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Fair Value and Interest Rate Risk - Narrative (Details)	Mar. 31, 2025 bond $ / shares	Dec. 31, 2024 bond
Fair Value Disclosures [Abstract]
Stock value par value (usd per share) | $ / shares	$ 100
Number of Level 3 instruments | bond	4	4

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- Definition

Number of Level 3 Instruments

+ References

No definition available.

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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_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

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- References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
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