The percentage of net sales recognized under the percentage of completion revenue recognition method for the period.

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Percent of Net Sales that represent services rendered.

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The amortization method of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar either by their nature or by their use in the operations of a company. The straight-line method is the preferred amortization method, unless another method better reflects the pattern in which the asset is consumed.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 35
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=26713198&loc=d3e15372-109273

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The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

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The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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Description of the methodology for computing depreciation for classes of depreciable assets.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Textuals)	12 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2013
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, Depreciation Methods	Depreciation and amortization is generally provided on the straight-line method over the estimated useful lives of the various assets.
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-Lived Intangible Assets, Amortization Method	The Company’s intangible assets subject to amortization are amortized on the straight-line method (except for certain customer relationships amortized on an accelerated method) over the following estimated useful lives
Revenue Recognition [Abstract]
Percent of Revenue from Services Renderred	10.00%
Net Sales Recognized from Percentage-Of-Completion Method	4.00%	3.00%	1.00%
Heico Aerospace [Member]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Percentage of interest owned by noncontrolling shareholders	20.00%	20.00%
Noncontrolling Interest, Ownership Percentage by Parent		80.00%
Lufthansa Technik AG [Member] \| Heico Aerospace [Member]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Percentage of interest owned by noncontrolling shareholders	20.00%
Heico Flight Support Corp [Member] \| Subsidiary One [Member]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Noncontrolling Interest, Ownership Percentage by Parent	80.00%
Heico Flight Support Corp [Member] \| Subsidiary Two [Member]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Noncontrolling Interest, Ownership Percentage by Parent	84.00%
Heico Flight Support Corp [Member] \| Subsidiaries [Member]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Noncontrolling Interest, Ownership Percentage by Parent	80.10%
HEICO Electronic [Member] \| Subsidiary One [Member]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Noncontrolling Interest, Ownership Percentage by Parent	80.10%
HEICO Electronic [Member] \| Subsidiary Two [Member]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Noncontrolling Interest, Ownership Percentage by Parent	80.10%
HEICO Electronic [Member] \| Subsidiary Three [Member]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Noncontrolling Interest, Ownership Percentage by Parent	82.50%
HEICO Electronic [Member] \| Subsidiary Four [Member]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Noncontrolling Interest, Ownership Percentage by Parent	95.90%
HEICO Electronic [Member] \| Subsidiary Five [Member]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Noncontrolling Interest, Ownership Percentage by Parent	78.00%
Heico Aerospace [Member] \| Subsidiary One [Member]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Noncontrolling Interest, Ownership Percentage by Parent	80.10%
Heico Aerospace [Member] \| Subsidiary Two [Member]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Noncontrolling Interest, Ownership Percentage by Parent	82.30%
Heico Aerospace [Member] \| Joint Venture [Member]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Noncontrolling Interest, Ownership Percentage by Parent	84.00%