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Note 11 - Cash Surrender Value of Life Insurance (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Note 11 - Cash Surrender Value of Life Insurance (Details) [Line Items] |  |  |
Cash Surrender Value of Life Insurance | $ 0 us-gaap_CashSurrenderValueOfLifeInsurance | $ 22,025,000 us-gaap_CashSurrenderValueOfLifeInsurance |
Bank Owned Life Insurance Income | 439,000 us-gaap_BankOwnedLifeInsuranceIncome | 523,000 us-gaap_BankOwnedLifeInsuranceIncome | 517,000 us-gaap_BankOwnedLifeInsuranceIncome
Non-interest Income [Member] |  |  |
Note 11 - Cash Surrender Value of Life Insurance (Details) [Line Items] |  |  |
Life Insurance Liquidation | (455,000)pnbk_LifeInsuranceLiquidation / us-gaap_IncomeStatementLocationAxis = pnbk_NonInterestIncomeMember |  |
Non-interest Expense [Member] |  |  |
Note 11 - Cash Surrender Value of Life Insurance (Details) [Line Items] |  |  |
Life Insurance Liquidation | 437,000 pnbk_LifeInsuranceLiquidation / us-gaap_IncomeStatementLocationAxis = pnbk_NonInterestExpenseMember |  |
Provision for Income Taxes [Member] |  |  |
Note 11 - Cash Surrender Value of Life Insurance (Details) [Line Items] |  |  |
Life Insurance Liquidation | $ (1,700,000)pnbk_LifeInsuranceLiquidation / us-gaap_IncomeStatementLocationAxis = pnbk_ProvisionForIncomeTaxesMember |  |

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- Definition Amount of charges during the period related to the liquidation of a life insurance policy. + References No definition available. + Details
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- Details
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- Definition Earnings on or other increases in the value of the cash surrender value of bank owned life insurance policies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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Balance Type: | credit
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- Definition Carrying amount as of the balance sheet date of amounts which could be received based on the terms of the insurance contract upon surrendering life policies owned by the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 17 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 4 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6812-107765 + Details
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- Details
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