v3.26.1
Cover Page - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2026
May 18, 2026
Sep. 30, 2025
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Mar. 31, 2026    
Current Fiscal Year End Date --03-31    
Document Transition Report false    
Entity File Number 001-37537    
Entity Registrant Name Houlihan Lokey, Inc.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 95-2770395    
Entity Address, Address Line One 10250 Constellation Blvd.    
Entity Address, Address Line Two 5th Floor    
Entity Address, City or Town Los Angeles    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 90067    
City Area Code 310    
Local Phone Number 553-8871    
Title of 12(b) Security Class A Common Stock, par value $0.001    
Trading Symbol HLI    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 11,190
Documents Incorporated by Reference Portions of the Registrant’s definitive proxy statement for its 2026 annual meeting of stockholders, which the Registrant anticipates will be filed no later than 120 days after the end of its fiscal year, are incorporated by reference in Part III of this Form 10‑K.    
Amendment Flag false    
Entity Central Index Key 0001302215    
Document Fiscal Year Focus 2026    
Document Fiscal Period Focus FY    
Auditor Name KPMG LLP    
Auditor Location Los Angeles, California    
Auditor Firm ID 185    
Class A common stock      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   54,276,657  
Class B common stock      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   14,782,730