COMMITMENTS AND CONTINGENCIES (Details Textuals) (USD $)	3 Months Ended	6 Months Ended
Apr. 30, 2015	Apr. 30, 2014	Apr. 30, 2015	Apr. 30, 2014
Commitments and Contingencies Disclosure [Abstract]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 2,300,000		$ 2,300,000
Standby letter of credit to meet the security requirement of its insurance company for potential workers'compensation claims			1,500,000hei_StandbyLetterOfCredit
New product research and development expenses	$ 10,137,000us-gaap_ResearchAndDevelopmentExpense	$ 9,300,000us-gaap_ResearchAndDevelopmentExpense	$ 19,439,000us-gaap_ResearchAndDevelopmentExpense	$ 18,416,000us-gaap_ResearchAndDevelopmentExpense

- Definition

The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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