Cumulative change in shares of federal reserve bank stock

No definition available.

Name:	pnbk_CumulativeChangeInSharesOfFederalReserveBankStock
Namespace Prefix:	pnbk_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Tax year audited and whose audit was completed in the income tax examination, in CCYY format.

+ References

No definition available.

+ Details

Name:	pnbk_IncomeTaxExaminationYearUnderExaminationCompleted
Namespace Prefix:	pnbk_
Data Type:	xbrli:gYearItemType
Balance Type:	na
Period Type:	duration

- Definition

Maturity of federal funds, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	pnbk_MaturityOfFederalFunds
Namespace Prefix:	pnbk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

Name:	pnbk_Note1NatureofOperationsandSummaryofSignificantAccountingPoliciesDetailsLineItems
Namespace Prefix:	pnbk_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of operating branches.

+ References

No definition available.

+ Details

Name:	pnbk_NumberOfOperatingBranches
Namespace Prefix:	pnbk_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of possible cumulative change of federal reserve bank stock.

+ References

No definition available.

+ Details

Name:	pnbk_PercentageOfPossibleCumulativeChangeOfFederalReserveBankStock
Namespace Prefix:	pnbk_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Investments in SBA loans.

+ References

No definition available.

+ Details

Name:	pnbk_SBALoanFunds
Namespace Prefix:	pnbk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Stock value par or stated value per share.

+ References

No definition available.

+ Details

Name:	pnbk_StockValueParOrStatedValuePerShare
Namespace Prefix:	pnbk_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b),(c)
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319

+ Details

Name:	us-gaap_DeferredTaxAssetsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Federal Home Loan Bank (FHLB) stock represents an equity interest in a FHLB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 325
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6478792&loc=d3e63345-112809

+ Details

Name:	us-gaap_FederalHomeLoanBankStock
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Federal Reserve Bank stock represents an equity interest in the Federal Reserve Bank. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity).

+ References

+ Details

Name:	us-gaap_FederalReserveBankStock
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The sum of the amounts of estimated penalties and interest recognized in the period arising from income tax examinations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319

+ Details

Name:	us-gaap_IncomeTaxExaminationPenaltiesAndInterestExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Recorded investment of consumer mortgage loan receivables secured by residential real estate properties for which formal foreclosure proceedings are in process.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 35
-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL49126937-111524

+ Details

Name:	us-gaap_MortgageLoansInProcessOfForeclosureAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Tax year that remains open to examination under enacted tax laws, in CCYY format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319

+ Details

Name:	us-gaap_OpenTaxYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:gYearItemType
Balance Type:	na
Period Type:	duration

- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_TaxPeriodAxis=us-gaap_EarliestTaxYearMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TaxPeriodAxis=us-gaap_LatestTaxYearMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_FederalHomeLoanBankCertificatesAndObligationsFHLBMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentTypeAxis=pnbk_FederalReserveBankStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementGeographicalAxis=stpr_CT
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementGeographicalAxis=stpr_NY
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VestingAxis=pnbk_VestingPeriodOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_RestrictedStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VestingAxis=pnbk_VestingPeriodTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VestingAxis=pnbk_VestingPeriodThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeTaxAuthorityAxis=us-gaap_DomesticCountryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeTaxAuthorityNameAxis=us-gaap_InternalRevenueServiceIRSMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeTaxAuthorityAxis=us-gaap_StateAndLocalJurisdictionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeTaxAuthorityNameAxis=stpr_CT
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Details) [Line Items]
Maturity of Federal Funds	1 day
Federal Home Loan Bank Stock	$ 6,570,000	$ 6,628,000
Federal Reserve Bank Stock	$ 2,075,000	2,058,000
Percentage of Possible Cumulative Change of Federal Reserve Bank Stock	15.00%
Cumulative Change in Shares of Federal Reserve Bank Stock (in Shares) \| shares	100
SBA Loan Funds	$ 4,500,000
Mortgage Loans in Process of Foreclosure, Amount	363,000	0
Deferred Tax Assets, Net of Valuation Allowance	$ 13,763,000	14,926,000	$ 0
Income Tax Examination, Penalties and Interest Expense		$ 3,000
Earliest Tax Year [Member]
Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Details) [Line Items]
Income Tax Examination, Year under Examination, Completed	2004
Latest Tax Year [Member]
Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Details) [Line Items]
Income Tax Examination, Year under Examination, Completed	2009
Federal Home Loan Bank Certificates and Obligations (FHLB) [Member]
Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Details) [Line Items]
Stock Value Par or Stated Value Per Share (in Dollars per share) \| $ / shares	$ 100
Federal Reserve Bank Stock [Member]
Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Details) [Line Items]
Stock Value Par or Stated Value Per Share (in Dollars per share) \| $ / shares	$ 100
CONNECTICUT
Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Details) [Line Items]
Number of Operating Branches	7
NEW YORK
Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Details) [Line Items]
Number of Operating Branches	2
Vesting Period One [Member] \| Restricted Stock [Member]
Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		3 years
Vesting Period Two [Member] \| Restricted Stock [Member]
Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		4 years
Vesting Period Three [Member] \| Restricted Stock [Member]
Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		5 years
Domestic Tax Authority [Member] \| Internal Revenue Service (IRS) [Member] \| Earliest Tax Year [Member]
Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Details) [Line Items]
Open Tax Year	2010
State and Local Jurisdiction [Member] \| CONNECTICUT \| Earliest Tax Year [Member]
Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Details) [Line Items]
Open Tax Year	2014
State and Local Jurisdiction [Member] \| CONNECTICUT \| Latest Tax Year [Member]
Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Details) [Line Items]
Open Tax Year	2010
Minimum [Member]
Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Maximum [Member]
Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life	40 years