{"cik":2013639,"taxonomy":"us-gaap","tag":"ShareBasedCompensation","label":"Share-based Payment Arrangement, Noncash Expense","description":"Amount of noncash expense for share-based payment arrangement.","entityName":"FB Bancorp, Inc.","units":{"USD":[{"start":"2025-01-01","end":"2025-12-31","val":45000,"accn":"0001193125-26-126081","fy":2025,"fp":"FY","form":"10-K","filed":"2026-03-26","frame":"CY2025"},{"start":"2026-01-01","end":"2026-03-31","val":301000,"accn":"0001193125-26-223273","fy":2026,"fp":"Q1","form":"10-Q","filed":"2026-05-14","frame":"CY2026Q1"}]}}