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Investment Securities - Gross Realized Gains (Losses) on Sale and Redemptions of Securities (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022
Gain (Loss) on Sale of Investments [Abstract] |  |
Realized gains on investments | $ 2,021 | $ 0
Realized losses on investments | (1,948) | (6)
Total | $ 73 | $ (6)

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- Definition Gain loss on sale of investments excluding realized gain on marketable equity security. + References No definition available. + Details
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Period Type: | duration

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- Definition The net realized gain on investments sold during the period, not including gains (losses) on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, which, for cash flow reporting, is a component of proceeds from investing activities. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition The net realized loss on investments sold during the period, not including gains (losses) on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, which, for cash flow reporting, is a component of proceeds from investing activities. + References No definition available. + Details
Name: | pbhc_RealizedLossesOnSaleOfInvestments
Namespace Prefix: | pbhc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Period Type: | duration