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Note 15 - Financial Instruments with Off-Balance-Sheet Risk (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Risks and Uncertainties [Abstract]
Banks Reserve Based on Analysis in Unfunded Commitments	$ 5,000pnbk_BanksReserveBasedOnAnalysisInUnfundedCommitments	$ 12,000pnbk_BanksReserveBasedOnAnalysisInUnfundedCommitments

X

- 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

X

- Details

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