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Note 8 - Borrowings (Details) (USD $) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Jun. 30, 2014 | Dec. 31, 2003
Note 8 - Borrowings (Details) [Line Items] |  |  |  |
Proceeds from Federal Home Loan Bank Advances |  | $ 50,000,000 us-gaap_ProceedsFromFederalHomeLoanBankAdvances |  |
Restructured Federal Home Loan Bank Advances |  | 10,000,000 pnbk_RestructuredFederalHomeLoanBankAdvances |  |
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Interest Rate |  | 2.19%us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRate |  |
Number of Years of Maturity Period Extended |  | 1 year |  |
Advances from Federal Home Loan Banks | 120,000,000 us-gaap_AdvancesFromFederalHomeLoanBanks | 57,000,000 us-gaap_AdvancesFromFederalHomeLoanBanks |  |
Preferred Stock, Shares Issued (in Shares) | 0 us-gaap_PreferredStockSharesIssued | 0 us-gaap_PreferredStockSharesIssued |  |
Derivative, Variable Interest Rate | 3.40%us-gaap_DerivativeVariableInterestRate |  |  |
Number of Consecutive Quarters for Interest Deferment | 20 pnbk_NumberOfConsecutiveQuartersForInterestDeferment |  |  |
Interest Payable | 147,000 us-gaap_InterestPayableCurrentAndNoncurrent |  | 1,600,000 us-gaap_InterestPayableCurrentAndNoncurrent |
Number of Years of Duration of Trust | 30 pnbk_NumberOfYearsOfDurationOfTrust |  |  |
Federal Home Loan Bank Borrowings [Member] | Minimum [Member] |  |  |  |
Note 8 - Borrowings (Details) [Line Items] |  |  |  |
Federal Home Loan Bank Borrowings Interest Rate |  | 0.77%pnbk_FederalHomeLoanBankBorrowingsInterestRate / us-gaap_FairValueByLiabilityClassAxis = us-gaap_FederalHomeLoanBankBorrowingsMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  |
Federal Home Loan Bank Borrowings [Member] | Maximum [Member] |  |  |  |
Note 8 - Borrowings (Details) [Line Items] |  |  |  |
Federal Home Loan Bank Borrowings Interest Rate |  | 3.69%pnbk_FederalHomeLoanBankBorrowingsInterestRate / us-gaap_FairValueByLiabilityClassAxis = us-gaap_FederalHomeLoanBankBorrowingsMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  |
Federal Home Loan Bank Borrowings [Member] |  |  |  |
Note 8 - Borrowings (Details) [Line Items] |  |  |  |
Long Term Debt Additional Available Amount | 27,800,000 pnbk_LongTermDebtAdditionalAvailableAmount / us-gaap_FairValueByLiabilityClassAxis = us-gaap_FederalHomeLoanBankBorrowingsMember |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | 2,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_FairValueByLiabilityClassAxis = us-gaap_FederalHomeLoanBankBorrowingsMember |  |  |
Long-term Line of Credit | 0 us-gaap_LineOfCredit / us-gaap_FairValueByLiabilityClassAxis = us-gaap_FederalHomeLoanBankBorrowingsMember | 0 us-gaap_LineOfCredit / us-gaap_FairValueByLiabilityClassAxis = us-gaap_FederalHomeLoanBankBorrowingsMember |  |
Unsecured Debt [Member] | Trust [Member] |  |  |  |
Note 8 - Borrowings (Details) [Line Items] |  |  |  |
Subordinated Debt | $ 8,200,000 us-gaap_SubordinatedDebt / dei_LegalEntityAxis = pnbk_TrustMember / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |  |  |
London Interbank Offered Rate (LIBOR) [Member] |  |  |  |
Note 8 - Borrowings (Details) [Line Items] |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 3.15%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |
Trust [Member] |  |  |  |
Note 8 - Borrowings (Details) [Line Items] |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent |  |  |  | 100.00%us-gaap_MinorityInterestOwnershipPercentageByParent / dei_LegalEntityAxis = pnbk_TrustMember
Preferred Stock, Shares Issued (in Shares) |  |  |  | 8,000,000 us-gaap_PreferredStockSharesIssued / dei_LegalEntityAxis = pnbk_TrustMember
Excess Tier One Risk Based Capital to Risk Weighted Assets |  |  |  | 25.00%us-gaap_ExcessTierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = pnbk_TrustMember

X
- Definition The interest rate of FHLB advances. + References No definition available. + Details
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- Definition The additional amount available under long term debt. + References No definition available. + Details
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- Definition The consecutive quarters for interest deferment. + References No definition available. + Details
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- Definition The number of years of maturity period extended. + References No definition available. + Details
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- Definition The advances from FHLB. + References No definition available. + Details
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- Definition Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 + Details
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- Definition The amount of excess Tier 1 Risk Based Capital (which consists of the types of financial capital considered the most reliable and liquid, primarily Shareholders' equity. Examples of Tier 1 capital are common stock or unit, preferred stock or unit that is irredeemable and noncumulative, and retained earnings) divided by risk-weighted assets which are assets that are weighted for credit risk according to a formula used by the Reserve Bank. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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- Definition Discloses the single interest rate [if] applicable to the advances from the Federal Home Loan Bank, by branch, as of the Balance Sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 + Details
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- Definition Amount of interest payable on debt, including, but not limited to, trade payables. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.15(a)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph a -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph 5 -Article 9 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + 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 210.5-02.19(b),22(b)) -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 19, 22 -Article 5 + Details
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- Definition Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt. + 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 210.5-02.28) -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 29 -Article 5 + Details
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- Definition Amount of cash inflow from proceeds of Federal Home Loan Bank (FHLBank) advances. + References No definition available. + Details
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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of subordinated debt (with initial maturities beyond one year or beyond the operating cycle if longer). Subordinated debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 10 -Section F Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Article 5 -Subsection 19, 20, 22 + Details
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