NET INCOME PER SHARE ATTRIBUTABLE TO HEICO SHAREHOLDERS (Details) (USD $)	3 Months Ended								12 Months Ended
	Oct. 31, 2011	Jul. 31, 2011	Apr. 30, 2011	Jan. 31, 2011	Oct. 31, 2010	Jul. 31, 2010	Apr. 30, 2010	Jan. 31, 2010	Oct. 31, 2011	Oct. 31, 2010	Oct. 31, 2009
Numerator:
Net income attributable to HEICO	$ 18,514,000	$ 20,402,000	$ 16,830,000	$ 17,074,000	$ 15,642,000	$ 14,930,000	$ 12,573,000	$ 11,793,000	$ 72,820,000	$ 54,938,000	$ 44,626,000
Less: redemption amount of redeemable noncontrolling interests in excess of fair value (see Note 12)									19,000	102,000	0
Net income attributable to HEICO, as adjusted									$ 72,839,000	$ 54,836,000	$ 44,626,000
Denominator:
Weighted average common shares outstanding - basic (in shares)									41,632,074	41,040,635	40,944,999
Effect of dilutive stock options (in shares)									869,178	1,172,903	1,280,050
Weighted average common shares outstanding - diluted (in shares)									42,501,252	42,213,538	42,225,049
Net income per share attributable to HEICO shareholders (Note 13):
Basic (in dollars per share)	$ 0.44	$ 0.49	$ 0.40	$ 0.41	$ 0.38	$ 0.36	$ 0.31	$ 0.29	$ 1.75	$ 1.34	$ 1.09
Diluted (in dollars per share)	$ 0.44	$ 0.48	$ 0.40	$ 0.40	$ 0.37	$ 0.35	$ 0.30	$ 0.28	$ 1.71	$ 1.30	$ 1.06
Anti-dilutive stock options excluded (in shares)									384,844	519,531	134,830