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Cover
Jun. 30, 2022
Mar. 26, 2022
Cover [Abstract]    
Document Type 8-K  
Document Period End Date Jun. 30, 2022 Jun. 30, 2022
Entity Registrant Name Home Bancorp, Inc.  
Entity Incorporation, State or Country Code LA  
Entity File Number 001-34190  
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  
Written Communications false  
Soliciting Material false  
Pre-commencement Tender Offer false  
Pre-commencement Issuer Tender Offer false  
Title of 12(b) Security Common Stock  
Trading Symbol HBCP  
Security Exchange Name NASDAQ  
Entity Emerging Growth Company false  
Entity Central Index Key 0001436425  
Amendment Flag false