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v3.26.1

Deposits (Details) - USD ($) $ in Millions | Mar. 31, 2026 | Dec. 31, 2025
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Deposits |  |
Time deposits less than $250,000. | $ 112.1 | $ 152.3

X
- Definition Amount of time deposit liabilities, including certificates of deposit, in denominations of less than $250,000. + References No definition available. + Details
Name: | pfis_TimeDepositsLessThan250000
Namespace Prefix: | pfis_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_DepositsByTypeAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration