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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Textuals) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Oct. 31, 2024 | Oct. 31, 2023
Property, Plant and Equipment [Abstract] |  |
Property, Plant and Equipment, Depreciation Method [Extensible Enumeration] | Depreciation Method, Straight-Line [Member] |
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 customer relationships, which are amortized on an accelerated method) over the following estimated useful lives |
Acquisition Costs |  | $ 25,400
Business Combination, Acquisition Related Costs |  | 21,600
Interest Expense, Operating and Nonoperating |  | $ 3,800
Lufthansa Technik Ag [Member] | HEICO Aerospace [Member] |  |
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Percentage of interest owned by noncontrolling shareholders | 20.00% |
HFSC | Subsidiary Two [Member] |  |
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Noncontrolling Interest, Ownership Percentage by Parent | 74.00% |
HFSC | Subsidiary Three [Member] |  |
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Noncontrolling Interest, Ownership Percentage by Parent | 82.00% |
HFSC | Subsidiary Four [Member] |  |
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Noncontrolling Interest, Ownership Percentage by Parent | 84.00% |
HFSC | Subsidiary Five [Member] |  |
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Noncontrolling Interest, Ownership Percentage by Parent | 90.10% |
HFSC | Subsidiary Six [Member] |  |
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Noncontrolling Interest, Ownership Percentage by Parent | 89.00% |
HFSC | Subsidiary Seven [Member] |  |
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Noncontrolling Interest, Ownership Percentage by Parent | 96.00% |
HFSC | Subsidiary Eight [Member] |  |
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Noncontrolling Interest, Ownership Percentage by Parent | 90.00% |
HFSC | Subsidiary Nine [Member] |  |
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Noncontrolling Interest, Ownership Percentage by Parent | 90.00% |
HFSC | Subsidiary Eleven [Member] |  |
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Noncontrolling Interest, Ownership Percentage by Parent | 80.10% |
HFSC | Subsidiary Twelve [Member] |  |
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Noncontrolling Interest, Ownership Percentage by Parent | 80.10% |
HFSC | Subsidiary Thirteen [Member] |  |
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Noncontrolling Interest, Ownership Percentage by Parent | 80.10% |
HFSC | Subsidiary Fourteen [Member] |  |
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Noncontrolling Interest, Ownership Percentage by Parent | 80.10% |
HFSC | Subsidiary Fifteen [Member] |  |
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Noncontrolling Interest, Ownership Percentage by Parent | 80.10% |
HEICO Aerospace [Member] | Joint Venture [Member] |  |
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Noncontrolling Interest, Ownership Percentage by Parent | 84.00% |
HEICO Electronic [Member] | Subsidiary One [Member] |  |
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Noncontrolling Interest, Ownership Percentage by Parent | 90.70% |
HEICO Electronic [Member] | Subsidiary Sixteen [Member] |  |
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Noncontrolling Interest, Ownership Percentage by Parent | 80.10% |
HEICO Electronic [Member] | Subsidiary Seventeen [Member] |  |
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Noncontrolling Interest, Ownership Percentage by Parent | 80.10% |
HEICO Electronic [Member] | Subsidiary Eighteen [Member] |  |
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Noncontrolling Interest, Ownership Percentage by Parent | 80.10% |
HEICO Electronic [Member] | Subsidiary Nineteen [Member] |  |
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Noncontrolling Interest, Ownership Percentage by Parent | 80.10% |
HEICO Electronic [Member] | Subsidiary Twenty [Member] |  |
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Noncontrolling Interest, Ownership Percentage by Parent | 75.00% |
HEICO Electronic [Member] | Subsidiary Twenty-One [Member] |  |
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Noncontrolling Interest, Ownership Percentage by Parent | 75.00% |
HEICO Electronic [Member] | Subsidiary Twenty-Two [Member] |  |
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Noncontrolling Interest, Ownership Percentage by Parent | 80.40% |
HEICO Electronic [Member] | Subsidiary Twenty-Three [Member] |  |
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Noncontrolling Interest, Ownership Percentage by Parent | 82.50% |
HEICO Electronic [Member] | Subsidiary Twenty-Four |  |
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Noncontrolling Interest, Ownership Percentage by Parent | 88.80% |
HEICO Electronic [Member] | Subsidiary Twenty-Five |  |
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Noncontrolling Interest, Ownership Percentage by Parent | 90.00% |
HEICO Electronic [Member] | Subsidiary Twenty-Seven |  |
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Noncontrolling Interest, Ownership Percentage by Parent | 92.70% |
HEICO Electronic [Member] | Subsidiary Twenty-Eight |  |
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Noncontrolling Interest, Ownership Percentage by Parent | 95.90% |
HEICO Electronic [Member] | Subsidiary Twenty-Nine |  |
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Noncontrolling Interest, Ownership Percentage by Parent | 87.90% |
HEICO Electronic [Member] | Subsidiary Thirty |  |
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Noncontrolling Interest, Ownership Percentage by Parent | 92.50% |

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479405/805-10-25-23 + Details
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