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v3.23.3

Fair Value and Interest Rate Risk - Narrative (Details) | Jun. 30, 2023 $ / shares
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Fair Value Disclosures [Abstract] |
Stock value par value (in usd per share) | $ 100

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- Definition Represents information about stock value par or stated value per share. + References No definition available. + Details
Name: | pnbk_StockValueParOrStatedValuePerShare
Namespace Prefix: | pnbk_
Data Type: | dtr-types1:perShareItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_FairValueDisclosuresAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration