QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Oct. 31, 2012	Jul. 31, 2012	Apr. 30, 2012	Jan. 31, 2012	Oct. 31, 2011	Jul. 31, 2011	Apr. 30, 2011	Jan. 31, 2011	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2010
Net sales:
Net sales	$ 242,409	$ 225,969	$ 216,314	$ 212,655	$ 208,919	$ 197,267	$ 184,486	$ 174,219	$ 897,347	$ 764,891	$ 617,020
Gross profit:
Gross profit	89,738	84,252	75,198	78,248	74,319	69,825	66,371	63,926
Net income from consolidated operations:
Net income from consolidated operations	29,313	28,672	24,224	24,466	24,412	26,392	22,126	22,523	106,675	95,453	72,355
Net income attributable to HEICO:
Net income attributable to HEICO	$ 23,791	$ 23,128	$ 19,043	$ 19,185	$ 18,514	$ 20,402	$ 16,830	$ 17,074	$ 85,147	$ 72,820	$ 54,938
Basic:
Basic (in dollars per share)	$ 0.45	$ 0.44	$ 0.36	$ 0.36	$ 0.35	$ 0.39	$ 0.32	$ 0.33	$ 1.62	$ 1.40	$ 1.07
Diluted:
Diluted (in dollars per share)	$ 0.45	$ 0.43	$ 0.36	$ 0.36	$ 0.35	$ 0.38	$ 0.32	$ 0.32	$ 1.60	$ 1.37	$ 1.04