Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2022	Aug. 09, 2022
Document and Entity Information
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Jun. 30, 2022
Entity 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	150 North Washington Avenue
Entity Address, City or Town	Scranton
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	18503
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 Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		7,170,660
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2
Entity Central Index Key	0001056943
Amendment Flag	false