v3.26.1
ACQUISITIONS (Details Textuals) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jul. 31, 2026
Jul. 31, 2025
Jul. 31, 2026
Jul. 31, 2025
Business Combination [Line Items]        
Revenues $ 1,413,050 $ 1,147,591 $ 3,967,345 $ 3,275,633
Business Combination, Pro Forma Information, Pro Forma Revenue $ 1,418,700 $ 1,233,100 $ 4,099,100 $ 3,520,700
HFSC | 80%-owned Subsidiary        
Business Combination [Line Items]        
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners 20.00%   20.00%  
Noncontrolling Interest, Ownership Percentage by Parent 80.00%   80.00%  
Rockmart | Heico Electronic Technologies Corp        
Business Combination [Line Items]        
Business Combination, Voting Equity Interest Acquired, Percentage 100.00%   100.00%  
Business Combination, Name of Acquiree     Axillon Aerospace’s Fuel Containment Business  
Business Combination, Description of Acquiree     renamed Rockmart Fuel Containment, LLC (“Rockmart”). Rockmart designs and manufactures advanced fuel containment solutions, primarily for military fixed- and rotary-wing aircraft.  
Ethos | HFSC        
Business Combination [Line Items]        
Business Combination, Voting Equity Interest Acquired, Percentage 100.00%   100.00%  
Business Combination, Name of Acquiree     EthosEnergy Accessories and Components, LLC and 100% of the stock of EthosEnergy Accessories and Components, Limited (collectively, “Ethos”)  
Business Combination, Description of Acquiree     Ethos provides repair solutions for engine components and accessories for various aeroderivative, aerospace, and defense engine platforms.  
Stock Issued During Period, Shares, Acquisitions     95,483  
Sherwood | HFSC        
Business Combination [Line Items]        
Business Combination, Voting Equity Interest Acquired, Percentage 80.00%   80.00%  
Business Combination, Name of Acquiree     Sherwood Avionics and Accessories, Inc.  
Business Combination, Description of Acquiree     Sherwood is an FAA and EASA Part 145 repair station specializing in the maintenance, repair and overhaul of complex, mission-critical mechanical and electro-mechanical components for defense and select commercial aviation platforms.  
Stock Issued During Period, Shares, Acquisitions     86,474  
Sherwood | HFSC | Existing Management        
Business Combination [Line Items]        
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners 20.00%   20.00%  
SWA        
Business Combination [Line Items]        
Business Combination, Voting Equity Interest Acquired, Percentage 90.00%   90.00%  
Business Combination, Name of Acquiree     Southwest Antennas, Inc.  
Business Combination, Description of Acquiree     SWA designs and manufactures high-performance rugged and mission-critical antennas primarily for ground-based defense and law enforcement applications.  
Business Combination, Contingent Consideration, Range of Outcomes, Maximum, Amount $ 2,700   $ 2,700  
SWA | Existing Management        
Business Combination [Line Items]        
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners 10.00%   10.00%  
FY 2026 Acquisitions        
Business Combination [Line Items]        
Revenues $ 83,900   $ 133,500  
FY 2026 Acquisitions | Customer Relationships [Member]        
Business Combination [Line Items]        
Intangible Asset, Finite-Lived, Useful Life 12 years   12 years  
FY 2026 Acquisitions | Intellectual Property [Member]        
Business Combination [Line Items]        
Intangible Asset, Finite-Lived, Useful Life 15 years   15 years  
Cook Defence Systems | 80%-owned Subsidiary        
Business Combination [Line Items]        
Business Combination, Voting Equity Interest Acquired, Percentage 100.00%   100.00%  
Business Combination, Name of Acquiree     Cook Defence Systems Limited  
Business Combination, Description of Acquiree     Cook Defence designs and manufactures track systems, mobility solutions, and armored steel components for military fighting vehicles.  
William Cook Stanhope | 80%-owned Subsidiary        
Business Combination [Line Items]        
Business Combination, Voting Equity Interest Acquired, Percentage 100.00%   100.00%  
Business Combination, Name of Acquiree     William Cook Stanhope Limited  
Business Combination, Description of Acquiree     Cook Defence designs and manufactures track systems, mobility solutions, and armored steel components for military fighting vehicles.  
William Cook Intermodal | 80%-owned Subsidiary        
Business Combination [Line Items]        
Business Combination, Voting Equity Interest Acquired, Percentage 100.00%   100.00%  
Business Combination, Name of Acquiree     William Cook Intermodal Limited  
Business Combination, Description of Acquiree     Cook Defence designs and manufactures track systems, mobility solutions, and armored steel components for military fighting vehicles.  
CalRamic        
Business Combination [Line Items]        
Business Combination, Voting Equity Interest Acquired, Percentage 90.00%   90.00%  
Business Combination, Name of Acquiree     CalRamic Technologies LLC  
Business Combination, Description of Acquiree     CalRamic designs and manufactures high-voltage ceramic capacitors for high-reliability applications, primarily serving the aerospace and defense markets, as well as select industrial niches.  
CalRamic | Existing Management        
Business Combination [Line Items]        
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners 10.00%   10.00%