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Financial Instruments with Off-Balance Sheet Risk (Details Textual) (USD $)	Jun. 30, 2012
Financial Instruments with Off-Balance Sheet Risk (Textual) [Abstract]
Bank's reserve based on the growth in the unfunded commitments	$ 26,000

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- Definition

Bank's reserve based on the growth in the unfunded commitments.

+ References

No definition available.

+ Details

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Namespace Prefix:	pnbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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- Details

Name:	pnbk_FinancialInstrumentsWithOffBalanceSheetRiskTextualAbstract
Namespace Prefix:	pnbk_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration