ACQUISITIONS	9 Months Ended
Jul. 31, 2017
Business Combinations [Abstract]
Acquisitions [Text Block]	ACQUISITIONS On April 24, 2017, the Company, through a subsidiary of HEICO Flight Support Corp., acquired 80.1% of the equity interests of LLP Enterprises, LLC, which owns all of the outstanding equity interests of the operating units of Air Cost Control ("A2C"). A2C is a leading aviation electrical interconnect product distributor of items such as connectors, wire, cable, protection and fastening systems, in addition to distributing a wide range of electromechanical parts. The remaining 19.9% interest continues to be owned by certain members of A2C's management team (see Note 3, Selected Financial Statement Information, for additional information). The purchase price of A2C was paid in cash principally using proceeds from the Company’s revolving credit facility. In June 2017, the Company, through a subsidiary of the HEICO Flight Support Corp., acquired all of the ownership interests of Carbon by Design ("CBD"). CBD is a manufacturer of composite components for UAVs, rockets, spacecraft and other specialized applications. The purchase price of CBD was paid using cash provided by operating activities. The total consideration for the fiscal 2017 acquisitions is not material or significant to the Company's condensed consolidated financial statements and the related allocation to the tangible and identifiable intangible assets acquired and liabilities and noncontrolling interests assumed is preliminary until the Company obtains final information regarding their fair values. The operating results of the fiscal 2017 acquisitions were included in the Company’s results of operations from each of the effective acquisition dates. The Company's consolidated net sales for the nine and three months ended July 31, 2017 include approximately $24.6 million and $23.1 million, respectively, from the fiscal 2017 acquisitions. The amount of earnings of the fiscal 2017 acquisitions included in the Company's Condensed Consolidated Statements of Operations for the nine and three months ended July 31, 2017 is not material. Had the fiscal 2017 acquisitions occurred as of November 1, 2015, net sales on a pro forma basis for the nine and three months ended July 31, 2017 would not have been materially different than the reported amounts and net sales on a pro forma basis for the nine and three months ended July 31, 2016 would have been $1,076.8 million and $378.6 million respectively. Net income from consolidated operations, net income attributable to HEICO and basic and diluted net income per share attributable to HEICO shareholders on a pro forma basis for the nine and three months ended July 31, 2017 and 2016 would not have been materially different than the reported amounts. The pro forma financial information is presented for comparative purposes only and is not necessarily indicative of the results of operations that actually would have been achieved if the acquisitions had taken place as of November 1, 2015.

ACQUISITIONS

On April 24, 2017, the Company, through a subsidiary of HEICO Flight Support Corp., acquired 80.1% of the equity interests of LLP Enterprises, LLC, which owns all of the outstanding equity interests of the operating units of Air Cost Control ("A2C"). A2C is a leading aviation electrical interconnect product distributor of items such as connectors, wire, cable, protection and fastening systems, in addition to distributing a wide range of electromechanical parts. The remaining 19.9% interest continues to be owned by certain members of A2C's management team (see Note 3, Selected Financial Statement Information, for additional information). The purchase price of A2C was paid in cash principally using proceeds from the Company’s revolving credit facility.

In June 2017, the Company, through a subsidiary of the HEICO Flight Support Corp., acquired all of the ownership interests of Carbon by Design ("CBD"). CBD is a manufacturer of composite components for UAVs, rockets, spacecraft and other specialized applications. The purchase price of CBD was paid using cash provided by operating activities.

The total consideration for the fiscal 2017 acquisitions is not material or significant to the Company's condensed consolidated financial statements and the related allocation to the tangible and identifiable intangible assets acquired and liabilities and noncontrolling interests assumed is preliminary until the Company obtains final information regarding their fair values. The operating results of the fiscal 2017 acquisitions were included in the Company’s results of operations from each of the effective acquisition dates. The Company's consolidated net sales for the nine and three months ended July 31, 2017 include approximately $24.6 million and $23.1 million, respectively, from the fiscal 2017 acquisitions. The amount of earnings of the fiscal 2017 acquisitions included in the Company's Condensed Consolidated Statements of Operations for the nine and three months ended July 31, 2017 is not material.

Had the fiscal 2017 acquisitions occurred as of November 1, 2015, net sales on a pro forma basis for the nine and three months ended July 31, 2017 would not have been materially different than the reported amounts and net sales on a pro forma basis for the nine and three months ended July 31, 2016 would have been $1,076.8 million and $378.6 million respectively. Net income from consolidated operations, net income attributable to HEICO and basic and diluted net income per share attributable to HEICO shareholders on a pro forma basis for the nine and three months ended July 31, 2017 and 2016 would not have been materially different than the reported amounts. The pro forma financial information is presented for comparative purposes only and is not necessarily indicative of the results of operations that actually would have been achieved if the acquisitions had taken place as of November 1, 2015.