Description of Business	12 Months Ended
Dec. 31, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business	Description of Business Home Bancorp, Inc., a Louisiana corporation (the “Company”), is the parent holding company for Home Bank, N.A. (the "Bank"). The Bank is a national bank and wholly owned subsidiary of the Company. The Company and Bank are headquartered in Lafayette, Louisiana. As of December 31, 2025, the Company was a bank holding company. The Bank established HB Investment Fund I, LLC and HB Investment Fund II, LLC, as wholly-owned subsidiaries of the Bank to invest in New Markets Tax Credits (“NMTC”) and Federal Tax Credits ("FTC") in our market areas. HB Investment Fund I, LLC was dissolved in October 2025 due to the conclusion of the NMTC compliance period for this subsidiary. In 2010, the Bank expanded into the Northshore (of Lake Pontchartrain) region through a Federal Deposit Insurance Corporation (“FDIC”) assisted acquisition of certain assets and liabilities of the former Statewide Bank. In July 2011, the Bank expanded into the Greater New Orleans region through its acquisition of GS Financial Corporation, the former holding company of Guaranty Savings Bank. In February 2014, the Bank expanded into west Mississippi through its acquisition of Britton & Koontz Capital Corporation, the holding company for Britton & Koontz Bank, N.A. of Natchez, Mississippi. In September 2015, the Bank expanded its presence in the Greater New Orleans region through the acquisition of Louisiana Bancorp, Inc., the former holding company of Bank of New Orleans of Metairie, Louisiana. In December 2017, the Bank expanded its presence in the Acadiana market through the acquisition of St. Martin Bancshares (“SMB”), the former holding company of St. Martin Bank & Trust Company of St. Martinville, Louisiana. In March 2022, the Bank expanded into the Houston, Texas region through the acquisition of Friendswood Capital Corporation ("Friendswood"), the former holding company of Texan Bank, N.A. ("Texan Bank") of Houston, Texas. As of December 31, 2025, the Bank conducted business from 43 banking offices in the Acadiana, Northshore, Baton Rouge, Greater New Orleans, Natchez and Houston regions of south Louisiana, west Mississippi, and east Texas. The Bank is primarily engaged in attracting deposits from the general public and using those funds to invest in loans and investment securities. The Bank’s principal sources of funds are customer deposits, repayments of loans, repayments of investments and funds borrowed from outside sources such as the Federal Home Loan Bank (“FHLB”) of Dallas. The Bank derives its income principally from interest earned on loans and investment securities and, to a lesser extent, from fees received in connection with the origination of loans, service charges on deposit accounts and for other services. The Bank’s primary expenses are general operating expenses and interest expense on deposits and borrowings. Management considers all of our operations to be aggregated in one reportable operating segment. For additional information regarding segment reporting, see Note 2. Summary of Significant Accounting Policies. The Company’s primary banking regulator is the Board of Governors of the Federal Reserve System (the”Federal Reserve”). The Bank’s primary regulator is the Office of the Comptroller of the Currency (“OCC”). Its deposits are insured to the maximum amount permissible under federal law by the FDIC.

Home Bancorp, Inc., a Louisiana corporation (the “Company”), is the parent holding company for Home Bank, N.A. (the "Bank"). The Bank is a national bank and wholly owned subsidiary of the Company. The Company and Bank are headquartered in Lafayette, Louisiana. As of December 31, 2025, the Company was a bank holding company. The Bank established HB Investment Fund I, LLC and HB Investment Fund II, LLC, as wholly-owned subsidiaries of the Bank to invest in New Markets Tax Credits (“NMTC”) and Federal Tax Credits ("FTC") in our market areas. HB Investment Fund I, LLC was dissolved in October 2025 due to the conclusion of the NMTC compliance period for this subsidiary.

In 2010, the Bank expanded into the Northshore (of Lake Pontchartrain) region through a Federal Deposit Insurance Corporation (“FDIC”) assisted acquisition of certain assets and liabilities of the former Statewide Bank. In July 2011, the Bank expanded into the Greater New Orleans region through its acquisition of GS Financial Corporation, the former holding company of Guaranty Savings Bank. In February 2014, the Bank expanded into west Mississippi through its acquisition of Britton & Koontz Capital Corporation, the holding company for Britton & Koontz Bank, N.A. of Natchez, Mississippi. In September 2015, the Bank expanded its presence in the Greater New Orleans region through the acquisition of Louisiana Bancorp, Inc., the former holding company of Bank of New Orleans of Metairie, Louisiana. In December 2017, the Bank expanded its presence in the Acadiana market through the acquisition of St. Martin Bancshares (“SMB”), the former holding company of St. Martin Bank & Trust Company of St. Martinville, Louisiana. In March 2022, the Bank expanded into the Houston, Texas region through the acquisition of Friendswood Capital Corporation ("Friendswood"), the former holding company of Texan Bank, N.A. ("Texan Bank") of Houston, Texas. As of December 31, 2025, the Bank conducted business from 43 banking offices in the Acadiana, Northshore, Baton Rouge, Greater New Orleans, Natchez and Houston regions of south Louisiana, west Mississippi, and east Texas.

The Bank is primarily engaged in attracting deposits from the general public and using those funds to invest in loans and investment securities. The Bank’s principal sources of funds are customer deposits, repayments of loans, repayments of investments and funds borrowed from outside sources such as the Federal Home Loan Bank (“FHLB”) of Dallas. The Bank derives its income principally from interest earned on loans and investment securities and, to a lesser extent, from fees received in connection with the origination of loans, service charges on deposit accounts and for other services. The Bank’s primary expenses are general operating expenses and interest expense on deposits and borrowings. Management considers all of our operations to be aggregated in one reportable operating segment. For additional information regarding segment reporting, see Note 2. Summary of Significant Accounting Policies.

The Company’s primary banking regulator is the Board of Governors of the Federal Reserve System (the”Federal Reserve”). The Bank’s primary regulator is the Office of the Comptroller of the Currency (“OCC”). Its deposits are insured to the maximum amount permissible under federal law by the FDIC.