Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Contract liabilities (deferred revenue) Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities Schedule of Revenue and Long-lived Assets by Geographic Area [Table Text Block] Schedule of Revenue and Long-lived Assets by Geographic Area [Table Text Block] Tabular disclosure of the geographic area from which revenue is material and the amount of revenue from external customers attributed to those countries. And the location of long-lived assets by geographic area. Entity Listings, Exchange [Axis] Entity Listings, Exchange [Axis] Award Timing Predetermined Award Timing Predetermined [Flag] Indefinite-lived Intangible Assets [Axis] Indefinite-Lived Intangible Assets [Axis] Entity File Number Entity File Number Capital in Excess of Par Value [Member] Additional Paid-in Capital [Member] Income Tax [Domain] Income Tax [Domain] Income Tax Tabular List, Table Tabular List [Table Text Block] Additional Financial Information Disclosure [Text Block] Additional Financial Information Disclosure [Text Block] New Accounting Pronouncements, Policy [Policy Text Block] New Accounting Pronouncements, Policy [Policy Text Block] Indefinite-Lived Intangible Assets (Excluding Goodwill), Fair Value Disclosure Indefinite-Lived Intangible Assets (Excluding Goodwill), Fair Value Disclosure Machinery, equipment and tooling Machinery and Equipment, Gross Contingent purchase consideration Business Combination, Consideration Transferred, Liabilities Incurred Guarantor Obligations, Maximum Exposure, Undiscounted Guarantor Obligations, Maximum Exposure, Undiscounted HEICO stock held by irrevocable trust Common Stock Issued, Employee Stock Trust Goodwill and Other Intangible Assets [Line Items] Goodwill [Line Items] Subsidiary Twenty-Six Subsidiary Twenty-Six [Member] Subsidiary Twenty-Six Change in long-term liabilities and assets related to HEICO LCP Increase (Decrease) in Obligation, Other Postretirement Benefits Adjustment to Compensation: Adjustment to Compensation [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Document Information, Document [Axis] Document Information, Document [Axis] Revenue from Contract with Customer [Text Block] Revenue from Contract with Customer [Text Block] Contingent consideration related to acquisition Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Period Increase (Decrease) Share-based compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-Based Compensation Cost Share-based Compensation Arrangements by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding [Table Text Block] Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding [Table Text Block] Intangible Asset, Indefinite-Lived [Table] Intangible Asset, Indefinite-Lived [Table] Current income tax expense Current Income Tax Expense (Benefit) Royalty Rate Royalty Rate [Member] Royalty Rate Adjustment to Compensation, Amount Adjustment to Compensation Amount Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Pension Plan [Member] Pension Plan [Member] Fair value of stock options, Vested Fair Value Of Stock Options Vested The total fair value of stock options vested as of the balance sheet date. Share-based Payment Arrangement, Option [Member] Share-Based Payment Arrangement, Option [Member] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Cash and Cash Equivalents, Policy [Policy Text Block] Cash and Cash Equivalents, Policy [Policy Text Block] Cash paid for income taxes Income Taxes Paid Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Cash dividends Dividends, Common Stock, Cash Total HEICO shareholders' equity Equity, Attributable to Parent Insider Trading Policies and Procedures [Line Items] Property, Plant and Equipment [Table Text Block] Property, Plant and Equipment [Table Text Block] Common stock, shares authorized Common Stock, Shares Authorized Subsidiary Nine [Member] Subsidiary Nine [Member] Subsidiary Nine [Member] Tooling [Member] Tools, Dies and Molds [Member] Noncontrolling Interest [Line Items] Noncontrolling Interest [Line Items] Acquired warranty liabilities Standard and Extended Product Warranty Accrual, Increase from Business Combination Concentrations Of Credit Risk, Policy [Policy Text Block] Concentration Risk, Credit Risk, Policy [Policy Text Block] LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Cover [Abstract] Cover [Abstract] Maximum [Member] Maximum [Member] Exercisable Weighted Average Exercise Price (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Finite-Lived Intangible Asset, Useful Life Finite-Lived Intangible Asset, Useful Life Less: Net income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Amortizing Net Carrying Amount Finite-Lived Intangible Assets, Net Property, Plant and Equipment [Table Text Block] Property, Plant and Equipment Useful Life [Table Text Block] Property, Plant and Equipment Useful Lives [Table Text Block] Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Change in Unrealized Gain (Loss) Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss) Debt Instrument [Line Items] Debt Instrument [Line Items] Debt Instrument [Line Items] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Retirement Benefits [Abstract] Retirement Benefits [Abstract] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Subsidiary Thirty Subsidiary Thirty [Member] Subsidiary Thirty Income before taxes and noncontrolling interests Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Schedule of Carrying Values and Estimated Fair Values of Debt Instruments Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Shares Available for Grant [Roll Forward] Share-based Compensation Arrangement, Shares Available for Grant [Roll Forward] Share-based Compensation Arrangement, Shares Available for Grant [Roll Forward] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Operating Segments [Member] Operating Segments [Member] Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Comprehensive income attributable to noncontrolling interests Comprehensive income (loss), attributable to noncontrolling interest Comprehensive Income (Loss), Net of Tax, Attributable to Redeemable Noncontrolling Interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Acquisitions of noncontrolling interests Payments to Noncontrolling Interests Subsidiary Sixteen [Member] Subsidiary Sixteen [Member] Subsidiary Sixteen [Member] Domestic Income (Loss) from Continuing Operations before Income Taxes, Domestic Current operating lease liabilities Operating Lease, Liability, Current Operating Lease, Liability, Current Finance Lease, Interest Expense Finance Lease, Interest Expense Document Fiscal Period Focus Document Fiscal Period Focus FY2025 Other Acquisitions FY2025 Other Acquisitions [Member] FY2025 Other Acquisitions Leases, Capital [Abstract] Leases, Capital [Abstract] Accounts Receivable, Policy [Policy Text Block] Receivable [Policy Text Block] Warranty claims settled 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Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Total purchase consideration Business Combination, Consideration Transferred Business Combination, Intangible Asset, Acquired, Finite-Lived [Table Text Block] Business Combination, Intangible Asset, Acquired, Finite-Lived [Table Text Block] Entity Emerging Growth Company Entity Emerging Growth Company Finance Lease, Weighted Average Remaining Lease Term Finance Lease, Weighted Average Remaining Lease Term Outstanding (Shares Under Option) Outstanding (Shares Under Option) Number Outstanding (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Debt Issuance Costs, Net Debt Issuance Costs, Net Lessee, Operating Lease Asset and Liabilities [Table Text Block] Lessee, Operating Lease Asset and Liabilities [Table Text Block] Tabular disclosure of the company's operating lease right of use asset and lease liabilities Indefinite-Lived Intangible Assets (Excluding Goodwill) Indefinite-Lived Intangible Assets (Excluding Goodwill) Change in accrued contingent consideration, net Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases Corporate And Eliminations [Member] Corporate And Eliminations [Member] Corporate And Eliminations [Member] Property, Plant and Equipment, Exclusive of Tooling [Member] Property, Plant and Equipment, Exclusive of Tooling [Member] Property, Plant and Equipment, Exclusive of Tooling [Member] Finance Lease, Liability, Undiscounted Excess Amount Finance Lease, Liability, Undiscounted Excess Amount Common stock, shares outstanding Common Stock, Shares, Outstanding SEC Schedule, 12-09, Allowance, Credit Loss [Member] SEC Schedule, 12-09, Allowance, Credit Loss [Member] Disaggregation of Revenue [Table Text Block] Disaggregation of Revenue [Table Text Block] Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Proceeds from Issuance of Senior Long-Term Debt Proceeds from Issuance of Senior Long-Term Debt Granted (Available for Grant) Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period Income taxes payable Accrued Income Taxes, Current Schedule of Research and Development Expenses [Table Text Block] Schedule of Research and Development Expenses [Table Text Block] Tabular disclosure of the amount of new product research and development expenses (R&D expenses) included in costs of sales. Proceeds from stock option exercises Stock Issued During Period, Value, Stock Options Exercised Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Accruals for warranties Product Warranty Accrual Increase Decrease Represents the aggregate Increase or Decrease in the liability during the reporting period for accruals related to standard and extended product warranties (including adjustments for changes in estimates). Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Debt Instrument, Interest Rate, Effective Percentage Debt Instrument, Interest Rate, Effective Percentage Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Income tax expense Income tax expense Income Tax Expense (Benefit) Income Tax Rate Reconciliation [Axis] income tax rate reconciliation [Axis] income tax rate reconciliation [Axis] Document Information [Line Items] Document Information [Line Items] Preferred Stock, shares issued Preferred Stock, Shares Issued Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Property, Plant and Equipment, Gross Property, Plant and Equipment, Gross Employer contributions to HEICO Savings and Investment Plan Defined Contribution Plan, Employer Discretionary Contribution Amount Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] Goodwill acquired Goodwill, Acquired During Period Net assets acquired, excluding cash Net assets acquired, excluding cash Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less), and Goodwill, Less Noncontrolling Interest Proceeds from stock option exercises Proceeds from Stock Options Exercised Millennium Millennium [Member] Millennium International, LLC ("Millennium") Acquisitions, net of cash acquired Cash paid, net Cash paid, net Payments to Acquire Businesses, Net of Cash Acquired Building and Building Improvements [Member] Building and Building Improvements [Member] All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Accrued expenses and other current liabilities Accrued expenses and other current liabilities Accrued Liabilities, Current Contingencies, Policy [Policy Text Block] Commitments and Contingencies, Policy [Policy Text Block] Deferred tax liabilities: Deferred Tax Liabilities, Gross [Abstract] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Redemption of common stock related to stop option exercises Common Stock Issued Repurchased and Retired Related To Stock Option Exercises The fair value of common stock repurchased by the entity that was surrendered by employees as settlement for employee tax withholding obligations due in connection with exercises of non-qualified stock options. Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Payments on short-term debt, net Repayments of Short-Term Debt Repayments of Short-Term Debt Effective Income Tax Rate Reconciliation [Table] Effective Income Tax Rate Reconciliation [Table] Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation [Axis] Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation [Axis] Property, Plant and Equipment, Useful Life Property, Plant and Equipment, Useful Life Preferred Stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Subsequent Event Subsequent Event [Member] Revenues from External Customers and Long-Lived Assets [Line Items] Revenues from External Customers and Long-Lived Assets [Line Items] Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] PEO Total Compensation Amount PEO Total Compensation Amount Depreciation Depreciation Long-Term Debt, Type [Axis] Long-Term Debt, Type [Axis] Money Market Funds [Member] Money Market Funds [Member] Classification Type [Domain] Classification Type [Domain] [Domain] for Classification Type [Axis] Finance Lease, Liability, to be Paid, Year Four Finance Lease, Liability, to be Paid, Year Four Assets acquired: Business Combination, Recognized Asset Acquired, Asset [Abstract] Foreign Line of Credit [Member] Foreign Line of Credit [Member] Equity Components [Axis] Equity Components [Axis] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Adjustments to redemption amount of redeemable noncontrolling interests Adjustments to redemption amount of redeemable noncontrolling interests Noncontrolling Interest, Change in Redemption Value Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Income Tax [Line Items] Income Tax [Line Items] Income Tax Number of Reportable Segments Number of Reportable Segments Business Combination, Contingent Consideration, Liability, Measurement Input Business Combination, Contingent Consideration, Liability, Measurement Input Classification Type [Axis] Classification Type [Axis] Classification Type [Axis] Entity Address, State or Province Entity Address, State or Province Finance Lease, Principal Payments Finance Lease, Principal Payments Amendment and termination of contingent consideration agreement Business Combination, Reversal of Remaining Contingent Consideration, Liability Business Combination, Reversal of Remaining Contingent Consideration, Liability Amount of contingent consideration reversed during the period, due to the termination of the contingent consideration agreement. Subsidiary Twelve [Member] Subsidiary Twelve [Member] Subsidiary Twelve [Member] Total current liabilities Liabilities, Current Inventories Deferred Tax Assets, Inventory Individual: Individual [Axis] Defined Contribution Plan, Employer Discretionary Contribution Amount Defined Contribution Plan, Cost Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Cash dividends paid Payments of Ordinary Dividends, Common Stock Document Annual Report Document Annual Report Gables Gables [Member] Gables Engineering Entities [Table] Entities [Table] Subsidiary Three [Member] Subsidiary Three [Member] Amortization Amortization Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Percentage of interest owned by noncontrolling shareholders Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners Subsidiary, Ownership Percentage, Noncontrolling Owner Deferred Tax Asset, In-Process Research and Development Deferred Tax Asset, In-Process Research and Development Entity Interactive Data Current Entity Interactive Data Current Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] Business Combination, Reason for Business Combination Business Combination, Reason for Business Combination Joint Venture [Member] Joint Venture [Member] Joint Venture [Member] Defined Benefit Plan, Funded (Unfunded) Status of Plan Defined Benefit Plan, Funded (Unfunded) Status of Plan Revenue from Contract with Customer [Policy Text Block] Revenue from Contract with Customer [Policy Text Block] Exercisable Aggregate Intrinsic Value (in dollars) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Current maturities of long-term debt Long-Term Debt and Lease Obligation, Current Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] Subsidiary Twenty-Five Subsidiary Twenty-Five [Member] Subsidiary Twenty-Five Temporary Equity, Other Temporary Equity, Other Changes Ownership [Domain] Ownership [Domain] Finance Lease, Liability, to be Paid, Year Two Finance Lease, Liability, to be Paid, Year Two Senior Notes [Abstract] Senior Notes [Abstract] Valuation Allowances and Reserves, Opening Balance Valuation Allowances and Reserves, Ending Balance SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration] Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration] Other assets Other Assets, Noncurrent Customer [Domain] Customer [Domain] Interest Payable, Current Interest Payable, Current Entity Central Index Key Entity Central Index Key SEC Schedule, 12-09, Reserve, Inventory [Member] SEC Schedule, 12-09, Reserve, Inventory [Member] PEO Name PEO Name Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax, Beginning Balance Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax, Ending Balance Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax Accrued expenses Accrued Expenses Assumed Amount of accrued expenses assumed at the acquisition date. Net sales Net sales Revenues Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Supplemental Cash Flow Elements [Abstract] Supplemental Cash Flow Elements [Abstract] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Liabilities, Opening Balance Liabilities, Ending Balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Defined Benefit Plan [Table] Defined Benefit Plan [Table] Contract liabilities, Current Contract with Customer, Liability, Current Description of Acquired Entity Business Combination, Description of Acquiree Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Work in process Inventory, Work in Process, Net of Reserves Exercise Price Award Exercise Price Entity Filer Category Entity Filer Category Class of Stock [Domain] Class of Stock [Domain] Class of Stock [Domain] Corporate Owned Life Insurance [Member] Corporate Owned Life Insurance [Member] Corporate owned life insurance [Member] Federal statutory income tax rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Inventory, Current [Table] Inventory, Current [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Estimated Amortization expense related to intangible assets, year three Finite-Lived Intangible Asset, Expected Amortization, Year Three Deferred tax assets: Deferred Tax Assets, Net [Abstract] Gross Carrying Amount Finite-Lived Intangible Assets, Gross Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Repair and Overhaul Parts and Services [Member] Repair and Overhaul Parts and Services [Member] Repair and Overhaul Parts and Services [Member] Entity Address, Address Line One Entity Address, Address Line One Redeemable noncontrolling interests Redeemable noncontrolling interests Redeemable noncontrolling interests Redeemable Noncontrolling Interest, Equity, Carrying Amount Temporary Equity, Including Noncontrolling Interest Aggregate Redemption Amount Puttable Aggregate Redemption Amount Puttable The aggregate redemption amount currently puttable as of the Balance Sheet date, including the aggregate redemption amount of any put rights becoming puttable within twelve months from the Balance Sheet date. R&D expenses Research and Development Expense FY2006 Acquisition Subsidiary 1 FY2006 Acquisition Subsidiary 1 [Member] FY2006 Acquisition Subsidiary 1 Accumulated Other Comprehensive Income (Loss) [Member] AOCI Attributable to Parent [Member] Less: Allowance for doubtful accounts Accounts Receivable, Allowance for Credit Loss, Current Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Subsidiary Four [Member] Subsidiary Four [Member] Stock Issued Stock Issued Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] Ownership [Axis] Ownership [Axis] Fair Value as of Grant Date Award Grant Date Fair Value Business Acquisition, Acquisition Costs Business Acquisition, Acquisition Costs Amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition recognized in the reporting period. Schedule of Long-term Debt Instruments [Table Text Block] Schedule of Long-Term Debt Instruments [Table Text Block] Effect of dilutive stock options Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Total operating costs and expenses Costs and Expenses Pre-tax unrecognized compensation expense related to nonvested stock options Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Entity Listings [Line Items] Entity Listings [Line Items] Other Significant Noncash Transaction, Value of Consideration Received Other Significant Noncash Transaction, Value of Consideration Received Long-Term Debt, Fair Value Long-Term Debt, Fair Value Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Lessee, Operating Lease, Liability, to be Paid, Year Two Lessee, Operating Lease, Liability, to be Paid, Year Two Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Outstanding Weighted Average Contractual Life (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Line of Credit Facility Change in Borrowing Capacity Line of Credit Facility Change in Borrowing Capacity The amount of additional borrowing capacity under the credit facility that the company is allowed to borrow through increased commitments. Schedule Of Accrued Expenses and Other Current Liabilities [Table Text Block] Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] Line of Credit Facility, Increase (Decrease), Net Line of Credit Facility, Increase (Decrease), Net Rosen Rosen [Member] Rosen Aviation, LLC ("Rosen") Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Temporary Equity Disclosure [Abstract] Temporary Equity Disclosure [Abstract] Cash paid Payments to Acquire Businesses, Gross Non-PEO NEO Non-PEO NEO [Member] Outstanding Aggregated Intrinsic Value (in dollars) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value Less: Foreign currency translation adjustments attributable to noncontrolling interests Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest Operating lease right-of-use assets Deferred Tax Liabilities, Leasing Arrangements Preferred Stock, Dividend Rate, Percentage Preferred Stock, Dividend Rate, Percentage Additional purchase consideration Business Combination, Consideration Transferred, Tangible and Intangible Assets, Excluding Cash Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Other Other Intangible Assets [Member] Award Type [Domain] Award Type [Domain] Lessee, Operating Lease, Liability, to be Paid, Year One Lessee, Operating Lease, Liability, to be Paid, Year One Noncontrolling interests Equity, Attributable to Noncontrolling Interest Equity Awards Adjustments Equity Awards Adjustments [Member] Leasehold Improvements [Member] Leasehold Improvements [Member] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Compensation Amount Outstanding Recovery Compensation Amount Deferred: Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] EthosEnergy Ltd EthosEnergy Ltd [Member] EthosEnergy Accessories & Components Ltd Noncontrolling Interest, Change in Redemption Value Redeemable Noncontrolling Interest Based On Multiple Of Earnings The portion of the estimated redemption amount based solely on a multiple of future earnings. Dividend yield Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Electronic Components for Defense, Space and Aerospace [Member] Electronic Components for Defense, Space and Aerospace [Member] Electronic Components for Defense, Space and Aerospace [Member] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Liability, Revenue Recognized Contract with Customer, Liability, Revenue Recognized Retirement Plan Type [Domain] Retirement Plan Type [Domain] SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Change in accrued contingent consideration Payment of contingent consideration Business Combination, Contingent Consideration, Change in Contingent Consideration, Liability, Increase (Decrease) Intellectual Property, Gross Finite-Lived Intellectual Property, Gross Gross carrying amount before accumulated amortization as of the balance sheet date of capitalized intellectual property having a finite beneficial life. Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Customer Relationships, Gross Finite-Lived Customer Relationships, Gross Accumulated other comprehensive (loss) income Accumulated Other Comprehensive Income (Loss), Balance Start Accumulated Other Comprehensive Income (Loss), Balance End Accumulated Other Comprehensive Income (Loss), Net of Tax Long-term debt, net of current maturities Long-Term Debt and Lease Obligation Financial Instruments [Domain] Financial Instruments [Domain] Total deferred tax liabilities Deferred Tax Liabilities, Gross Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] FY2023 Other Acquisitions FY2023 Other Acquisitions [Member] FY2023 Other Acquisitions Inventories, net Inventories, net of valuation reserves Inventory, Net Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Minimum [Member] Minimum [Member] Adjustments to goodwill Goodwill, Measurement Period Adjustment Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Company Selected Measure Name Company Selected Measure Name 2033 Senior Notes 2033 Senior Notes [Member] 2033 Senior Notes Debt Disclosure Debt Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Trade accounts payable Accounts Payable, Current Operating Lease, Payments Operating Lease, Payments Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Subsidiary Twenty [Member] Subsidiary Twenty [Member] Subsidiary Twenty Stockholders' Equity Note [Abstract] Stockholders' Equity Note [Abstract] Measurement Input, Long-term Revenue Growth Rate [Member] Measurement Input, Long-Term Revenue Growth Rate [Member] Foreign Current Foreign Tax Expense (Benefit) Goodwill [Roll Forward] Goodwill [Roll Forward] Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Disclosure [Text Block] Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Weighted Average Number of Shares Outstanding, Diluted Defense and Space [Member] Defense and Space [Member] Customers within the Defense and Space industries [Member] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Reconciliation of Assets from Segment to Consolidated [Table] Reconciliation of Assets from Segment to Consolidated [Table] Business Combination, Recognized Liability Assumed, Long-Term Debt, Current Business Combination, Recognized Liability Assumed, Long-Term Debt, Current Entity Small Business Entity Small Business Business Combination, Voting Equity Interest Acquired, Percentage Business Combination, Voting Equity Interest Acquired, Percentage Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Stock Issued During Period, Shares, Acquisitions, Registered Portion Stock Issued During Period, Shares, Acquisitions, Registered Portion Stock Issued During Period, Shares, Acquisitions, Registered Portion State Current State and Local Tax Expense (Benefit) Document Transition Report Document Transition Report Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Other assets Business Combination, Recognized Asset Acquired, Other Asset, Noncurrent Acquired Finite Lived And Indefinite Lived Intangible Assets [Line Items] Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items] Finance Lease, Liability, Payment, Due Finance Lease, Liability, to be Paid Debt Related Commitment Fees and Debt Issuance Costs Debt Related Commitment Fees and Debt Issuance Costs Underlying Securities Award Underlying Securities Amount Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date HEICO Aerospace [Member] HEICO Aerospace [Member] HEICO Aerospace [Member] Income Tax Disclosure [Text Block] Income Tax Disclosure [Text Block] Common Class A [Member] Common Class A [Member] Other Finite-Lived Intangible Assets, Gross Other Finite-Lived Intangible Assets, Gross Payment for Contingent Consideration Liability, Financing Activities Payment for Contingent Consideration Liability, Financing Activities Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Exercisable Weighted Average Contractual Life (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted 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Percentage Operating Lease, Variable Lease Expense Operating Lease, Variable Lease Expense Amount of variable lease cost, excluded from lease liability, recognized when obligation for payment is incurred for operating leases. 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Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Year Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Year Subsidiary Two [Member] Subsidiary Two [Member] Stockholders' Equity, Other Stockholders' Equity, Other Business Combination, Contingent Consideration [Line Items] Business Combination, Contingent Consideration [Line Items] Lessee, Operating Lease, Liability, Undiscounted Excess Amount Lessee, Operating Lease, Liability, Undiscounted Excess Amount HEICO Electronic [Member] Heico Electronic Technologies Corp [Member] HEICO Electronic Technologies Corp is a principal subsidiary of HEICO Corporation. Finance leases and notes payable Finance Leases and Note Payable Present value of lessee's discounted obligation for lease payments from finance lease and the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer. Estimated Amortization expense related to intangible assets, year two Finite-Lived Intangible Asset, Expected Amortization, Year Two SVM SVM [Member] SVM Private Limited Granted (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Accrued employee compensation and related payroll taxes Employee-related Liabilities, Current Lessee, Operating Lease, Liability, to be Paid Lessee, Operating Lease, Liability, to be Paid Credit Facility, Current Borrowing Capacity Line of Credit Facility, Current Borrowing Capacity Distributions to noncontrolling interests Distributions to noncontrolling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Trade Names [Member] Trade Names [Member] Total customer rebates and credits deducted within net sales Accrued Customer Rebates and Credits Expense The total customer rebates and credits expense deducted within net sales. Intersegment Eliminations Intersegment Eliminations [Member] Expiration Date Trading Arrangement Expiration Date Assets Held under Capital Leases [Member] Assets Held under Capital Leases [Member] Estimated Amortization expense related to intangible assets, year five Finite-Lived Intangible Asset, Expected Amortization, Year Five Shareholders' equity: Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Property, plant and equipment, net Property, plant and equipment, net Property, Plant and Equipment, Net Property, Plant and Equipment, Net Amount of contingent purchase consideration, the company could be required to pay Business Combination, Contingent Consideration, Range of Outcomes, Maximum, Amount Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Inventory, Policy [Policy Text Block] Inventory, Policy [Policy Text Block] Cancelled (Available for Grant) Share-Based Compensation Arrangement by Share-Based Payment Award, Other Share Increase (Decrease) Entity Current Reporting Status Entity Current Reporting Status Subsidiary Twenty-One [Member] Subsidiary Twenty-One [Member] Subsidiary Twenty-One Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Consolidated Entities [Domain] Consolidated Entities [Domain] Sales by Industry [Member] Sales by Industry [Member] Sales by Industry [Member] Percentage of Voting Interests Sold Percentage of Voting Interests Sold Percentage of Voting Interests Sold Subsidiary Eleven [Member] Subsidiary Eleven [Member] Subsidiary Eleven [Member] Corporate Segment Corporate Segment [Member] Financial Instrument [Axis] Financial Instrument [Axis] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Executive Category: Executive Category [Axis] Canada, Dollars Canada, Dollars Tax benefit related to stock option exercises Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-Based Payment Arrangement, Percent SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] State taxes, less applicable federal income tax reduction Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent Schedule Of Acquired Finite And Indefinite Lived Intangible Assets By Major Class [Table] Schedule Of Acquired Finite and Indefinite Lived Intangible Assets By Major Class [Table] Schedule Of Acquired Finite and Indefinite Lived Intangible Assets By Major Class [Table] Other comprehensive (loss) income: Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract] Finance Lease, Liability, Current Finance Lease, Liability, Current Interest Expense, Operating and Nonoperating Interest Expense, Operating and Nonoperating Current Fiscal Year End Date Current Fiscal Year End Date FY2022 Acquisition Subsidiary 2 FY2022 Acquisition Subsidiary 2 [Member] FY2022 Acquisition Subsidiary 2 Flight Support Group [Member] Flight Support Group [Member] Flight Support Group. Expected option life (years) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Schedule of Accounts Receivable [Table Text Block] Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Opening Balance Outstanding Shares (Shares Available For Grant) Ending Balance Outstanding Shares (Shares Available For Grant) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Earnings Per Share, Basic, by Common Class, Including Two-Class Method [Table] Earnings Per Share, Basic, by Common Class, Including Two-Class Method [Table] Weighted average fair value Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Subsidiary Twenty-Seven Subsidiary Twenty-Seven [Member] Subsidiary Twenty-Seven Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Subsidiary Fifteen [Member] Subsidiary Fifteen [Member] Subsidiary Fifteen [Member] Accounts receivable, net Accounts receivable, net Receivables, Net, Current Document [Domain] Document [Domain] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Issuance of common stock for an acquisition Stock Issued During Period, Value, Acquisitions Balances as of beginning of year Balances as of end of year Gross unrecognized tax benefits related to uncertain tax positions Unrecognized Tax Benefits Proceeds from Debt, Net of Issuance Costs Proceeds from Debt, Net of Issuance Costs Anti-dilutive stock options excluded Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Weighted average number of common shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] FY2022 Acquisition Subsidiary 3 FY2022 Acquisition Subsidiary 3 [Member] FY2022 Acquisition Subsidiary 3 Noncontrolling interests in consolidated subsidiaries Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value Subsidiary Twenty-Eight Subsidiary Twenty-Eight [Member] Subsidiary Twenty-Eight Lessee, Operating Leases Lessee, Operating Leases [Text Block] Net cash (used in) provided by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Measure: Measure [Axis] Heico Corporation Heico Corporation [Member] Heico Corporation Valuation Approach and Technique [Axis] Valuation Approach and Technique [Axis] Estimated Amortization expense related to intangible assets, year, there after Finite-Lived Intangible Asset, Expected Amortization, after Year Five Redeemable Noncontrolling Interests, Policy [Policy Text Block] Noncontrolling Interests Policy [Policy Text Block] Disclosure of accounting policy for noncontrolling interests. Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Stock Options Outstanding [Abstract] Stock Options Outstanding [Abstract] Stock Options Outstanding Stock Option and Future Grants [Member] Stock Option and Future Grants [Member] Stock Option and Future Grants Member. Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Risk-free interest rate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Entity Tax Identification Number Entity Tax Identification Number Asset Acquisition [Axis] Asset Acquisition [Axis] Outstanding (in dollars per share) Outstanding (in dollars per share) Outstanding Weighted Average Exercise Price (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price HEICO Stock Held By Irrevocable Trust [Member] HEICO Stock Held By Irrevocable Trust [Member] HEICO stock held by irrevocable trust. Share-based compensation expense Stock or Unit Option Plan Expense Common stock, shares issued Common Stock, Shares, Issued FY2024 Acquisitions FY2024 Acquisitions [Member] FY2024 Acquisitions Operating Lease, Weighted Average Remaining Lease Term Operating Lease, Weighted Average Remaining Lease Term Redeemable Noncontrolling Interest [Table Text Block] Redeemable Noncontrolling Interest [Table Text Block] Contract assets Contract assets, current Contract with Customer, Asset, before Allowance for Credit Loss, Current Goodwill and Intangible Assets Disclosure [Text Block] Goodwill and Intangible Assets Disclosure [Text Block] Entity Public Float Entity Public Float Schedule of Goodwill [Table Text Block] Schedule of Goodwill [Table Text Block] Trading Arrangement: Trading Arrangement [Axis] Income taxes payable Increase (Decrease) in Income Taxes Payable Total Shareholder Return Amount Total Shareholder Return Amount Product Warranties, Policy [Policy Text Block] Guarantees, Indemnifications and Warranties Policies [Policy Text Block] Security Exchange Name Security Exchange Name Class of Warrant or Right, Date from which Warrants or Rights Exercisable Earliest Put Right Year Earliest fiscal period in which Redeemable Noncontrolling Interest maybe put to the company. FY 2017 Acquisition [Member] FY 2017 Acquisition [Member] FY 2017 Acquisitions [Member] Tax Exempt Gains on Corporate-owned Life Insurance Policies Tax Exempt Gains on Corporate-owned Life Insurance Policies Tax Exempt Gains on Corporate-owned Life Insurance Policies Name Of Acquired Product Line Name Of Acquired Product Line Name Of Acquired Product Line Electronic Technologies Group [Member] Electronic Technologies Group [Member] Electronic Technologies Group. Credit Facility, Maximum Borrowing Capacity Line of Credit Facility, Maximum Borrowing Capacity Subsidiary Seven [Member] Subsidiary Seven [Member] Subsidiary Seven [Member] Wencor Wencor [Member] Wencor Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-Lived Intangible Assets, Major Class Name [Domain] Subsidiary Eighteen [Member] Subsidiary Eighteen [Member] Subsidiary Eighteen Line of Credit Facility, Interest Rate During Period Line of Credit Facility, Interest Rate During Period Increase (Decrease) in Temporary Equity [Roll Forward] Increase (Decrease) in Temporary Equity [Roll Forward] Temporary Equity Redeemable Noncontrolling Interests [Text Block] Temporary Equity Redeemable Noncontrolling Interests [Text Block] This element includes disclosure about the estimated amount required to meet the entity's obligations as of the balance sheet date under put options held by owners of equity interests in certain of the entity's subsidiaries. Schedule Of Acquired Finite and Indefinite Lived Intangible Assets By Major Class [Line Items] Schedule Of Acquired Finite and Indefinite Lived Intangible Assets By Major Class [Line Items] Schedule Of Acquired Finite and Indefinite Lived Intangible Assets By Major Class [Line Items] Total Shareholders Equity [Member] Total Shareholders Equity [Member] Total Shareholders Equity, not including Redeemable Noncontrolling Interests Statement [Line Items] Statement [Line Items] Statement [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Subsequent Event [Line Items] Subsequent Event [Line Items] Common Stock [Member] Common Stock [Member] MPS MPS [Member] Marway Power Solutions Inc Net increase (decrease) in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Segment Reporting, Reconciling Item For Operating Profit (Loss) and Capital Expenditure From Segment To Consolidated [Line Items] Segment Reporting, Reconciling Item For Operating Profit (Loss) and Capital Expenditure From Segment To Consolidated [Line Items] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Entity Listings [Table] Entity Listings [Table] Additional purchase consideration Other Significant Noncash Transaction, Value of Consideration Given Cash dividends per share (in dollars per share) Common Stock, Dividends, Per Share, Cash Paid MC2 MC2 [Member] Mid Continent Controls Inc Significant Accounting Policies [Text Block] Significant Accounting Policies [Text Block] Statistical Measurement [Domain] Statistical Measurement [Domain] Property, plant and equipment Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment Business Combination [Abstract] Business Combination [Abstract] Lessee, Operating Lease, Liability, to be Paid, after Year Five Lessee, Operating Lease, Liability, to be Paid, after Year Five Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Balances as of beginning of year Balances as of end of year Standard and Extended Product Warranty Accrual Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Total Gross Carrying Amount Intangible Assets, Gross (Excluding Goodwill) Goodwill, Expected Tax Deductible Amount Business Combination, Goodwill, Expected Tax Deductible, Amount Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Leases [Abstract] Increases related to prior year tax positions Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Intangible Asset, Acquired, Finite-Lived [Line Items] Intangible Asset, Acquired, Finite-Lived [Line Items] FY 2019 Acquisition 1 FY 2019 Acquisition 1 [Member] FY 2019 Acquisition 1 Trade accounts payable Increase (Decrease) in Accounts Payable Share-based Payment Arrangement, Decrease for Tax Withholding Obligation Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Basic (in dollars per share) Earnings Per Share, Basic Earnings Per Share, Basic Common Stock, Capital Shares Reserved for Future Issuance Common Stock, Capital Shares Reserved for Future Issuance Amortizing Assets: Finite-Lived Intangible Assets, Gross [Abstract] Entity Listing, Par Value Per Share Entity Listing, Par Value Per Share Deferred Tax Assets, Gross Deferred Tax Assets, Gross Tax benefit from stock option exercises Share-Based Payment Arrangement, Exercise of Option, Tax Benefit Measurement Input, Discount Rate [Member] Measurement Input, Discount Rate [Member] Unrealized gain/(loss) Other Comprehensive Income (Loss), Net of Tax Schedule of Segment Reporting Information by Segment [Table Text Block] Schedule of Segment Reporting Information, by Segment [Table Text Block] Stock Options Exercisable [Abstract] Stock Options Exercisable [Abstract] Stock Options Exercisable Denominator: Denominator [Abstract] Denominator. Remaining Performance Obligation, Amount Revenue, Remaining Performance Obligation, Amount Measurement Input Type [Domain] Measurement Input Type [Domain] Schedule of Fair Value of Total Consideration [Table Text Block] Schedule of Fair Value of Total Consideration [Table Text Block] Schedule of the fair value of total consideration associated with the acquisition as of the acquisition date. [Table Text Block] Income Tax Rate Reconciliation [Domain] Income Tax Rate Reconciliation [Domain] [Domain] for income tax rate reconciliation [Axis] Finance Lease, Liability, to be Paid, Year Three Finance Lease, Liability, to be Paid, Year Three Indefinite-Lived Intangible Assets [Line Items] Indefinite-Lived Intangible Assets [Line Items] Existing Management [Member] Existing Management [Member] Existing Management [Member] Customer Rebates and Credits, Policy [Policy Text Block] Customer Rebates and Credits Policy [Policy Text Block] Disclosure of accounting policy for customer rebates and credits. Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Accounts and Financing Receivables [Table] Accounts and Financing Receivables [Table] Shares available for issuance, Opening Balance Shares available for issuance, Ending Balance Shares Available for Issuance The maximum number of shares permitted to be issued to a defined contribution plan. Share-based Payment Arrangement, Expense Share-Based Payment Arrangement, Expense Net Contract Liabilities Net Contract Liabilities Total customer advances and billings in excess of revenue recognized, in excess of total revenue recognized on contracts using an over-time recognition model in excess of amounts invoiced to the customer. Segment Reporting, Asset Reconciling Item [Line Items] Segment Reporting, Asset Reconciling Item [Line Items] Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Issuance of common stock to 401(k) Plan Stock Issued During Period, Shares, Employee Benefit Plan Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Current assets: Assets, Current [Abstract] Total liabilities and equity Liabilities and Equity Foreign Currency Translation, Policy [Policy Text Block] Foreign Currency Transactions and Translations Policy [Policy Text Block] Pension Benefit Obligation [Member] Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Stock Issued During Period, Shares, Acquisitions Stock Issued During Period, Shares, Acquisitions Shares Outstanding [Roll Forward] Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward] Senior Notes, Noncurrent Senior Notes, Noncurrent Other Deferred Tax Assets, Other Accounting Policies [Abstract] Accounting Policies [Abstract] Reconciliation Of Operating Profit (Loss) and Capital Expenditure From Segments To Consolidated [Table] Reconciliation Of Operating Profit Loss and Capital Expenditure From Segments To Consolidated [Table] Identification, description, and amounts of all significant reconciling items in the reconciliation of total profit or loss and capital expenditure from reportable segments to the entity's consolidated income before income taxes, cash flows, extraordinary items, and discontinued operations. Lessee, Operating Lease, Liability, Maturity [Table Text Block] Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Pay vs Performance Disclosure [Line Items] Operating Lease, Liability Operating Lease, Liability Operating Lease, Liability Liabilities [Abstract] Liabilities [Abstract] Business Combination [Text Block] Business Combination [Text Block] Finance Lease, Right-of-Use Asset, Amortization Finance Lease, Right-of-Use Asset, Amortization Other Electronic Components [Member] Other Electronic Components [Member] Other Electronic Components [Member] Subsidiary Twenty-Four Subsidiary Twenty-Four [Member] Subsidiary Twenty-Four Noncontrolling interests assumed related to acquisition Noncontrolling Interest, Increase from Business Combination Other long-term liabilities Other Liabilities, Noncurrent Long-Term Debt, Current Maturities Long-Term Debt, Current Maturities Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount Lessee, Operating Lease, Liability, to be Paid, Year Three Lessee, Operating Lease, Liability, to be Paid, Year Three Debt Issuance Costs, Gross Debt Issuance Costs, Gross Comprehensive income (loss), attributable to HEICO Comprehensive income (loss), attributable to HEICO Comprehensive Income (Loss), Net of Tax, Attributable to Parent Contingent purchase consideration Noncash or Part Noncash Acquisition, Net Nonmonetary Assets Acquired (Liabilities Assumed) Measurement Input Type [Axis] Measurement Input Type [Axis] Name Measure Name Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Credit Facility [Abstract] Line of Credit Facility [Abstract] Forfeiture rate Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Forfeiture Rate The estimated forfeiture rate of the underlying shares over the option's term. Subsidiary Fourteen [Member] Subsidiary Fourteen [Member] Subsidiary Fourteen [Member] Deferred income taxes Deferred Income Tax Liabilities, Net Debt Instrument, Description Debt Instrument, Description SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] Legal Entity [Axis] Legal Entity [Axis] Total assets Total assets Assets Estimated Amortization expense related to intangible assets, year one Finite-Lived Intangible Asset, Expected Amortization, Year One Subsidiary Eight [Member] Subsidiary Eight [Member] Subsidiary Eight [Member] Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax Geographical [Domain] Geographical [Domain] Income Taxes, Policy [Policy Text Block] Income Tax, Policy [Policy Text Block] Operating Activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Research and development tax credits Effective Income Tax Rate Reconciliation, Tax Credit, Research, Percent Segment Reporting, Other Segment Item, Amount Segment Reporting, Other Segment Item, Amount Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life Estimated Amortization expense related to intangible assets, year four Finite-Lived Intangible Asset, Expected Amortization, Year Four Finance Lease, Liability, to be Paid, Year One Finance Lease, Liability, to be Paid, Year One Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Description of Acquired Product Line Description of Acquired Product Line Description of Acquired Product Line Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Total assets acquired, excluding cash Total assets acquired, excluding cash Business Combination, Recognized Asset Acquired, Asset Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Document Financial Statement Error Correction [Flag] Document Financial Statement Error Correction [Flag] Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Business Combination [Domain] Business Combination [Domain] Business Combination [Domain] SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Other Account SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Other Account Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Plan Name [Axis] Plan Name [Axis] Property, Plant and Equipment, Depreciation Method [Extensible Enumeration] Property, Plant and Equipment, Depreciation Method [Extensible Enumeration] Property, Plant and Equipment, Policy [Policy Text Block] Property, Plant and Equipment, Policy [Policy Text Block] Document Information [Table] Document Information [Table] PEO PEO [Member] ELT ELT [Member] Aircraft Emergency Locator Transmitter Impairment, Intangible Asset, Indefinite-Lived, Segment [Extensible Enumeration] Impairment, Intangible Asset, Indefinite-Lived, Segment [Extensible Enumeration] Changes in operating assets and liabilities, net of acquisitions: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Schedule of Product Warranty Liability [Table Text Block] Schedule of Product Warranty Liability [Table Text Block] Property, plant and equipment Deferred Tax Liabilities, Property, Plant and Equipment Expected stock price volatility Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, 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Ltd. 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