v3.26.3
Document And Entity Information
Oct. 23, 2026
Document Information Line Items  
Entity Central Index Key 0001085913
Document Type 8-K
Document Period End Date Oct. 21, 2026
Entity Registrant Name Farmers & Merchants Bancorp
Entity Incorporation, State or Country Code DE
Entity File Number 000-26099
Entity Tax Identification Number 94-3327828
Entity Address, Address Line One 111 West Pine Street
Entity Address, City or Town Lodi
Entity Address, State or Province CA
Entity Address, Postal Zip Code 95240
City Area Code 209
Local Phone Number 367-2300
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Amendment Flag false