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Investment Securities - Gross Realized Gains (Losses) on Sale and Redemptions of Securities (Details) - USD ($) $ in Thousands	3 Months Ended
	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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Namespace Prefix:	pbhc_
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Balance Type:	credit
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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Namespace Prefix:	pbhc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- 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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