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Note 12 - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Unused Commitments to Extend Credit | $ 248,578 | $ 155,391
Consumer Loan Commitments as Percentage of Aggregate Commitments | 3.00% |
Commercial and Agricultural Loan Commitments as Percentage of Aggregate Commitments | 52.00% |
Real Estate Loan Commitments as Percentage of Aggregate Commitments | 45.00% |
Maximum Loan to Value Ratio | 80.00% |
Standby Letters of Credit [Member] |  |
Unused Commitments to Extend Credit | $ 0 | $ 0

X
- Definition Commercial and agricultural loan commitments as percentage of aggregate commitments. + References No definition available. + Details
Name: | plbc_CommercialAndAgriculturaLloanCommitmentsAsPercentageOfAggregateCommitments
Namespace Prefix: | plbc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Consumer loan commitments as percentage of aggregate commitments. + References No definition available. + Details
Name: | plbc_ConsumerLoanCommitmentsAsPercentageOfAggregateCommitments
Namespace Prefix: | plbc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Ratio of the value of a mortgage loan to the value of the underlying property. + References No definition available. + Details
Name: | plbc_MaximumLoanToValueRatio
Namespace Prefix: | plbc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Real estate loan commitments as percentage of aggregate commitments. + References No definition available. + Details
Name: | plbc_RealEstateLoanCommitmentsAsPercentageOfAggregateCommitments
Namespace Prefix: | plbc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Unused amount of commitments to extend credit to customers. + References No definition available. + Details
Name: | us-gaap_UnusedCommitmentsToExtendCredit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=us-gaap_StandbyLettersOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |