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Note 8 - Borrowings (Details) - Maturity of Borrowings (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014
Note 8 - Borrowings (Details) - Maturity of Borrowings [Line Items]
	$ 120,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
	8,248us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive
	128,248us-gaap_LongTermDebt
Fixed Interest Rate [Member]
Note 8 - Borrowings (Details) - Maturity of Borrowings [Line Items]
	120,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths / us-gaap_DebtInstrumentAxis = pnbk_FixedInterestRateMember
	120,000us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = pnbk_FixedInterestRateMember
Floating Interest Rate [Member]
Note 8 - Borrowings (Details) - Maturity of Borrowings [Line Items]
	8,248us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive / us-gaap_DebtInstrumentAxis = pnbk_FloatingInterestRateMember
	$ 8,248us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = pnbk_FloatingInterestRateMember

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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 7



Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22)

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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-Topic 942

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601



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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601



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