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Deposits (Details Textual) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Deposits (Textual) [Abstract]
Deposits held for sale	$ 20,928,103	$ 24,705,381

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- Definition

Deposits held for sale.

+ References

No definition available.

+ Details

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

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- Details

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