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

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.

No definition available.

Name:	pbhc_ImpairedLoansFairValueDisclosure
Namespace Prefix:	pbhc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant