XML 11 R1.htm IDEA: XBRL DOCUMENT v3.25.3
Cover - shares
 9 Months Ended
Sep. 30, 2025
Nov. 01, 2025
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Transition Report false  
Entity Interactive Data Current Yes  
Amendment Flag false  
Document Period End Date Sep. 30, 2025  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q3  
Entity Information [Line Items]    
Entity Registrant Name CITIZENS FINANCIAL SERVICES, INC.  
Entity Central Index Key 0000739421  
Entity File Number 0-13222  
Entity Tax Identification Number 23-2265045  
Entity Incorporation, State or Country Code PA  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status Yes  
Entity Shell Company false  
Entity Filer Category Accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Contact Personnel [Line Items]    
Entity Address, Address Line One 15 South Main Street  
Entity Address, City or Town Mansfield  
Entity Address, State or Province PA  
Entity Address, Postal Zip Code 16933  
Entity Phone Fax Numbers [Line Items]    
City Area Code 570  
Local Phone Number 662-2121  
Entity Listings [Line Items]    
Title of 12(b) Security Common Stock, Par value $1.00 per share  
Trading Symbol CZFS  
Security Exchange Name NASDAQ  
Entity Common Stock, Shares Outstanding   4,806,377