Investment Securities - Amortized Cost and Estimated Fair Value of Investment Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Schedule of Available-for-sale Securities and Held-to-Maturity Securities [Line Items]
Totals, amortized cost	$ 214,362	$ 189,813
Gross Unrealized Gains, Debt investment securities	888	2,434
Gross Unrealized Losses, Debt investment securities	(12,289)	(1,855)
Available-for-sale Securities, Debt investment securities	202,961	190,392
Amortized cost, equity securities	206	206
Gross Unrealized Gains, Equity investment securities	0	0
Gross Unrealized Losses, Equity investment securities	0	0
Available-for-sale Securities, Equity investment securities	206	206
Total investment securities, amortized cost basis	214,568	190,019
Gross Unrealized Gains	888	2,434
Gross Unrealized Losses	(12,289)	(1,855)
Estimated Fair Value	203,167	190,598
Held-to-maturity securities, debt maturities, Amortized Cost	181,532	160,923
Held to maturity, gross unrealized gains	89	2,601
Held to maturity, gross unrealized losses	(7,063)	(719)
Held-to-maturity Securities, Debt Maturities, Fair Value	174,558	162,805
US Treasury, Agencies and GSEs [Member]
Schedule of Available-for-sale Securities and Held-to-Maturity Securities [Line Items]
Totals, amortized cost	36,827	32,669
Gross Unrealized Gains, Debt investment securities	40	17
Gross Unrealized Losses, Debt investment securities	(2,618)	(413)
Available-for-sale Securities, Debt investment securities	34,249	32,273
Held-to-maturity securities, debt maturities, Amortized Cost	3,872	0
Held to maturity, gross unrealized gains	0	0
Held to maturity, gross unrealized losses	(87)	0
Held-to-maturity Securities, Debt Maturities, Fair Value	3,785	0
State and Political Subdivisions [Member]
Schedule of Available-for-sale Securities and Held-to-Maturity Securities [Line Items]
Totals, amortized cost	47,559	37,860
Gross Unrealized Gains, Debt investment securities	77	1,383
Gross Unrealized Losses, Debt investment securities	(3,315)	(44)
Available-for-sale Securities, Debt investment securities	44,321	39,199
Held-to-maturity securities, debt maturities, Amortized Cost	15,240	14,790
Held to maturity, gross unrealized gains	1	416
Held to maturity, gross unrealized losses	(1,720)	(140)
Held-to-maturity Securities, Debt Maturities, Fair Value	13,521	15,066
Corporate [Member]
Schedule of Available-for-sale Securities and Held-to-Maturity Securities [Line Items]
Totals, amortized cost	14,604	13,603
Gross Unrealized Gains, Debt investment securities	752	562
Gross Unrealized Losses, Debt investment securities	(447)	(38)
Available-for-sale Securities, Debt investment securities	14,909	14,127
Held-to-maturity securities, debt maturities, Amortized Cost	48,048	46,290
Held to maturity, gross unrealized gains	38	1,252
Held to maturity, gross unrealized losses	(1,159)	(102)
Held-to-maturity Securities, Debt Maturities, Fair Value	46,927	47,440
Asset Backed Securities [Member]
Schedule of Available-for-sale Securities and Held-to-Maturity Securities [Line Items]
Totals, amortized cost	17,172	13,693
Gross Unrealized Gains, Debt investment securities	0	9
Gross Unrealized Losses, Debt investment securities	(645)	(89)
Available-for-sale Securities, Debt investment securities	16,527	13,613
Held-to-maturity securities, debt maturities, Amortized Cost	15,257	14,636
Held to maturity, gross unrealized gains	21	67
Held to maturity, gross unrealized losses	(620)	(188)
Held-to-maturity Securities, Debt Maturities, Fair Value	14,658	14,515
Residential Mortgage-Backed - US Agency [Member]
Schedule of Available-for-sale Securities and Held-to-Maturity Securities [Line Items]
Totals, amortized cost	21,667	22,482
Gross Unrealized Gains, Debt investment securities	19	148
Gross Unrealized Losses, Debt investment securities	(1,278)	(466)
Available-for-sale Securities, Debt investment securities	20,408	22,164
Held-to-maturity securities, debt maturities, Amortized Cost	7,764	9,740
Held to maturity, gross unrealized gains	17	277
Held to maturity, gross unrealized losses	(417)	(18)
Held-to-maturity Securities, Debt Maturities, Fair Value	7,364	9,999
Collateralized Mortgage Obligations - US Agency [Member]
Schedule of Available-for-sale Securities and Held-to-Maturity Securities [Line Items]
Totals, amortized cost	10,314	12,658
Gross Unrealized Gains, Debt investment securities	0	30
Gross Unrealized Losses, Debt investment securities	(914)	(403)
Available-for-sale Securities, Debt investment securities	9,400	12,285
Held-to-maturity securities, debt maturities, Amortized Cost	15,775	11,362
Held to maturity, gross unrealized gains	5	367
Held to maturity, gross unrealized losses	(648)	(9)
Held-to-maturity Securities, Debt Maturities, Fair Value	15,132	11,720
Collateralized Mortgage Obligations - Private Label [Member]
Schedule of Available-for-sale Securities and Held-to-Maturity Securities [Line Items]
Totals, amortized cost	66,219	56,848
Gross Unrealized Gains, Debt investment securities	0	285
Gross Unrealized Losses, Debt investment securities	(3,072)	(402)
Available-for-sale Securities, Debt investment securities	63,147	56,731
Held-to-maturity securities, debt maturities, Amortized Cost	75,576	64,105
Held to maturity, gross unrealized gains	7	222
Held to maturity, gross unrealized losses	(2,412)	(262)
Held-to-maturity Securities, Debt Maturities, Fair Value	73,171	64,065
Mutual funds Common Stock Financial Services Industry [Member]
Schedule of Available-for-sale Securities and Held-to-Maturity Securities [Line Items]
Amortized cost, equity securities	206	206
Gross Unrealized Gains, Equity investment securities	0	0
Gross Unrealized Losses, Equity investment securities	0	0
Available-for-sale Securities, Equity investment securities	$ 206	$ 206

Available for sale debt and equity securities.

No definition available.

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

- Definition

Available for sale debt and equity securities accumulated gross unrealized gain before tax.

+ References

No definition available.

+ Details

Name:	pbhc_AvailableForSaleDebtAndEquitySecuritiesAccumulatedGrossUnrealizedGainBeforeTax
Namespace Prefix:	pbhc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Available for sale debt and equity securities accumulated gross unrealized loss before tax.

+ References

No definition available.

+ Details

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

- Definition

Available for sale debt and equity securities amortized cost.

+ References

No definition available.

+ Details

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

- Definition

Equity securities, available-for-sale, accumulated gross unrealized gain, before tax.

+ References

No definition available.

+ Details

Name:	pbhc_EquitySecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainBeforeTax
Namespace Prefix:	pbhc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Equity securities, available-for-sale, accumulated gross unrealized loss, before tax.

+ References

No definition available.

+ Details

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

- Definition

Schedule of available for sale securities and held to maturity securities.

+ References

No definition available.

+ Details

Name:	pbhc_ScheduleOfAvailableForSaleSecuritiesAndHeldToMaturitySecuritiesLineItems
Namespace Prefix:	pbhc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563

+ Details

Name:	us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563

+ Details

Name:	us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454

+ Details

Name:	us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(6))
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=124260329&loc=d3e26610-111562

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (aa)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesDebtSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(2))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (f)
-URI https://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 45
-Paragraph 1A
-URI https://asc.fasb.org/extlink&oid=123594786&loc=SL75136599-209740

+ Details

Name:	us-gaap_EquitySecuritiesFvNi
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Cost of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Excludes equity method investment and investment in equity security without readily determinable fair value.

+ References

No definition available.

+ Details

Name:	us-gaap_EquitySecuritiesFvNiCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 14
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919253-210447

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7A
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953401-111524

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27232-111563

+ Details

Name:	us-gaap_HeldToMaturitySecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of accumulated unrecognized gain on investment in debt security measured at amortized cost (held-to-maturity).

+ References

+ Details

Name:	us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity).

+ References

+ Details

Name:	us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Fair value of investment in debt security measured at amortized cost (held-to-maturity).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (aa)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27232-111563

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(6))
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5A
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=SL120269820-111563

+ Details

Name:	us-gaap_HeldToMaturitySecuritiesFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_USTreasuryAndGovernmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_AssetBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_ResidentialMortgageBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=pbhc_MutualFundsCommonStockFinancialServicesIndustryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: