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Note 12 - Quantitative Information About Level 3 Fair Value Measurements (Details) - Fair Value, Measurements, Nonrecurring [Member] - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2016 | Dec. 31, 2015
Fair Value, Inputs, Level 3 [Member] | Fair Value of Collateral Approach [Member] | Minimum [Member] |  |  |
Quantitative Information about Level 3 Fair Value Measurements Range | [1],[2] | 14.00% |
Quantitative Information about Level 3 Fair Value Measurements Weighted Average Range | [1],[2] | (14.00%) |
Fair Value, Inputs, Level 3 [Member] | Fair Value of Collateral Approach [Member] | Maximum [Member] |  |  |
Quantitative Information about Level 3 Fair Value Measurements Range | [1],[2] | 23.00% |
Quantitative Information about Level 3 Fair Value Measurements Weighted Average Range | [1],[2] | (23.00%) |
Fair Value, Inputs, Level 3 [Member] | Fair Value of Collateral Approach [Member] | Weighted Average [Member] |  |  |
Quantitative Information about Level 3 Fair Value Measurements Range | [1],[2],[3] | 16.00% | 8.00%
Quantitative Information about Level 3 Fair Value Measurements Weighted Average Range | [1],[2],[3] | (16.00%) | (8.00%)
Fair Value, Inputs, Level 3 [Member] | Fair Value of Collateral Approach [Member] |  |  |
Impaired loans | [1],[2] | $ 1,959 | $ 363
Quantitative Information about Level 3 Fair Value Measurements Range | [1],[2] |  | 8.00%
Quantitative Information about Level 3 Fair Value Measurements Weighted Average Range | [1],[2] |  | (8.00%)
Fair Value, Inputs, Level 3 [Member] | Fair Value of Property Approach [Member] | Weighted Average [Member] |  |  |
Quantitative Information about Level 3 Fair Value Measurements Range | [1],[2],[3] | 9.60% |
Quantitative Information about Level 3 Fair Value Measurements Weighted Average Range | [1],[2],[3] | (9.60%) |
Quantitative Information about Level 3 Fair Value Measurements Range | [1],[2],[3] | 13.00% |
Quantitative Information about Level 3 Fair Value Measurements Weighted Average Range | [1],[2],[3] | (13.00%) |
Fair Value, Inputs, Level 3 [Member] | Fair Value of Property Approach [Member] |  |  |
Quantitative Information about Level 3 Fair Value Measurements Range | [1],[2] | 9.60% |
Quantitative Information about Level 3 Fair Value Measurements Weighted Average Range | [1],[2] | (9.60%) |
Other real estate owned | [1],[2] | $ 851 |
Quantitative Information about Level 3 Fair Value Measurements Range | [1],[2] | 13.00% |
Quantitative Information about Level 3 Fair Value Measurements Weighted Average Range | [1],[2] | (13.00%) |
Fair Value, Inputs, Level 3 [Member] |  |  |
Impaired loans |  | $ 1,959 | $ 363
Other real estate owned |  | 851 |
Impaired loans |  | 1,959 | 363
Other real estate owned |  | $ 851 |
[1] | Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses.
[2] | Fair value is generally determined through independent appraisals of the underlying collateral (in the case of impaired loans) or property (in the case of OREO), which include Level 3 inputs that are not identifiable.
[3] | The range and weighted average of qualitative factors such as economic conditions and estimated liquidation expenses are presented as a percent of the appraised value.

X
- Definition Ratio of the appraised fair value of impaired loans produced by qualitative factors such as economic conditions and estimated liquidation expenses. + References No definition available. + Details
Name: | pnbk_FairValueInputsAppraisedValue
Namespace Prefix: | pnbk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Ratio of the adjusted appraised fair value of impaired loans produced by qualitative factors such as economic conditions and estimated liquidation expenses. + References No definition available. + Details
Name: | pnbk_FairValueInputsAppraisedValueAdjustment
Namespace Prefix: | pnbk_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value portion of impaired loans receivable. + References No definition available. + Details
Name: | pnbk_ImpairedLoansFairValue
Namespace Prefix: | pnbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the fair value of other real estate owned. + References No definition available. + Details
Name: | pnbk_OtherRealEstateOwnedFairValue
Namespace Prefix: | pnbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
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- Details
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- Details
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Data Type: | na
Balance Type: |
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- Details
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- Details
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- Details
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- Details
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