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Other assets - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Other Assets [Abstract]
Unpaid principal balances of mortgage loans serviced for others	$ 169,450	$ 113,340

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- Definition

Unpaid Principal Balances Of Mortgage Loans Serviced For Others

+ References

No definition available.

+ Details

Name:	pfis_UnpaidPrincipalBalancesOfMortgageLoansServicedForOthers
Namespace Prefix:	pfis_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

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- Details

Name:	us-gaap_OtherAssetsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration