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Financial Instruments with Off-Balance Sheet Risk (Details) (USD $) | Mar. 31, 2013
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Commitments to extend credit: |
Total Commitments to extend credit | $ 92,313,085
Future loan commitments [Member] |
Commitments to extend credit: |
Total Commitments to extend credit | 19,864,658
Home equity lines of credit [Member] |
Commitments to extend credit: |
Total Commitments to extend credit | 30,713,406
Unused lines of credit [Member] |
Commitments to extend credit: |
Total Commitments to extend credit | 36,328,703
Undisbursed construction loans [Member] |
Commitments to extend credit: |
Total Commitments to extend credit | 5,399,318
Financial standby letters of credit [Member] |
Commitments to extend credit: |
Total Commitments to extend credit | $ 7,000

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- Definition Commitments to extend credit. + References No definition available. + Details
Name: | pnbk_CommitmentsToExtendCredit
Namespace Prefix: | pnbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | pnbk_CommitmentsToExtendCreditAbstract
Namespace Prefix: | pnbk_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration