Class of Stock [Domain] Class of Stock [Domain] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Entities [Table] Entities [Table] Class of Stock [Axis] Class of Stock [Axis] Document Information, Document [Axis] Document Information, Document [Axis] Security Exchange Name Security Exchange Name Document [Domain] Document [Domain] Entity Address, City or Town Entity Address, City or Town Soliciting Material Soliciting Material Cover [Abstract] Cover [Abstract] Legal Entity [Axis] Legal Entity [Axis] City Area Code City Area Code Entity Tax Identification Number Entity Tax Identification Number Amendment Flag Amendment Flag Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Pre-commencement Tender Offer Pre-commencement Tender Offer Entity Emerging Growth Company Entity Emerging Growth Company Heico Common Stock [Member] Heico Common Stock [Member] Heico Common Stock [Member] Entity Central Index Key Entity Central Index Key Entity File Number Entity File Number Entity Address, State or Province Entity Address, State or Province Common Class A [Member] Common Class A [Member] Pre-commencement Issuer Tender Offer Pre-commencement Issuer Tender Offer Entity Address, Address Line One Entity Address, Address Line One Document Information [Line Items] Document Information [Line Items] Document Information [Table] Document Information [Table] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Written Communications Written Communications Local Phone Number Local Phone Number Entity [Domain] Entity [Domain] Title of 12(b) Security Title of 12(b) Security Document Period End Date Document Period End Date Entity Information [Line Items] Entity Information [Line Items] Document Type Document Type