v3.25.4
Cover - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Mar. 04, 2026
Jun. 30, 2025
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2025    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-34190    
Entity Registrant Name HOME BANCORP, INC.    
Entity Incorporation, State or Country Code LA    
Entity Tax Identification Number 71-1051785    
Entity Address, Address Line One 503 Kaliste Saloom Road    
Entity Address, City or Town Lafayette    
Entity Address, State or Province LA    
Entity Address, Postal Zip Code 70508    
City Area Code 337    
Local Phone Number 237-1960    
Title of 12(b) Security Common Stock, $0.01 par value per share    
Trading Symbol HBCP    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Accelerated Filer    
Entity Small Business Company 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     $ 375.2
Entity Common Stock, Shares Outstanding   7,836,346  
Documents Incorporated by Reference
Set forth below are the documents incorporated by reference and the part of the Form 10-K into which the document is incorporated:
Portions of the definitive Proxy Statement for the 2026 Annual Meeting of Shareholders are incorporated by reference into Part III, Items 10-14 of this Form 10-K.
    
Amendment Flag false    
Document Fiscal Year Focus 2025    
Document Fiscal Period Focus FY    
Entity Central Index Key 0001436425