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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Textuals) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jan. 31, 2023
Apr. 30, 2022
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 certain customer relationships amortized on an accelerated method) over the following estimated useful lives
Acquisition Costs     $ 25,400
Deferred Tax Expense from Stock Options Exercised $ 6,200 $ 17,800  
Business Combination, Acquisition Related Costs     21,600
Interest Expense     $ 3,800
Lufthansa Technik Ag [Member] | HFSC      
Organization, Consolidation and Presentation of Financial Statements [Abstract]      
Percentage of interest owned by noncontrolling shareholders     20.00%
HFSC | Subsidiary One [Member]      
Organization, Consolidation and Presentation of Financial Statements [Abstract]      
Noncontrolling Interest, Ownership Percentage by Parent     70.00%
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     85.00%
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 Ten [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 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     85.00%
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-Six      
Organization, Consolidation and Presentation of Financial Statements [Abstract]      
Noncontrolling Interest, Ownership Percentage by Parent     91.00%
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%