stock, shares authorized	150,000	150,000
Common stock, shares issued	81,224	80,923
Common stock, shares outstanding	81,224	80,923