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Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2024
Feb. 28, 2025
Jun. 30, 2024
Document and Entity Information      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2024    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2024    
Document Transition Report false    
Securities Act File Number 001-36388    
Entity Registrant Name Peoples Financial Services Corp.    
Entity Incorporation, State or Country Code PA    
Entity Tax Identification Number 23-2391852    
Entity Address, Address Line One 102 East Drinker Street    
Entity Address, City or Town Dunmore    
Entity Address, State or Province PA    
Entity Address, Postal Zip Code 18512    
City Area Code 570    
Local Phone Number 346-7741    
Title of 12(b) Security Common stock, $2.00 par value    
Trading Symbol PFIS    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 321,388,000
Entity Common Stock, Shares Outstanding   9,993,803  
Auditor Name Baker Tilly US, LLP    
Auditor Location Allentown, Pennsylvania    
Auditor Firm ID 23    
Entity Central Index Key 0001056943    
Document Fiscal Period Focus FY    
Amendment Flag false