FAIR VALUE MEASUREMENTS (Details Textuals) $ in Thousands, $ in Thousands	9 Months Ended
	Jul. 31, 2022 USD ($)	Jul. 31, 2022 CAD ($)	May 31, 2022	Oct. 31, 2021 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total liabilities	$ 80,632			$ 62,286
Accrued Liabilities, Current	$ 233,812			206,857
Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Selling, General and Administrative Expense
FY2022 Acquisition Subsidiary 1 | Flight Support Group [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	96.00%	96.00%
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	$ 27,400
Total liabilities	$ 13,100
FY2021 Acquisition Subsidiary 1 | Flight Support Group [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	89.00%	89.00%
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low	$ 8,900
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	17,800
Total liabilities	$ 17,400
FY2020 Acquisition Subsidiary 1 | Heico Electronic Technologies Corp
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	89.99%	89.99%
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	$ 21,100
Total liabilities	14,400
Accrued Liabilities, Current	10,400
FY2020 Acquisition Subsidiary 1 | Heico Electronic Technologies Corp | Canada, Dollars
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low		$ 13,500
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High		27,000
Total liabilities		$ 18,500
FY2020 Acquisition Subsidiary 2 | Heico Electronic Technologies Corp
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	35,000
Total liabilities	$ 7,400			13,300
FY2020 Acquisition Subsidiary 2 | Heico Electronic Technologies Corp | FY2020 Acquisition Subsidiary 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent	75.00%	75.00%
FY 2017 Acquisition [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired			9.95%
FY 2017 Acquisition [Member] | Heico Electronic Technologies Corp
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	$ 20,000
Total liabilities	$ 18,600
FY2022 Acquisition Subsidiary 2 | Flight Support Group [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	74.00%	74.00%
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	$ 14,100
Total liabilities	9,700
Aggregate LCP Liability [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Related liabilities of deferred compensation plans, specified as other long-term liabilities	$ 218,200			$ 244,300