FAIR VALUE MEASUREMENTS FAIR VALUE MEASUREMENTS (Level 3 Valuation Inputs) (Details) - Fair Value, Inputs, Level 3 [Member]
$ in Thousands

Jul. 31, 2025

USD ($)

Oct. 31, 2024

USD ($)

Fair Value Measurement Inputs and Valuation Techniques [Line Items]

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value

$ 42,252

$ 30,207

FY2025 Acquisition Subsidiary 1

Fair Value Measurement Inputs and Valuation Techniques [Line Items]

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value

12,075

FY2022 Acquisition Subsidiary 2

Fair Value Measurement Inputs and Valuation Techniques [Line Items]

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value

21,534

FY2022 Acquisition Subsidiary 1

Fair Value Measurement Inputs and Valuation Techniques [Line Items]

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value

$ 8,643

Measurement Input, Long-term Revenue Growth Rate [Member] | FY2025 Acquisition Subsidiary 1

Fair Value Measurement Inputs and Valuation Techniques [Line Items]

Business Combination, Contingent Consideration, Liability, Measurement Input

^[1]

0.17

Measurement Input, Long-term Revenue Growth Rate [Member] | FY2025 Acquisition Subsidiary 1 | Minimum [Member]

Fair Value Measurement Inputs and Valuation Techniques [Line Items]

Business Combination, Contingent Consideration, Liability, Measurement Input

0.05

Measurement Input, Long-term Revenue Growth Rate [Member] | FY2025 Acquisition Subsidiary 1 | Maximum [Member]

Fair Value Measurement Inputs and Valuation Techniques [Line Items]

Business Combination, Contingent Consideration, Liability, Measurement Input

0.22

Measurement Input, Long-term Revenue Growth Rate [Member] | FY2022 Acquisition Subsidiary 2

Fair Value Measurement Inputs and Valuation Techniques [Line Items]

Business Combination, Contingent Consideration, Liability, Measurement Input

^[1]

0.07

Measurement Input, Long-term Revenue Growth Rate [Member] | FY2022 Acquisition Subsidiary 2 | Minimum [Member]

Fair Value Measurement Inputs and Valuation Techniques [Line Items]

Business Combination, Contingent Consideration, Liability, Measurement Input

0.03

Measurement Input, Long-term Revenue Growth Rate [Member] | FY2022 Acquisition Subsidiary 2 | Maximum [Member]

Fair Value Measurement Inputs and Valuation Techniques [Line Items]

Business Combination, Contingent Consideration, Liability, Measurement Input

0.09

Measurement Input, Long-term Revenue Growth Rate [Member] | FY2022 Acquisition Subsidiary 1

Fair Value Measurement Inputs and Valuation Techniques [Line Items]

Business Combination, Contingent Consideration, Liability, Measurement Input

^[1]

0.03

Measurement Input, Long-term Revenue Growth Rate [Member] | FY2022 Acquisition Subsidiary 1 | Minimum [Member]

Fair Value Measurement Inputs and Valuation Techniques [Line Items]

Business Combination, Contingent Consideration, Liability, Measurement Input

(0.02)

Measurement Input, Long-term Revenue Growth Rate [Member] | FY2022 Acquisition Subsidiary 1 | Maximum [Member]

Fair Value Measurement Inputs and Valuation Techniques [Line Items]

Business Combination, Contingent Consideration, Liability, Measurement Input

0.06

Measurement Input, Discount Rate [Member] | FY2025 Acquisition Subsidiary 1

Fair Value Measurement Inputs and Valuation Techniques [Line Items]

Business Combination, Contingent Consideration, Liability, Measurement Input

^[1]

0.072

Measurement Input, Discount Rate [Member] | FY2025 Acquisition Subsidiary 1 | Minimum [Member]

Fair Value Measurement Inputs and Valuation Techniques [Line Items]

Business Combination, Contingent Consideration, Liability, Measurement Input

0.072

Measurement Input, Discount Rate [Member] | FY2025 Acquisition Subsidiary 1 | Maximum [Member]

Fair Value Measurement Inputs and Valuation Techniques [Line Items]

Business Combination, Contingent Consideration, Liability, Measurement Input

0.072

Measurement Input, Discount Rate [Member] | FY2022 Acquisition Subsidiary 2

Fair Value Measurement Inputs and Valuation Techniques [Line Items]

Business Combination, Contingent Consideration, Liability, Measurement Input

^[1]

0.077

Measurement Input, Discount Rate [Member] | FY2022 Acquisition Subsidiary 2 | Minimum [Member]

Fair Value Measurement Inputs and Valuation Techniques [Line Items]

Business Combination, Contingent Consideration, Liability, Measurement Input

0.077

Measurement Input, Discount Rate [Member] | FY2022 Acquisition Subsidiary 2 | Maximum [Member]

Fair Value Measurement Inputs and Valuation Techniques [Line Items]

Business Combination, Contingent Consideration, Liability, Measurement Input

0.077

Measurement Input, Discount Rate [Member] | FY2022 Acquisition Subsidiary 1

Fair Value Measurement Inputs and Valuation Techniques [Line Items]

Business Combination, Contingent Consideration, Liability, Measurement Input

^[1]

0.078

Measurement Input, Discount Rate [Member] | FY2022 Acquisition Subsidiary 1 | Minimum [Member]

Fair Value Measurement Inputs and Valuation Techniques [Line Items]

Business Combination, Contingent Consideration, Liability, Measurement Input

0.078

Measurement Input, Discount Rate [Member] | FY2022 Acquisition Subsidiary 1 | Maximum [Member]

Fair Value Measurement Inputs and Valuation Techniques [Line Items]

Business Combination, Contingent Consideration, Liability, Measurement Input

0.078

[1]	Unobservable inputs were weighted by the relative fair value of the contingent consideration liability.

HEICO CORP 10-Q