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Deposits - Narrative (Details) - USD ($) | Jun. 30, 2025 | Dec. 31, 2024
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Deposits [Abstract] |  |
Digit payment deposits | $ 216,900,000 | $ 265,500,000
Deposits sold | $ 24,700,000 | $ 0

X
- Definition Deposits Sold Amount + References No definition available. + Details
Name: | pnbk_DepositsSoldAmount
Namespace Prefix: | pnbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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