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Note 10 - Contractual Amounts Represent Credit Risk (Details) $ in Thousands | Jun. 30, 2016 USD ($)
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Future Loan Commitments [Member] |
Commitments to extend credit | $ 15,186
Home Equity Lines of Credit [Member] |
Commitments to extend credit | 21,464
Unused Line of Credit [Member] |
Commitments to extend credit | 22,684
Undisbursed Construction Loans [Member] |
Commitments to extend credit | 20,204
Financial Standy Letter of Credit [Member] |
Commitments to extend credit | 1,262
Commitments to extend credit | $ 80,800

X
- Definition Commitments to extend credit. + References No definition available. + Details
Name: | pnbk_CommitmentsToExtendCredit
Namespace Prefix: | pnbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_CededCreditRiskAxis=pnbk_FutureLoanCommitmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CededCreditRiskAxis=pnbk_HomeEquityLinesOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CededCreditRiskAxis=pnbk_UnusedLineOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CededCreditRiskAxis=pnbk_UndisbursedConstructionLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CededCreditRiskAxis=pnbk_FinancialStandyLetterOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |