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Note 9 - Fair Value and Interest Rate Risk - Financial Assets Measured at Fair Value on a Non-recurring Basis (Details) - Fair Value, Measurements, Nonrecurring [Member] $ in Thousands | Dec. 31, 2016 USD ($)
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Other real estate owned, fair value | $ 851
Fair Value, Inputs, Level 1 [Member] |
Other real estate owned, fair value |
Fair Value, Inputs, Level 2 [Member] |
Other real estate owned, fair value |
Fair Value, Inputs, Level 3 [Member] |
Other real estate owned, fair value | $ 851

X
- Definition Represents the fair value of other real estate owned. + References No definition available. + Details
Name: | pnbk_OtherRealEstateOwnedFairValue
Namespace Prefix: | pnbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsNonrecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |