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Deposits - Narrative (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
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Deposits [Abstract] |  |
Prepaid debit card deposits | $ 180.0 | $ 197.3

X
- Definition Represents prepaid debt card deposits. + References No definition available. + Details
Name: | pnbk_PrepaidDebitCardDeposits
Namespace Prefix: | pnbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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