v3.26.3
Document And Entity Information
Oct. 16, 2026
Document Information [Line Items]  
Entity, Registrant Name FRANKLIN FINANCIAL SERVICES CORPORATION
Document, Type 8-K
Document, Period End Date Oct. 16, 2026
Entity, Incorporation, State or Country Code PA
Entity, File Number 001-38884
Entity, Tax Identification Number 25-1440803
Entity, Address, Address Line One 1500 Nitterhouse Drive
Entity, Address, City or Town Chambersburg
Entity, Address, State or Province PA
Entity, Address, Postal Zip Code 17201
City Area Code (717)
Local Phone Number 264-6116
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 FRAF
Security Exchange Name NASDAQ
Entity, Emerging Growth Company false
Amendment Flag false
Entity, Central Index Key 0000723646