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Summary of significant accounting policies - Loans, net (Details)	12 Months Ended
	Dec. 31, 2024
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable
Maximum loan to value percentage	80.00%
Residential Mortgage | Maximum
Accounts, Notes, Loans and Financing Receivable
Maximum amortization period	30 years

X

- Definition

The maximum loan to value percentage.

+ References

No definition available.

+ Details

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Namespace Prefix:	pfis_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The maximum amortization period of a loan.

+ References

No definition available.

+ Details

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Namespace Prefix:	pfis_
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Balance Type:	na
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 20
-Name Accounting Standards Codification
-Section 40
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481628/310-20-40-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-2

+ Details

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- Details

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- Details

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Balance Type:
Period Type:

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- Details

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