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Note 11 - Cash Surrender Value of Life Insurance (Details) (USD $)	12 Months Ended
	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	$ 0us-gaap_CashSurrenderValueOfLifeInsurance	$ 22,025,000us-gaap_CashSurrenderValueOfLifeInsurance
Bank Owned Life Insurance Income	439,000us-gaap_BankOwnedLifeInsuranceIncome	523,000us-gaap_BankOwnedLifeInsuranceIncome	517,000us-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	437,000pnbk_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

X

- 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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- 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

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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

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