Investment Securities - Gross Realized Gains (Losses) on Sale and Redemptions of Securities (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Gain (Loss) on Sale of Investments [Abstract]
Realized gains on investments	$ 0	$ 0	$ 750	$ 2,021
Realized losses on investments	(188)	(13)	(1,070)	(1,961)
Total	$ (188)	$ (13)	$ (320)	$ 60

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.

No definition available.

Name:	pbhc_RealizedLossesOnSaleOfInvestments
Namespace Prefix:	pbhc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration