{"cik":2114521,"taxonomy":"us-gaap","tag":"Assets","label":"Assets","description":"Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.","entityName":"CSB Financial Inc.","units":{"USD":[{"end":"2025-12-31","val":110202483,"accn":"0001104659-26-078754","fy":2026,"fp":"Q1","form":"10-Q","filed":"2026-06-29","frame":"CY2025Q4I"},{"end":"2026-03-31","val":111074141,"accn":"0001104659-26-078754","fy":2026,"fp":"Q1","form":"10-Q","filed":"2026-06-29","frame":"CY2026Q1I"}]}}