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v3.23.1

Fair Value and Interest Rate Risk - Narrative (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2023 bond $ / shares | Dec. 31, 2022 bond
Fair Value Disclosures [Abstract] |  |
Stock value par value (in usd per share) | $ / shares | $ 100 |
Number of derivatives purchased, Level 3 | bond | 4 | 4

X
- Definition Number of Bonds Purchased, Designated As Level 3 + References No definition available. + Details
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- Definition Represents information about stock value par or stated value per share. + References No definition available. + Details
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Namespace Prefix: | pnbk_
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Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
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