CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - UNAUDITED - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2025	Jan. 31, 2024
Operating Activities:
Net income from consolidated operations	$ 181,566	$ 125,482
Adjustments to reconcile net income from consolidated operations to net cash provided by (used in) operating activities:
Depreciation and amortization	46,225	43,505
Employer contributions to HEICO Savings and Investment Plan	5,473	5,665
Share-based compensation expense	4,671	4,881
Change in value of contingent consideration	3,288	1,095
Deferred income tax provision (benefit)	(7,052)	(3,759)
PaymentofContingentConsiderationinExcessofAcquisitionDateValue	(2,190)	(6,203)
Changes in operating assets and liabilities, net of acquisitions:
Change in accounts receivable	20,062	38,940
Increase (Decrease) in Contract with Customer, Asset	(5,949)	4,560
Change in inventories	(36,207)	(49,846)
Change in prepaid expenses and other current assets	(955)	(15,784)
Change in trade accounts payable	10,389	(11,609)
Change in accrued expenses and other current liabilities	(63,898)	(50,450)
Change in income taxes payable	16,887	12,345
Increase (Decrease) in Obligation, Other Postretirement Benefits	13,022	14,753
Other	17,702	(1,923)
Net cash provided by operating activities	203,034	111,652
Investing Activities:
Acquisitions, net of cash acquired	(254,763)	(46,208)
Capital expenditures	(17,335)	(13,377)
Net Investment Related to Deferred Compensation Plan	(14,600)	(12,710)
Other	(1,297)	1,156
Net cash used in investing activities	(287,995)	(71,139)
Financing Activities:
Proceeds from Long-term Lines of Credit	145,000	50,000
Payments on revolving credit facility	(20,000)	(15,000)
Cash dividends paid	(15,272)	(13,831)
Distributions to noncontrolling interests	(10,236)	(8,766)
Payment of Contingent Consideration	(5,954)	(13,797)
Payments for Repurchase of Redeemable Noncontrolling Interest	(3,258)	(2,212)
Repayments of Short-Term Debt		(13,924)
Common Stock Issued Repurchased and Retired Related To Stock Option Exercises	(95)	(601)
Proceeds from stock option exercises	1,597	2,254
Other	(1,070)	(852)
Net cash (used in) provided by financing activities	90,712	(16,729)
Effect of exchange rate changes on cash	(2,387)	1,491
Net (decrease) increase in cash and cash equivalents	3,364	25,275
Cash and cash equivalents at beginning of year	162,103	171,048
Cash and cash equivalents at end of period	$ 165,467	$ 196,323