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EMPLOYEE RETIREMENT PLANS | 12 Months Ended
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Oct. 31, 2023
Retirement Benefits [Abstract] |
Pension and Other Postretirement Benefits Disclosure [Text Block] | EMPLOYEE RETIREMENT PLANS The HEICO Savings and Investment Plan (the “401(k) Plan”) is a qualified defined contribution retirement plan under which eligible employees of the Company and its participating subsidiaries may make Elective Deferral Contributions up to the limitations set forth in Section 402(g) of the Internal Revenue Code. The Company generally makes a 50% Employer Matching Contribution, as determined by the Board of Directors, based on a participant’s Elective Deferral Contribution up to 6% of the participant’s Compensation for the Elective Deferral Contribution period. The 401(k) Plan also provides that the Company may make additional Employer Contributions. Employer Contributions may be contributed in the form of the Company’s common stock or cash, as determined by the Company. Employer Contributions awarded in the form of Company common stock are valued based on the fair value of the underlying shares as of the effective date of contribution. Employer Contributions may be diversified by a participant into any of the participant-directed investment options of the 401(k) Plan; however, Employee Contributions may not be invested in Company common stock. Unless specified otherwise, all capitalized terms herein are defined in the 401(k) Plan document. Participants receive 100% vesting in Employee Contributions and on cash dividends received on Company common stock. Vesting in Employer Contributions is based on a participant’s number of Years of Service. Employer Contributions to the 401(k) Plan charged to income in fiscal 2023, 2022 and 2021 totaled $15.3 million, $12.2 million and $10.1 million, respectively, and were made through the issuance of new shares of Company common stock and the use of forfeited shares within the 401(k) Plan. Information concerning share-based activity pertaining to the 401(k) Plan for each of the last three fiscal years ended October 31 is as follows (in thousands):
| Common Stock |  | Class A Common Stock
Shares available for issuance as of October 31, 2020 | 228 |  |  | 228 |
Issuance of common stock to the 401(k) Plan | (40) |  |  | (40) |
Shares available for issuance as of October 31, 2021 | 188 |  |  | 188 |
Issuance of common stock to the 401(k) Plan | (43) |  |  | (43) |
Shares available for issuance as of October 31, 2022 | 145 |  |  | 145 |
Issuance of common stock to the 401(k) Plan | (48) |  |  | (48) |
Shares available for issuance as of October 31, 2023 | 97 |  |  | 97 |

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