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Pension and Postretirement Benefits - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2025 | Dec. 31, 2024
Retirement Benefits [Abstract] |  |
Minimum years of service to participate in the health and life insurance benefits as of January 1, 1995 | 14 years |
Prepaid pension asset | $ 8.1 | $ 7.9

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- Definition Minimum years of service to participate in health and life insurance benefits. + References No definition available. + Details
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- Definition Prepaid Pension Asset + References No definition available. + Details
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Namespace Prefix: | pbhc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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