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Basis of Presentation - Additional Information (Details)	Mar. 31, 2020
Nature of Operations [Line Items]
Consolidation of membership interest in Fitzgibbons	100.00%
FitzGibbons Agency LLC [Member] | Pathfinder Risk Management Company Inc [Member]
Nature of Operations [Line Items]
Membership interest own in Fitzgibbons through subsidiary	51.00%
Noncontrolling interest by subsidiary	49.00%

X

- Definition

Refers to percentage of consolidation of interest own in Fitzgibbons.

+ References

No definition available.

+ Details

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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

No definition available.

+ Details

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X

- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

No definition available.

+ Details

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- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

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X

- Details

Name:	srt_OwnershipAxis=pbhc_FitzGibbonsAgencyLLCMember
Namespace Prefix:
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Balance Type:
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X

- Details

Name:	dei_LegalEntityAxis=pbhc_PathfinderRiskManagementCompanyIncMember
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