CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - UNAUDITED - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2024	Jan. 31, 2023
Operating Activities:
Net income from consolidated operations	$ 125,482	$ 103,005
Adjustments to reconcile net income from consolidated operations to net cash provided by (used in) operating activities:
Depreciation and amortization	43,505	27,060
Employer contributions to HEICO Savings and Investment Plan	5,665	3,814
Share-based compensation expense	4,881	2,812
Change in value of contingent consideration	1,095	1,336
Deferred income tax provision (benefit)	(3,759)	980
PaymentofContingentConsiderationinExcessofAcquisitionDateValue	(6,203)	(6,299)
Changes in operating assets and liabilities, net of acquisitions:
Change in accounts receivable	38,940	(7,095)
Increase (Decrease) in Contract with Customer, Asset	4,560	(7,303)
Change in inventories	(49,846)	(52,041)
Change in prepaid expenses and other current assets	(15,784)	(860)
Change in trade accounts payable	(11,609)	(1,992)
Change in accrued expenses and other current liabilities	(50,450)	(7,583)
Change in income taxes payable	12,345	13,839
Increase (Decrease) in Obligation, Other Postretirement Benefits	14,753	8,892
Other	(1,923)	(1,879)
Net cash provided by operating activities	111,652	76,686
Investing Activities:
Acquisitions, net of cash acquired	(46,208)	(503,736)
Capital expenditures	(13,377)	(10,846)
Net Investment Related to Deferred Compensation Plan	(12,710)	(11,800)
Other	1,156	402
Net cash used in investing activities	(71,139)	(525,980)
Financing Activities:
Proceeds from Long-term Lines of Credit	50,000	531,000
Payments on revolving credit facility	(15,000)	(38,000)
Repayments of Short-Term Debt	(13,924)	0
Cash dividends paid	(13,831)	(13,668)
Payment of Contingent Consideration	(13,797)	(3,710)
Distributions to noncontrolling interests	(8,766)	(11,291)
Payments for Repurchase of Redeemable Noncontrolling Interest	(2,212)	(2,733)
Common Stock Issued Repurchased and Retired Related To Stock Option Exercises	(601)	(14,805)
Proceeds from stock option exercises	2,254	2,845
Other	(852)	(463)
Net cash (used in) provided by financing activities	(16,729)	449,175
Effect of exchange rate changes on cash	1,491	3,234
Net (decrease) increase in cash and cash equivalents	25,275	3,115
Cash and cash equivalents at beginning of year	171,048	139,504
Cash and cash equivalents at end of period	$ 196,323	$ 142,619