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ACQUISITIONS (Tables) | 12 Months Ended
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Oct. 31, 2018
Business Acquisition [Line Items] |
Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block] | The following table summarizes the weighted average amortization period of the definite-lived intangible assets acquired in connection with the Company's other fiscal 2018, 2017 and 2016 acquisitions (in years):
| Year ended October 31,
| 2018 |  | 2017 |  | 2016
Customer relationships | 7 |  | 12 |  | 11
Trade names | — |  |  | — |  |  | 15
Intellectual property | 10 |  | 13 |  | 15
Other Acquisitions [Member] |
Business Acquisition [Line Items] |
Schedule of Fair Value of Total Consideration [Table Text Block] | The following table summarizes the aggregate total consideration for the Company's other acquisitions (in thousands):
| Year ended October 31,
| 2018 |  | 2017 |  | 2016
Cash paid |  | $61,931 |  |  |  | $109,346 |  |  |  | $11,000 |
Less: cash acquired | (4,000 | ) |  | (7,713 | ) |  | — |
Cash paid, net | 57,931 |  |  | 101,633 |  |  | 11,000 |
Contingent consideration | — |  |  | — |  |  | 1,225 |
Additional purchase consideration | (407 | ) |  | 1,300 |  |  | — |
Total consideration |  | $57,524 |  |  |  | $102,933 |  |  |  | $12,225 |
Schedule of Purchase Price Allocation [Table Text Block] | The following table summarizes the allocation of the aggregate total consideration for the Company's other acquisitions to the estimated fair values of the tangible and identifiable intangible assets acquired and liabilities and noncontrolling interests assumed (in thousands):
| Year ended October 31,
| 2018 |  | 2017 |  | 2016
Assets acquired: |  |  |  |  |
Goodwill |  | $38,320 |  |  |  | $49,932 |  |  |  | $6,876 |
Customer relationships | 11,620 |  |  | 29,500 |  |  | 2,800 |
Trade names | 760 |  |  | 16,750 |  |  | 300 |
Intellectual property | 6,970 |  |  | 1,950 |  |  | 2,000 |
Inventories | 6,219 |  |  | 28,410 |  |  | 249 |
Accounts receivable | 1,488 |  |  | 15,165 |  |  | — |
Property, plant and equipment | 1,807 |  |  | 4,522 |  |  | — |
Other assets | 51 |  |  | 982 |  |  | — |
Total assets acquired, excluding cash | 67,235 |  |  | 147,211 |  |  | 12,225 |
Liabilities assumed: |  |  |  |  |
Accounts payable | 671 |  |  | 7,696 |  |  | — |
Accrued expenses | 1,522 |  |  | 6,054 |  |  | — |
Deferred income taxes | — |  |  | 5,432 |  |  | — |
Other liabilities | — |  |  | 1,434 |  |  | — |
Total liabilities assumed | 2,193 |  |  | 20,616 |  |  | — |
Noncontrolling interests in consolidated subsidiaries | 7,518 |  |  | 23,662 |  |  | — |
Net assets acquired, excluding cash |  | $57,524 |  |  |  | $102,933 |  |  |  | $12,225 |
Electronic Technologies Group [Member] | AAT [Member] |
Business Acquisition [Line Items] |
Schedule of Fair Value of Total Consideration [Table Text Block] | The following table summarizes the total consideration for the acquisition of AAT (in thousands):
Cash paid |  | $317,500 |
Less: cash acquired | (868 | )
Cash paid, net | 316,632 |
Contingent consideration | 13,797 |
Additional purchase consideration | 544 |
Total consideration |  | $330,973 |
Schedule of Purchase Price Allocation [Table Text Block] | The following table summarizes the allocation of the total consideration for the acquisition of AAT to the estimated fair values of the tangible and identifiable intangible assets acquired and liabilities assumed (in thousands):
Assets acquired: |
Goodwill |  | $157,901 |
Customer relationships | 100,000 |
Intellectual property | 39,000 |
Trade name | 20,000 |
Inventories | 8,306 |
Accounts receivable | 6,115 |
Property, plant and equipment | 1,893 |
Other assets | 208 |
Total assets acquired, excluding cash | 333,423 |
Liabilities assumed: |
Accounts payable | 1,299 |
Accrued expenses | 1,151 |
Total liabilities assumed | 2,450 |
Net assets acquired, excluding cash |  | $330,973 |
Schedule of Pro Forma Information [Table Text Block] | The following table presents unaudited pro forma financial information for fiscal 2017 and fiscal 2016 as if the acquisition of AAT had occurred as of November 1, 2015 (in thousands, except per share data):
| Year ended October 31,
| 2017 |  | 2016
Net sales |  | $1,582,653 |  |  |  | $1,428,336 |
Net income from consolidated operations |  | $220,419 |  |  |  | $185,070 |
Net income attributable to HEICO |  | $198,744 |  |  |  | $165,112 |
Net income per share attributable to HEICO shareholders: |  |  |
Basic |  | $1.51 |  |  |  | $1.26 |
Diluted |  | $1.47 |  |  |  | $1.24 |
Electronic Technologies Group [Member] | Robertson [Member] |
Business Acquisition [Line Items] |
Schedule of Fair Value of Total Consideration [Table Text Block] | The following table summarizes the total consideration for the acquisition of Robertson (in thousands):
Cash paid |  | $256,293 |
Less: cash acquired | (3,271 | )
Total consideration |  | $253,022 |
Schedule of Purchase Price Allocation [Table Text Block] | The following table summarizes the allocation of the total consideration for the acquisition of Robertson to the estimated fair values of the tangible and identifiable intangible assets acquired and liabilities assumed (in thousands):
Assets acquired: |
Goodwill |  | $93,425 |
Customer relationships | 55,100 |
Intellectual property | 39,600 |
Trade name | 28,400 |
Inventories | 27,417 |
Property, plant and equipment | 7,476 |
Accounts receivable | 4,973 |
Other assets | 1,884 |
Total assets acquired, excluding cash | 258,275 |
Liabilities assumed: |
Accounts payable | 4,606 |
Accrued expenses | 647 |
Total liabilities assumed | 5,253 |
Net assets acquired, excluding cash |  | $253,022 |

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