XML 47 R37.htm IDEA: XBRL DOCUMENT
v3.24.0.1

SELECTED FINANCIAL STATEMENT INFORMATION (Details Textuals) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Jan. 31, 2024 | Jan. 31, 2023 | Oct. 31, 2023
Selected Financial Statement Information (Details) [Abstract] |  |  |
Accrued customer rebates and credits | $ 27,500 |  | $ 24,500
Total customer rebates and credits deducted within net sales | $ 3,500 | $ 2,200 |
FY 2015 Acquisition [Member] | Flight Support Group [Member] | Flight Support Group [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners | 19.90% |  |
Noncontrolling Interest, Ownership Percentage by Parent | 90.10% |  |

X
- Definition Carrying value as of the balance sheet date of accrued customer rebates and credits. + References No definition available. + Details
Name: | hei_AccruedCustomerRebatesAndCredits
Namespace Prefix: | hei_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The total customer rebates and credits expense deducted within net sales. + References No definition available. + Details
Name: | hei_AccruedCustomerRebatesAndCreditsExpense
Namespace Prefix: | hei_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Selected Financial Statement Information (Details) [Abstract] + References No definition available. + Details
Name: | hei_SelectedFinancialStatementInformationDetailsAbstract
Namespace Prefix: | hei_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479907/805-20-50-5 + Details
Name: | us-gaap_BusinessAcquisitionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity. + References No definition available. + Details
Name: | us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
Name: | us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=hei_FY2015AcquisitionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_OwnershipAxis=hei_FlightSupportGroupMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=hei_FlightSupportGroupMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |