NET INCOME PER SHARE ATTRIBUTABLE TO HEICO SHAREHOLDERS (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Jan. 31, 2012	Jan. 31, 2011
Numerator:
Net income attributable to HEICO	$ 19,185	$ 17,074
Denominator:
Weighted average common shares outstanding - basic (in shares)	42,089	41,360
Effect of dilutive stock options (in shares)	539	1,025
Weighted average common shares outstanding - diluted (in shares)	42,628	42,385
Net income per share attributable to HEICO shareholders:
Basic (in dollars per share)	$ 0.46	$ 0.41
Diluted (in dollars per share)	$ 0.45	$ 0.40
Anti-dilutive stock options excluded (in shares)	509	270