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Note 14 - Financial Instruments with Off-balance Sheet Risk (Details) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Risks and Uncertainties [Abstract]
Banks Reserve Based on Analysis in Unfunded Commitments	$ 5,000	$ 5,000

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- Definition

Banks reserve based on analysis in unfunded commitments.

+ References

No definition available.

+ Details

Name:	pnbk_BanksReserveBasedOnAnalysisInUnfundedCommitments
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_RisksAndUncertaintiesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration