CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - UNAUDITED - USD ($) $ in Thousands	9 Months Ended
	Jul. 31, 2025	Jul. 31, 2024
Operating Activities:
Net income from consolidated operations	$ 542,769	$ 408,200
Adjustments to reconcile net income from consolidated operations to net cash provided by (used in) operating activities:
Depreciation and amortization	144,869	130,646
Share-based compensation expense	18,346	14,088
Employer contributions to HEICO Savings and Investment Plan	14,186	13,677
Change in value of contingent consideration	8,974	(10,892)
Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill)	0	6,000
Deferred income tax provision (benefit)	(28,789)	(15,227)
Payment for Contingent Consideration Liability, Operating Activities	(2,190)	(6,203)
Changes in operating assets and liabilities, net of acquisitions:
Change in accounts receivable	(36,063)	(15,334)
Change in contract assets	(20,305)	9,009
Change in inventories	(60,157)	(102,183)
Change in prepaid expenses and other current assets	14,874	(14,821)
Change in trade accounts payable	28,919	995
Change in accrued expenses and other current liabilities	11,903	(1,113)
Change in income taxes payable	(27,675)	(9,534)
Change in other long-term liabilities and assets related to HEICO Leadership Compensation Plan	23,042	19,550
Other	6,237	39,889
Net cash provided by operating activities	638,940	466,747
Investing Activities:
Acquisitions, net of cash acquired	(629,928)	(55,208)
Capital expenditures	(46,038)	(42,175)
Net Investment Related to Deferred Compensation Plan	(21,689)	(16,510)
Other	(39)	1,743
Net cash used in investing activities	(697,694)	(112,150)
Financing Activities:
Borrowings on revolving credit facility	495,000	50,000
Payments on revolving credit facility	(275,000)	(255,000)
Distributions to noncontrolling interests	(27,248)	(23,302)
Cash dividends paid	(31,968)	(29,069)
Payment for Contingent Consideration Liability, Financing Activities	(5,954)	(24,797)
Payments to Noncontrolling Interests	(5,773)	(26,567)
Common Stock Issued Repurchased and Retired Related To Stock Option Exercises	(1,979)	(4,836)
Repayments of Short-Term Debt	0	(13,924)
Proceeds from stock option exercises	11,680	6,387
Other	(3,509)	(2,939)
Net cash (used in) provided by financing activities	155,249	(324,047)
Effect of exchange rate changes on cash	3,290	1,342
Net (decrease) increase in cash and cash equivalents	99,785	31,892
Cash and cash equivalents at beginning of year	162,103	171,048
Cash and cash equivalents at end of period	$ 261,888	$ 202,940