Summary of significant accounting policies - Nonperforming assets and Allowance for loan losses (Details)	12 Months Ended
Dec. 31, 2023
Summary of significant accounting policies
Non performing loans past due period for Non-accrual status	90 days
Minimum contractual terms of a loan	6 months

The number of days past due for nonperforming loans which include nonaccrual loans and troubled debt restructured loans.

No definition available.

Name:	pfis_FinanceReceivablePastDuePeriodForNonaccrualStatus
Namespace Prefix:	pfis_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration