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Consolidated Balance Sheets (Parentheticals) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Net of allowance for loan losses (in Dollars) 4,924us-gaap_AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables $ 5,681us-gaap_AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables
Preferred stock, shares authorized 1,000,000us-gaap_PreferredStockSharesAuthorized 1,000,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued 0us-gaap_PreferredStockSharesIssued 0us-gaap_PreferredStockSharesIssued
Preferred stock, shares outstanding 0us-gaap_PreferredStockSharesOutstanding 0us-gaap_PreferredStockSharesOutstanding
Preferred stock, par value (in Dollars per share) 0us-gaap_PreferredStockParOrStatedValuePerShare $ 0us-gaap_PreferredStockParOrStatedValuePerShare
Common stock, par value (in Dollars per share) 0.01us-gaap_CommonStockParOrStatedValuePerShare [1] $ 0.01us-gaap_CommonStockParOrStatedValuePerShare [1]
Common stock, shares authorized 100,000,000us-gaap_CommonStockSharesAuthorized [1] 100,000,000us-gaap_CommonStockSharesAuthorized [1]
Common stock, shares issued 3,952,177us-gaap_CommonStockSharesIssued [1] 3,878,668us-gaap_CommonStockSharesIssued [1]
Common stock, shares outstanding 3,951,007us-gaap_CommonStockSharesOutstanding [1] 3,877,497us-gaap_CommonStockSharesOutstanding [1]
Treasury stock, shares 1,170us-gaap_TreasuryStockShares [1] 1,170us-gaap_TreasuryStockShares [1]
Reverse Stock Split [Member]    
Reverse stock split 10us-gaap_StockholdersEquityNoteStockSplitConversionRatio1
/ us-gaap_NonmonetaryTransactionTypeAxis
= pnbk_ReverseStockSplitMember		  
[1] On March 4, 2015, the Company affected a 1-for-10 reverse stock split. All common stock data included in these financial statements has been restated to give effect to the reverse stock split.