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Fair Value Measurements - Summary of Fair Value Assets Measured on Nonrecurring Basis (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024
Nonrecurring basis [Abstract] |  |  |
Foreclosed real estate | $ 21 | $ 25 |
Nonrecurring Basis [Member] | Total Fair Value [Member] |  |  |
Nonrecurring basis [Abstract] |  |  |
Individually evaluated loans | 3,985 |  | $ 13,020
Foreclosed real estate | 0 |  | 0
Nonrecurring Basis [Member] | Level 3 [Member] |  |  |
Nonrecurring basis [Abstract] |  |  |
Individually evaluated loans | 3,985 |  | 13,020
Foreclosed real estate | $ 0 |  | $ 0

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- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents impaired loans as presented on the statement of financial position which may include mortgage loans, finance receivables, or any other impaired loans which are due to the Company as of the balance sheet date. + References No definition available. + Details
Name: | pbhc_ImpairedLoansFairValueDisclosure
Namespace Prefix: | pbhc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Nonrecurring basis [Abstract] + References No definition available. + Details
Name: | pbhc_NonrecurringBasisAbstract
Namespace Prefix: | pbhc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of expense recognized during the period for the foreclosure on real estate assets. + References No definition available. + Details
Name: | us-gaap_ForeclosedRealEstateExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsNonrecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_FairValueByMeasurementBasisAxis=us-gaap_EstimateOfFairValueFairValueDisclosureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |