Document And Entity Information
Dividend yields
After ten years, estimated fair value
Note To Financial Statement Details Textual
Significant Accounting Policies
Note 2 - Summary of Significant Accounting Policies
Common stock retired in connection with the exercise of stock options
The fair value of stock retired in noncash financing activities.
Under one year, amortized cost
Note 3 - Fair Value Measurements
Risk free interest rate
Note 4 - Investment Securities
Under one year, fair value
Note 5 - Loans and the Allowance for Credit Losses
After one year through five years, estimated fair value
Note 6 - Premises and Equipment
After five years through ten years, estimated fair value
Note 7 - Deposits
Note 8 - Securities Sold Under Agreements to Repurchase
us-gaap_DebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainLossBeforeTax
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain (Loss), before Tax
Note 11- Leases
Note 12 - Commitments and Contingencies
Note 13 - Shareholders' Equity
Note 14 - Other Expenses
Note 15 - Income Taxes
Annualized Volatility
Note 16 - Related Party Transactions
Note 18 - Comprehensive Income
Note 19 - Business Combinations - Acquisition of Conerstone Community Bancorp
Note 20 - Parent Only Condensed Financial Statements
Note 2 - Summary of Significant Accounting Policies - Reconciliation of Purchase Price to Par Value (Details)
Expected life of stock options (Year)
Note 2 - Summary of Significant Accounting Policies - Change in Other Real Estate (Details)
Note 2 - Summary of Significant Accounting Policies - Intangible Assets (Details)
Note 2 -Summary of Significant Accounting Policies - Weighted Average Fair Value Assumptions (Details)
Note 3 - Fair Value Measurements - Carrying Amounts and Estimated Fair Values of Financial Instruments (Details)
US States and Political Subdivisions Debt Securities [Member]
Note 3 - Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details)
Automobile Loan [Member]
Note 3 - Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Non-recurring Basis (Details)
Note 3 - Fair Value Measurements - Quantitative Information About Level 3 Fair Value Measurements for Financial Instruments Measured at Fair Value on a Non-recurring Basis (Details)
Note 4 - Investment Securities - Amortized Cost and Estimated Fair Value of Investment Securities (Details)
us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroup
Financing Receivable, Held-for-Sale, Not Part of Disposal Group, after Valuation Allowance
Note 4 - Investment Securities - Investment Securities With Unrealized Losses (Details)
Note 4 - Investment Securities - Investment Securities by Contractual Maturity (Details)
Note 5 - Loans and the Allowance for Credit Losses - Outstanding Loans (Details)
Note 5 - Loans and the Allowance for Credit Losses - Loan Portfolio Allocated by Internal Risk Ratings (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)
Note 5 - Loans and the Allowance for Credit Losses - Balance of Nonaccrual Loans By Loan Category (Details)
12 months or more unrealized losses
Note 5 - Loans and the Allowance for Credit Losses - Reversal of Accrued Interest (Details)
Total unrealized losses
Note 5 - Loans and the Allowance for Credit Losses - Collateral Dependent Loans (Details)
Note 5 - Loans and the Allowance for Credit Losses - Loan Modifications (Details)
Note 5 - Loans and the Allowance for Credit Losses - Financial Effect of Loan Modifications (Details)
Note 5 - Loans and the Allowance for Credit Losses - Aging Analysis of the Loan Portfolio (Details)
Note 5 - Loans and the Allowance for Credit Losses - Allocation of the Allowance for Credit Losses (Details)
Note 5 - Loans and the Allowance for Credit Losses - Reserve for Unfunded Commitments (Details)
Less than 12 months unrealized losses
Note 6 - Premises and Equipment - Premises and Equipment (Details)
Note 7 - Deposits - Interest-bearing Deposits (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)
Note 7 - Deposits - Maturities of Time Deposits (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)
Note 8 - Securities Sold Under Agreements to Repurchase - Securities Sold Under Agreements to Repurchase (Details)
Note 11 - Leases - Maturity Analysis of Operating Lease Liability (Details)
Note 12 - Commitments and Contingencies - Financial Instruments Representing Off-balance-sheet Credit Risk (Details)
Note 13 - Shareholders' Equity - Basic and Diluted Earnings Per Share (Details)
Other comprehensive income :
Note 13 - Shareholders' Equity - Stock Option Activity (Details)
Note 13 - Shareholders' Equity - Stock Option Plan Cost (Details)
Note 13 - Shareholders' Equity - Regulatory Capital (Details)
Other comprehensive income
Other comprehensive income
Note 14 - Other Expenses - Other Expenses (Details)
Note 15 - Income Taxes - Provision for Income Taxes (Details)
Note 15 - Income Taxes - Deferred Tax Assets & Liabilities (Details)
Options exercisable, Weighted average exercise price (in dollars per share)
us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions
Note 15 - Income Taxes - Qualified Affordable Housing Projects (Details)
Options exercisable, Weighted average remaining contractual term in years (Year)
us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions
Note 15 - Income Taxes - Qualified Affordable Housing Projects (Details) (Parentheticals)
Options exercisable, Intrinsic value
us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions
Fair value of options vested
Note 15 - Income Taxes - Income Tax Rate Reconciliation (Details)
Note 15 - Income Taxes - Schedule of Income Taxes Paid (Details)
Total fair value
Note 16 - Related Party Transactions - Related Party Borrowers (Details)
Intrinsic value of options exercised
Note 18 - Comprehensive Income - Changes in OCI (Details)
Note 18 - Comprehensive Income - Reclassifications of OCI (Details)
Options exercisable, Shares (in shares)
Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block]
Note 19 - Business Combinations - Acquisition of Conerstone Community Bancorp - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Details)
Note 19 - Business Combinations - Acquisition of Conerstone Community Bancorp - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Details) (Parentheticals)
Options outstanding, Weighted average remaining contractual term in years (Year)
Note 19 - Business Combinations - Acquisition of Conerstone Community Bancorp - Schedule of PCD Loans (Details)
Less than 12 months fair value
Options outstanding, Intrinsic value
Weighted-average fair value of options granted during the year (in dollars per share)
Note 19 - Business Combinations - Acquisition of Conerstone Community Bancorp - Pro Forma (Details)
12 months or more fair value
Note 20 - Parent Only Condensed Financial Statements - Condensed Balance Sheets (Details)
Note 20 - Parent Only Condensed Financial Statements - Condensed Statements of Income and Comprehensive Income (Details)
Note 20 - Parent Only Condensed Financial Statements - Condensed Statements of Cash Flows (Details)
Notes To Financial Statements
Notes To Financial Statements [Abstract]
Financial Instruments [Domain]
us-gaap_LoansAndLeasesReceivableRelatedPartiesProceeds
Amounts repaid
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Options outstanding, Weighted average exercise price (in dollars per share)
Options outstanding, Weighted average exercise price (in dollars per share)
Options cancelled, Weighted average exercise price (in dollars per share)
Financial Instrument [Axis]
Disbursements
Options granted, Weighted average exercise price (in dollars per share)
Investment securities not due at a single maturity date, estimated fair value
Options exercised, Weighted average exercise price (in dollars per share)
Lessee, Operating Leases [Text Block]
Investment securities not due at a single maturity date, amortized cost
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Options outstanding, Shares (in shares)
Options outstanding, Shares (in shares)
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]
us-gaap_PolicyTextBlockAbstract
Accounting Policies
us-gaap_DebtSecuritiesAvailableForSaleRealizedGain
Debt Securities, Available-for-Sale, Realized Gain
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)
us-gaap_DebtSecuritiesAvailableForSaleRealizedLoss
Debt Securities, Available-for-Sale, Realized Loss
Debt Securities, Available-for-Sale [Table]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)
LIABILITIES AND SHAREHOLDERS' EQUITY
plbc_LoansHeldforsalePercentGuaranteed
Loans Held-for-sale, Percent Guaranteed
Represents the percentage of loans guaranteed in the loan portfolio.
SBA [Member]
Information related to the Small Business Administration (SBA).
us-gaap_Assets
Assets
Total assets
Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table]
Plan Name [Axis]
Plan Name [Domain]
SBA, RBS and FSA [Member]
Information related to the Small Business Administration (SBA), US Department of Agriculture Rural Business Cooperative Service (RBS) and Farm Services Agency (FSA).
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)
Tax benefit from option exercises
Tax benefit associated with compensation cost
Loans (net of Cornerstone's deferred costs/fees and allowance)
plbc_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentLoans
This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to loans acquired in connection with a business combination for which the initial accounting was incomplete.
Other assets
Award Type [Domain]
Award Date [Axis]
Award Date [Domain]
Proceeds from principal repayments from available-for-sale government-guaranteed mortgage-backed securities
Amount of cash inflow from principal repayments of investment in mortgage-backed security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).
Award Type [Axis]
Accumulated amortization
Core deposit intangible
Standby Letters of Credit [Member]
Gross carrying amount
Loss Contingency, Nature [Domain]
Loss Contingency Nature [Axis]
Bank Servicing [Member]
Commitments and Contingencies Disclosure [Text Block]
us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Less accumulated depreciation and amortization
Premises and equipment, net
Premises and equipment, net
Goodwill
Goodwill
Premises and equipment
us-gaap_TradingSecuritiesDebt
Debt Securities, Trading
Federal Reserve Bank Advances [Member]
us-gaap_HeldToMaturitySecurities
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Income before equity in undistributed income of bank subsidiary
Line of Credit [Member]
Provision for income taxes
Income Tax Expense (Benefit)
Provision for income taxes, Total
Income tax (expense) benefit
Short-Term Debt, Type [Axis]
Short-Term Debt, Type [Domain]
Commitments to extend credit
Unused Commitments to Extend Credit
us-gaap_MortgageLoansInProcessOfForeclosureAmount
Mortgage Loans in Process of Foreclosure, Amount
us-gaap_RealEstateAcquiredThroughForeclosure
Real Estate Acquired Through Foreclosure
Gain on termination of swaps
us-gaap_OtherRealEstateDisposals
Dispositions
Provision for change in OREO valuation
us-gaap_OtherRealEstateValuationAdjustments
Other Real Estate, Roll Forward [Table Text Block]
Additions
us-gaap_DefinedContributionPlanCostRecognized
Defined Contribution Plan, Cost
us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Defined Contribution Plan, Employer Discretionary Contribution Amount
us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent
us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay
Business development
us-gaap_DefinedContributionPlanNumberOfEmployees
Defined Contribution Plan, Number of Employees
Cash and cash equivalents
Cash and cash equivalents
Salaries and employee benefits
Telephone and data communications
Provision for Other Real Estate Owned (OREO) losses
us-gaap_AccretionExpense
Amortization of discount on borrowings
Amendment Flag
City Area Code
Use of Estimates, Policy [Policy Text Block]
New Accounting Pronouncements, Policy [Policy Text Block]
Reclassification, Comparability Adjustment [Policy Text Block]
us-gaap_GainsLossesOnSalesOfOtherRealEstate
Gains (Losses) on Sales of Other Real Estate
Net gain on sale of OREO
Current Fiscal Year End Date
us-gaap_NotesReceivableNet
Loans, net
us-gaap_DebtSecuritiesAvailableForSaleRealizedGainLoss
Debt Securities, Available-for-Sale, Realized Gain (Loss)
Document Fiscal Period Focus
Document Fiscal Year Focus
Consolidation, Policy [Policy Text Block]
Document Period End Date
plbc_DebtInstrumentLoanFee
Debt Instrument, Loan Fee
The amount of debt instrument loan fee.
Loan Agreement and Promissory Note [Member]
Related to loan agreement and promissory note.
Entity File Number
Tier 1 Leverage Ratio, Actual ratio
Tier 1 Leverage Ratio, For capital adequacy purposes ratio
Tier One Leverage Capital Required for Capital Adequacy to Average Assets
Entity Emerging Growth Company
Tier 1 Leverage Ratio, To be well-capitalized under prompt corrective provisions ratio
Tier One Leverage Capital Required to be Well Capitalized to Average Assets
Document Type
Total Risk-Based Capital Ratio, To be well-capitalized under prompt corrective provisions ratio
Capital Required to be Well Capitalized to Risk Weighted Assets
Low Income Housing Tax Credit Funds [Member]
Related to Low Income Housing Tax Credit Funds.
Entity Small Business
Entity Shell Company
Common Equity Tier 1 Ratio, Actual ratio
Document Information [Line Items]
Document Information [Table]
Service [Member]
Total Risk-Based Capital Ratio, Actual ratio
Total Risk-Based Capital Ratio, For capital adequacy purposes ratio
Capital Required for Capital Adequacy to Risk Weighted Assets
Entity Public Float
Entity Filer Category
Tier 1 Risk-Based Capital Ratio, Actual ratio
Entity Current Reporting Status
Tier 1 Risk-Based Capital Ratio, For capital adequacy purposes ratio
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets
Entity Voluntary Filers
Merger and acquisition expenses
Business Combination, Acquisition-Related Cost, Expense
Tier 1 Risk-Based Capital Ratio, To be well-capitalized under prompt corrective provisions ratio
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets
Entity Well-known Seasoned Issuer
Total Risk-Based Capital Ratio, Actual amount
Total Risk-Based Capital Ratio, For capital adequacy purposes amount
Total Risk-Based Capital Ratio, To be well-capitalized under prompt corrective provisions amount
us-gaap_NumberOfRealEstateProperties
Number of Real Estate Properties
Real Estate Property Ownership [Axis]
Bank owned life insurance
Bank Owned Life Insurance
Real Estate Properties [Domain]
Award Timing MNPI Disclosure [Text Block]
Tier 1 Leverage Ratio, Actual amount
us-gaap_GoodwillImpairmentLoss
Goodwill, Impairment Loss
us-gaap_AmortizationMethodQualifiedAffordableHousingProjectInvestments
Investment, Proportional Amortization Method, Elected, Amount
Tier 1 Leverage Ratio, For capital adequacy purposes amount
Tier 1 Leverage Ratio, To be well-capitalized under prompt corrective provisions amount
plbc_GainLossOnSaleOfOtherVehicles
Net loss on sale of other vehicles owned
Net gain (loss) during the period on the sale of other vehicles owned.
Common Equity Tier 1 Ratio, Actual amount
ecd_AwardTmgMnpiCnsdrdFlag
Award Timing MNPI Considered [Flag]
Statement of Comprehensive Income [Abstract]
Common Equity Tier 1 Ratio, For capital adequacy purposes amount
Entity Tax Identification Number
Common Equity Tier 1 Ratio, To be well-capitalized under prompt corrective provisions amount
Entity Central Index Key
Insider Trading Policies and Procedures [Line Items]
Tier 1 Risk-Based Capital Ratio, Actual amount
Entity Registrant Name
Tier 1 Risk-Based Capital Ratio, For capital adequacy purposes amount
ecd_InsiderTrdPoliciesProcAdoptedFlag
Insider Trading Policies and Procedures Adopted [Flag]
Tier 1 Risk-Based Capital Ratio, To be well-capitalized under prompt corrective provisions amount
Entity [Domain]
Legal Entity [Axis]
Entity Address, Address Line One
Amortization of acquired intangibles
Amortization of Core Deposit Intangible
Amortization of Intangible Assets
ecd_NonRule10b51ArrTrmntdFlag
Non-Rule 10b5-1 Arrangement Terminated [Flag]
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]
Entity Address, City or Town
ecd_Rule10b51ArrTrmntdFlag
Rule 10b5-1 Arrangement Terminated [Flag]
Banking Regulation, Regulatory Capital Requirement, Compliance [Table]
ecd_Rule10b51ArrAdoptedFlag
Rule 10b5-1 Arrangement Adopted [Flag]
Entity Address, Postal Zip Code
Other real estate owned
Beginning balance
Ending balance
Entity Address, State or Province
ecd_NonRule10b51ArrAdoptedFlag
Non-Rule 10b5-1 Arrangement Adopted [Flag]
Material Terms of Trading Arrangement [Text Block]
Entity Common Stock, Shares Outstanding
Trading Arrangements, by Individual [Table]
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]
Nonaccrual, Interest Income, Cash Basis Method [Member]
Amount of interest income recognized on a cash-basis method of accounting.
plbc_NumberOfSecuritiesSoldForLossDuringThePeriod
Number of Securities Sold for Loss During the Period
Represents the number of securities sold for loss during the period.
Advertising and promotion
Professional fees
plbc_NumberOfSecuritiesSoldForGainDuringThePeriod
Number of Securities Sold for Gain During the Period
Represents the number of securities sold for gain during the period.
Trading Symbol
Nature of Operation, Product Information, Concentration of Risk [Table]
Nature of Operations [Text Block]
Local Phone Number
Financing Receivable, Reversal of Accrued Interest Income [Table Text Block]
Tabular disclosure for the reversal of accrued interest income.
Gain on sale of buildings
Gain on sale of buildings
us-gaap_TableTextBlock
Notes Tables
Loss on sale of investment securities
Net loss on sale of investment securities
The Properties [Member]
Name of disposal group.
Off-Balance-Sheet, Credit Loss, Liability [Table Text Block]
Tabular disclosure of credit loss for credit exposure on off-balance-sheet commitment, including but not limited to, loan commitment, standby letter of credit, financial guarantee not accounted for as insurance. Excludes off-balance sheet credit exposure accounted for as insurance and instrument accounted for under derivatives and hedging.
us-gaap_FederalHomeLoanBankStock
Federal Home Loan Bank Stock
us-gaap_FederalReserveBankStock
Federal Reserve Bank Stock
us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresMaximumAmountAvailable
Federal Home Loan Bank, Advances, General Debt Obligations, Maximum Amount Available
us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresAmountOfAvailableUnusedFunds
Federal Home Loan Bank, Advances, General Debt Obligations, Amount of Available, Unused Funds
us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged
plbc_OperatingLeaseRenewalTermAnnualRentIncreasePercentage
Operating Lease, Renewal Term, Annual Rent Increase, Percentage
Represents the annual rent increase as a percentage during the renewal term of the contract.
plbc_OperatingLeaseTermOfContractAnnualRentIncreasePercentage
Operating Lease, Term of Contract, Annual Rent Increase, Percentage
Represents the annual rent increase as a percentage during the term of the contract.
Other operating expense
us-gaap_OtherCostAndExpenseOperating
Residential Mortgage Backed Securities Issued by US Government Sponsored Enterprises [Member]
Represents residential mortgage backed securities issued by US government sponsored enterprises.
Commercial Mortgage Backed Securities Issued by US Government Agencies [Member]
Represents commercial mortgage backed securities issued by US government agencies.
Other expenses
Other
us-gaap_InterestExpense
Total expenses
Interest on borrowings
Interest Expense, Debt
us-gaap_DisclosureTextBlockAbstract
Notes to Financial Statements
Interest on junior subordinated deferrable interest debentures
Defined Benefit Plan [Table]
Interest on borrowings
us-gaap_InterestExpenseShortTermBorrowings
Retirement Benefits [Text Block]
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
Finite-Lived Intangible Asset, Expected Amortization, Year Two
Interest on deposits
Fair Value of Financial Instruments, Policy [Policy Text Block]
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
Finite-Lived Intangible Asset, Expected Amortization, Year Three
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
Finite-Lived Intangible Asset, Expected Amortization, Year Four
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
Finite-Lived Intangible Asset, Expected Amortization, Year Five
Segment Reporting, Policy [Policy Text Block]
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
Finite-Lived Intangible Asset, Expected Amortization, Year One
Business Combination [Policy Text Block]
us-gaap_FiniteLivedIntangibleAssetUsefulLife
Finite-Lived Intangible Asset, Useful Life (Year)
Earnings Per Share, Policy [Policy Text Block]
Interest expense:
Income Tax Uncertainties, Policy [Policy Text Block]
Comprehensive Income, Policy [Policy Text Block]
us-gaap_OtherInterestAndDividendIncome
Other
Income Tax, Policy [Policy Text Block]
Dividends declared by bank subsidiary
us-gaap_InterestAndDividendIncomeOperating
Total interest income
Schedule of Finite-Lived Intangible Assets [Table Text Block]
us-gaap_LesseeOperatingLeaseTermOfContract
Lessee, Operating Lease, Term of Contract (Year)
us-gaap_LesseeOperatingLeaseRenewalTerm
Lessee, Operating Lease, Renewal Term (Year)
us-gaap_FinancingReceivableExcludingAccruedInterestRevolvingWriteoff
Loans, Revolving, Write-offs
us-gaap_FinancingReceivableExcludingAccruedInterestRevolvingConvertedToTermLoanWriteoff
Loans, Revolving Converted to Term, Write-offs
us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYearWriteoff
Loans, Year Four, Write-offs
us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYearWriteoff
Loans, Year Five, Write-offs
Time, $250,000 or more
us-gaap_FinancingReceivableExcludingAccruedInterestModifiedPeriod
Modified
us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearWriteoff
Loans, Prior, Write-offs
us-gaap_FinancingReceivableExcludingAccruedInterestModifiedSubsequentDefault
Financing Receivable, Excluding Accrued Interest, Modified, Subsequent Default
us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearWriteoff
Loans, Year Three, Write-offs
us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYearWriteoff
Loans, Year One, Write-offs
us-gaap_FinancingReceivableModificationToTotalFinancingReceivablesExcludingAccruedInterestPercent
% of total segment financing receivables
Share-Based Payment Arrangement [Policy Text Block]
Equity [Text Block]
us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearWriteoff
Loans, Year Two, Write-offs
Weighted average term extension (Month)
us-gaap_FinancingReceivableModifiedWeightedAverageTermIncreaseFromModification
us-gaap_TimeDepositMaturitiesYearFour
2029
us-gaap_TimeDepositMaturitiesYearFive
2030
Taxable
us-gaap_TimeDepositMaturitiesAfterYearFive
thereafter
Exempt from Federal income taxes
us-gaap_TimeDepositMaturitiesYearOne
2026
us-gaap_TimeDepositMaturitiesYearTwo
2027
us-gaap_TimeDepositMaturitiesYearThree
2028
us-gaap_AmortizationOfDeferredLoanOriginationFeesNet
Change in deferred loan origination costs/fees, net
Interest and fees on loans
us-gaap_DepositLiabilitiesReclassifiedAsLoansReceivable1
Deposit Liabilities Reclassified as Loans Receivable
us-gaap_DeferredTaxAssetsValuationAllowance
Deferred Tax Assets, Valuation Allowance
Other Real Estate, Residential Real Estate [Member]
Pertains to the type of other real estate.
Interest income:
us-gaap_DeferredTaxAssetsLiabilitiesNet
Deferred Tax Assets, Net
Net deferred tax assets
Goodwill and Intangible Assets, Intangible Assets, Policy [Policy Text Block]
us-gaap_DeferredTaxAssetsOther
Other
us-gaap_DeferredTaxAssetsGross
Deferred Tax Assets, Gross
Total deferred tax assets
Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]
us-gaap_DeferredIncomeTaxLiabilities
Deferred Tax Liabilities, Gross
Total deferred tax liabilities
CALIFORNIA
Non-Interest Income
us-gaap_NoninterestIncome
Total non-interest income
Revenue
Unrealized loss on available-for-sale investment securities
Other Time
us-gaap_NoninterestIncomeOther
Other
Earnings on bank owned life insurance policies, net
Bank Owned Life Insurance Income
Earnings on bank owned life insurance policies
Deposit Liabilities Disclosures [Text Block]
Deposit Liability [Table]
Non-interest income:
Federal Reserve Bank Stock [Policy Text Block]
Disclosure of accounting policy for Federal Reserve Bank stock.
us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment
Premises and equipment
State taxes
Provision
us-gaap_ProvisionForLoanLeaseAndOtherLosses
us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss
Net interest income after provision for credit losses
us-gaap_ProvisionForLoanLossesExpensed
Provision for credit losses
Repurchase Agreement, Counterparty [Table]
Lender Banks [Member]
Represents the lender banks.
Cumulative Effect, Period of Adoption [Domain]
Cumulative Effect, Period of Adoption [Axis]
us-gaap_PropertyPlantAndEquipmentUsefulLife
Property, Plant and Equipment, Useful Life (Year)
us-gaap_InterestIncomeExpenseNet
Net interest income before provision for credit losses
Cumulative Effect, Period of Adoption, Adjustment [Member]
Maximum month-end balance during the year
Maximum month end balance during period for securities sold under agreements to repurchase.
us-gaap_GrossInvestmentIncomeOperating
Total income
Weighted average interest rate at year-end
The weighted average interest rate at period end for assets sold under agreements to repurchase.
Furniture Equipment And Leasehold Improvements [Member]
Represents information about furniture equipment and leasehold improvements.
plbc_SecuritiesSoldUnderAgreementsToRepurchaseTerm
Securities Sold Under Agreements to Repurchase, Term (Year)
Period of time between issuance and maturity of securiteis sold under agreements to repurchase, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.
plbc_UnsecuredShortTermBorrowingAgreementAmountAvailableForBorrowing
Unsecured Short-term Borrowing Agreement, Amount Available for Borrowing
Available borrowing capacity under a short-term borrowing agreement.
Lender Bank One [Member]
Represents lender bank one.
Average daily balance during the year
Average daily balance during the period for securities sold under agreements to repurchase.
Allowance for credit losses
Furniture and Fixtures [Member]
Lender Bank Two [Member]
Represents lender bank two.
Deferred compensation
Building [Member]
Land [Member]
Repurchase Agreements, Resale Agreements, Securities Borrowed, and Securities Loaned Disclosure [Text Block]
Property, Plant and Equipment, Policy [Policy Text Block]
Property, Plant and Equipment [Table]
Long-Lived Tangible Asset [Axis]
Long-Lived Tangible Asset [Domain]
Acquired Net operating loss
plbc_CommercialAndAgriculturaLloanCommitmentsAsPercentageOfAggregateCommitments
Commercial and Agricultural Loan Commitments as Percentage of Aggregate Commitments
Commercial and agricultural loan commitments as percentage of aggregate commitments.
plbc_RealEstateLoanCommitmentsAsPercentageOfAggregateCommitments
Real Estate Loan Commitments as Percentage of Aggregate Commitments
Real estate loan commitments as percentage of aggregate commitments.
plbc_ConsumerLoanCommitmentsAsPercentageOfAggregateCommitments
Consumer Loan Commitments as Percentage of Aggregate Commitments
Consumer loan commitments as percentage of aggregate commitments.
Outside service fees
Amount of expense for outside service fees.
plbc_MaximumLoanToValueRatio
Maximum Loan to Value Ratio
Ratio of the value of a mortgage loan to the value of the underlying property.
Amortization of investment security premiums
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
Cash and cash equivalents at beginning of year
Cash and cash equivalents at end of year
Assets [Abstract]
Loan collection costs
Amount of loan collection expenses.
Deferred tax assets:
Armored car and courier
Amount of expense related to armored cars and couriers.
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
Decrease in cash and cash equivalents
Director compensation, education and retirement
Amount of expense related to director compensation and retirements.
us-gaap_NetCashProvidedByUsedInFinancingActivities
Net cash used in provided by financing activities
us-gaap_SaleAndLeasebackTransactionGainLossNet
Sale and Leaseback Transaction, Gain (Loss), Net
Director [Member]
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation
Net cash provided by operating activities
us-gaap_DeferredTaxLiabilitiesOther
Other
us-gaap_NetCashProvidedByUsedInInvestingActivities
Net cash provided by (used in) investing activities
Interest on obligations of states and political subdivisions, percent
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to interest on obligations of states and political subdivisions.
Net increase in cash surrender value of bank owned life insurance, percent
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to the cash surrender value of life insurance business.
us-gaap_DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts
Deferred loan costs
Sale Leaseback Transaction, Name [Domain]
Former Executives Officer [Member]
Represents information about former executives officer.
us-gaap_DeferredTaxLiabilitiesLeasingArrangements
Right-of-use assets
Former Director [Member]
Represents information about former director.
Undisbursed commitments to related parties, December 31, 2025
Carrying amount as of the balance sheet date of loan commitments to related parties.
plbc_DefinedContributionPlanSalaryContinuationPeriod
Defined Contribution Plan, Salary Continuation Period (Year)
The period for which retired directors and executives will receive monthly benefits.
Sale Leaseback Transaction, Description [Axis]
Investment, Policy [Policy Text Block]
Investment in bank subsidiary
Amount of investment in bank subsidiary.
Earnings from investment in Plumas Statutory Trust I and II
Amount of earnings during the period from investments in statutory trusts.
Deferred tax liabilities:
us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings
Gain (Loss) on Fair Value Hedges Recognized in Earnings
us-gaap_PaymentsOfDividendsCommonStock
Cash dividends paid on common stock
Pro Forma [Member]
us-gaap_OtherNoninterestExpense
Other
Other non-interest expense
Common Equity Tier 1 Ratio, For capital adequacy purposes ratio
Common Equity Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets
The minimum Common Equity Tier One Capital Ratio (Common Equity Tier one capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action.
us-gaap_NoninterestExpense
Total non-interest expenses
Scenario [Domain]
Forecast [Member]
Deposit insurance
Common Equity Tier 1 Ratio, To be well-capitalized under prompt corrective provisions ratio
Common Equity Tier One Risk Based Capital Required to Be Well Capitalized to Risk Weighted Assets
The Common Equity Tier 1 capital ratio (Common Equity Tier 1 capital divided by risk weighted assets) required to be categorized as "well capitalized" under the regulatory framework for prompt corrective action.
Cash received from option exercises
Proceeds from exercise of stock options
Title and Position [Domain]
Current, State
Title and Position [Axis]
Deferred, State
Scenario [Axis]
us-gaap_StateAndLocalIncomeTaxExpenseBenefitContinuingOperations
Provision for income taxes, State
Non-interest expenses:
Accounting Standards Update 2016-13 [Member]
Current, federal
Deferred, federal
us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperations
Provision for income taxes, federal
us-gaap_IncomeTaxExaminationPenaltiesAndInterestAccrued
Income Tax Examination, Penalties and Interest Accrued
Collateral Held [Domain]
Collateral Pledged [Member]
Feather River Bancorp, Inc. [Member]
Represents Feather River Bancorp, Inc.
Real Estate Loan [Member]
Unfunded Loan Commitment [Member]
Current, Total
Collateral Held [Axis]
Class of Financing Receivable [Domain]
us-gaap_PaymentsForRepurchaseOfTrustPreferredSecurities
Redemption of Trust Preferred Securities
Construction Loans [Member]
Class of Financing Receivable [Axis]
Financing Receivable Portfolio Segment [Domain]
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Income before income taxes
Commercial Portfolio Segment [Member]
Residential Portfolio Segment [Member]
Consumer Portfolio Segment [Member]
Reclassification out of Accumulated Other Comprehensive Income [Member]
Financing Receivable Portfolio Segment [Axis]
plbc_PolicyTable
Reclassification out of Accumulated Other Comprehensive Income [Axis]
ICFR Auditor Attestation Flag
Reclassification out of Accumulated Other Comprehensive Income [Domain]
Comprehensive Income (Loss) Note [Text Block]
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]
Increase in other borrowings
plbc_AssetThresholdToQualifyForThePolicyStatementAfterAdoptedFinalAmendmentsToTheSmallBankHoldingCompanyPolicyStatment
Asset Threshold to Qualify for the Policy Statement after Adopted Final Amendments to the Small Bank Holding Company Policy Statment
The asset threshold to qualify for the policy statement after adopted final amendments to the Samll Bank Holding Company Policy Statement (Regulation Y, Appendix C).
us-gaap_RepaymentsOfOtherDebt
Repayments on other borrowings
State and Local Jurisdiction [Member]
Income Tax Authority, Name [Axis]
Income Tax Authority, Name [Domain]
Past due 90 days or more and still accruing
us-gaap_FinancingReceivableExcludingAccruedInterest90DaysOrMorePastDueStillAccruing
90 Days and Still Accruing
Income Tax Jurisdiction [Axis]
Income Tax Jurisdiction [Domain]
Financing Receivable, Held-for-Investment, Foreclosed Asset [Policy Text Block]
Domestic Tax Jurisdiction [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process
Loans
Recoveries
Financing Receivable, Held-for-Sale [Policy Text Block]
Financing Receivable, Held-for-Investment [Policy Text Block]
us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff
Loans, Total, Write-offs
Charge-offs
Initial allowance on acquired PCD loans
Cash and Cash Equivalents, Policy [Policy Text Block]
plbc_NumberOfMortgageLoansInProcessOfForeclosure
Number of Mortgage Loans in Process of Foreclosure
The number of mortgage loans in process of foreclosure.
Total nonaccrual
us-gaap_FinancingReceivableExcludingAccruedInterestNonaccrual
Nonaccrual
Accounting Policies [Abstract]
Significant Accounting Policies [Text Block]
Subordinated Borrowings Disclosure [Text Block]
Cash dividends on common stock, per share (in dollars per share)
Bank Owned Life Insurance, Policy [Policy Text Block]
Disclosure of accounting policy related to bank owned life insurance.
us-gaap_CommonStockDividendsPerShareCashPaid
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share)
Occupancy and equipment
This item represents occupancy and equipment expense.
Investment in Federal Home Loan Bank Stock, Policy [Policy Text Block]
Disclosure of accounting policy for investments in Federal Home Loan Bank stock.
Dividends, Policy [Policy Text Block]
Disclosure of accounting policy for dividends.
Condensed Financial Information of Parent Company Only Disclosure [Text Block]
AOCI, Gain (Loss), Debt Securities, Available-for-Sale, without Allowance for Credit Loss, Parent [Member]
plbc_NumberOfSecuritiesSoldDuringPeriod
Number of Securities Sold During Period
This item represents the number of securities sold during the period.
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
Accounts and Financing Receivables [Table]
Auditor Name
Accrued interest payable and other liabilities
Auditor Firm ID
Schedule of Securities Financing Transactions [Table Text Block]
Auditor Location
plbc_NumberOfInvestmentSecurities
Number of Investment Securities
This item represents the number of investment securities held by the Company.
Pledging Purpose [Domain]
us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)
us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Diluted shares (in shares)
Pledging Purpose [Axis]
us-gaap_OperatingLossCarryforwards
Operating Loss Carryforwards
Payments for (Proceeds from) Available-for-Sale Securities, Short-Term
Interest income reversed
Statement of Financial Position [Abstract]
Diluted earnings per common share (in dollars per share)
Basic shares (in shares)
Other, net, percent
us-gaap_EffectiveIncomeTaxRateContinuingOperations
Total, percent
Business Combination [Axis]
Basic earnings per common share (in dollars per share)
Enactment of new tax laws, percent
Business Combination [Domain]
Credit Loss, Financial Instrument [Policy Text Block]
Statement of Cash Flows [Abstract]
Statement of Stockholders' Equity [Abstract]
Lease Contractual Term [Domain]
Lease Contractual Term [Axis]
Net increase (decrease) in securities sold under agreements to repurchase
us-gaap_ProceedsFromIssuanceOfDebt
Proceeds from Issuance of Debt
us-gaap_RepaymentsOfDebt
Repayments of Debt
Financing Receivable, Current, Allowance for Credit Loss [Table Text Block]
plbc_DeferredLoanOriginationCosts
Deferred Loan Origination Costs
This item represents loan origination costs that have been deferred.
plbc_AvailableforsaleSecuritiesIncomeTaxExpenseBenefitOnAccumulatedGrossUnrealizedGainsLosses
Available-for-sale Securities Income Tax Expense (Benefit) on Accumulated Gross Unrealized Gains Losses
This item represents the tax expense (benefit) occurring during the period which are related to the gross unrealized gain (loss) resulting from changes in the fair [carrying] value during the period of available-for-sale securities. Such tax effects would have been charged or credited directly to accumulated other comprehensive income or to related components of shareholders' equity.
plbc_NumberOfBranches
Number of Branches
Represents the number of branches operated by a bank.
us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
Business Combination, Consideration Transferred, Equity Interest, Share Issued, Number of Shares (in shares)
plbc_ImpairedLoansFairValue
Collateral dependent loans, fair value
Represents fair value portion of impaired loans.
Total purchase accounting adjustments
us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred
plbc_ImpairedLoansMeasurementInput
Collateral dependent loans, measurement input
Value of input used to measure impaired loans.
Commercial Loans [Member]
This item represents commercial loans.
Investments Classified by Contractual Maturity Date [Table Text Block]
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Equity Lines of Credit [Member]
This item represents loans classified as equity lines of credit.
Bank premises and equipment
us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentPropertyPlantAndEquipment
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Other Loans [Member]
This item represents all other loans not classified separately.
Core deposit intangible asset
us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles
plbc_DebtInstrumentCovenantMaximumDebtOutstanding
Debt Instrument, Covenant, Maximum Debt Outstanding
Represents the maximum debt outstanding based on an agreement.
Schedule of Available-for-Sale Securities Reconciliation [Table Text Block]
Affordable housing amortization, percent
us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsInvestment
Affordable housing tax credit and benefits, percent
Net (decrease) increase in time deposits
us-gaap_LoansAndLeasesReceivableRelatedParties
Balance
Balance
State and Local Income Taxes, Net of Federal Income Tax Effect, percent
Fair Value Measurements, Nonrecurring [Table Text Block]
Stock Option Plan 2013 [Member]
This item represents the Stock Option Plan that was established in 2013.
Other, net
us-gaap_StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithoutRegulatoryApproval
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments without Regulatory Approval
Cash flows from financing activities:
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
US Federal Statutory Tax Rate, percent
Enactment of new tax laws
us-gaap_BusinessCombinationAcquiredReceivablesGrossContractualAmount
Business Combination, Acquired Receivable, Purchased without Credit Deterioration, Gross Contractual Amount
us-gaap_BusinessCombinationAcquiredReceivablesEstimatedUncollectible
Business Combination, Acquired Receivable, Purchased without Credit Deterioration, Contractual Cash Flow, Estimated Uncollectible
plbc_CapitalConservationBuffer
Capital Conservation Buffer
An additional amount held in risk-based capital designed to ensure that banks build up capital buffers outside periods of stress which can be drawn down as losses are incurred. The requirement is based on simple capital conservation rules designed to avoid breaches of minimum capital requirements.
us-gaap_BusinessCombinationAcquiredReceivablesFairValue
Business Combination, Acquired Receivable, Purchased without Credit Deterioration, Fair Value
Proceeds from bank owned life insurance
Fair value of net identifiable assets acquired from Cornerstone
Net identifiable assets
Less: fair value of net assets acquired from Cornerstone
plbc_LoansOriginatedForsale
Loans originated for sale
This item represents the cash outflow for loans originated for sale.
Pledged Status [Domain]
Net (decrease) increase in demand, interest-bearing and savings deposits
This item represents the net increase (decrease) in demand, interest bearing and savings deposits.
Pledged Status [Axis]
Real estate and vehicles acquired through foreclosure/repossession
This item represents the value of real estate and vehicles acquired through foreclosure.
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
Total liabilities assumed
us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
Cash acquired in acquisition, net of consideration paid
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest
Class of Stock [Axis]
Class of Stock [Domain]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Cash payment
Payments to Acquire Businesses, Gross
Cash paid in acquisition
Investment securities available for sale, amortized cost
Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss
Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss
Affordable housing amortization
Deferred tax asset (tax effect of purchase accounting adjustments at 29.56% plus tax on cash paid on termination of stock options)
us-gaap_IncomeTaxReconciliationTaxCreditsInvestment
Affordable housing tax credit and benefits
State and Local Income Taxes, Net of Federal Income Tax Effect
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
Bank premises and equipment
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
Core deposit intangible
US Federal Statutory Tax Rate
Investment securities available for sale, Estimated fair value
Investment securities available for sale, net of allowance for credit losses of $0 at December 31, 2025 and 2024
Debt Securities, Available-for-Sale, Excluding Accrued Interest
Debt Securities, Available-for-Sale, Excluding Accrued Interest
Income Tax Disclosure [Text Block]
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
Cash and cash equivalents
us-gaap_DebtSecuritiesHeldToMaturityExcludingAccruedInterestBeforeAllowanceForCreditLoss
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss
Equity issuance
Accumulated Other Comprehensive Income (Loss) [Table]
Merger consideration (cash payments of $16.1 million and $45.2 million in stock)
Business Combination, Consideration Transferred
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
plbc_PurchaseOfGreenenergyTransferableTaxCredits
Purchase of green-energy transferable tax credit
The purchase amount of green-energy transferable tax credits
Non-purchased Credit Deteriorated Loans [Policy Text Block]
The entire policy disclosure for non-purchased credit deteriorated loans.
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
Pass [Member]
plbc_GuaranteedLoansWithUnpaidbalance
Guaranteed Loans With Unpaid Balance
Government guaranteed loans with unpaid balance.
Proceeds from sale of available-for-sale securities
Proceeds from Sale of Debt Securities, Available-for-Sale
Internal Credit Assessment [Axis]
Proceeds from matured and called available-for-sale investment securities
Internal Credit Assessment [Domain]
Share-Based Payment Arrangement, Cost by Plan [Table Text Block]
Business Combination, Pro Forma Information [Table]
Net Income
us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss
Proceeds from sale of other real estate
Proceeds from Sale of Other Real Estate
Business Combination, Pro Forma Information [Table Text Block]
Year Ended December 31, 2025
us-gaap_BusinessAcquisitionsProFormaRevenue
plbc_AllocatedShareBasedCompensationExpenseNetOfTaxPerDilutedshare
Allocated Share Based Compensation Expense Net of Tax Per Diluted Share (in dollars per share)
Diluted share allocated share based compensation expense which is net of tax.
Purchase Agreement [Member]
Relating to purchase agreement.
Two Administrative Buildings Located in Quincy California [Member]
Relating to two administrative buildings located in Quincy California.
BBS Branch III, LLC [Member]
Relating to BBS Branch III, LLC.
plbc_FederalHomeLoanBankAdvancesGeneralDebtObligationsStockNeededToReachMaximumAmount
Federal Home Loan Bank, Advances, General Debt Obligations, Stock Needed to Reach Maximum Amount
Represents the amount of Federal Home Loan Bank stock needed to reach maximum borrowing amount.
us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt
Purchases of available-for-sale investment securities
Financial Asset, Past Due [Member]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest
Allowance for credit losses
Loans, Balance
Loans, Balance
plbc_InvestmentProgramMeasurementInput
Investment Program, Measurement Input
Represents the measurement input of an investment program.
Financial Asset, Not Past Due [Member]
Loans, less allowance for credit losses of $19,959,000 at December 31, 2025 and $13,196,000 at 2024
us-gaap_ProceedsFromSaleOfProductiveAssets
Proceeds from Sale of Productive Assets
Schedule Of Interest Bearing Deposits [Table Text Block]
Tabular disclosure of interest bearing deposits.
Provision on acquired loans
Amount of expense (reversal of expense) for expected credit loss for off-balance sheet credit exposure on loan purchased.
Schedule of Maturities of Time Deposits [Table Text Block]
Tabular disclosure of maturities of time deposits.
Accretion of discount on loans
Accretion of discount on loans
Amount of accretion of discounts on loans.
us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss
Loans, amortized cost basis
Loans, Total
Credit Facility [Axis]
Other State Tax Authorities [Member]
Relating to other state tax authorities.
Credit Facility [Domain]
Schedule of Income Taxes Paid [Table Text Block]
The tabular disclosure of income taxes paid.
Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block]
Vesting of stock options assumed in merger
Value of stock related to Stock Options vested during the period.
us-gaap_FinancingReceivableNonaccrualInterestIncome
Financing Receivable, Nonaccrual, Interest Income
Accretion of premium on time deposits acquired
Accretion of premium on time deposits
Amount of accretion of premium on time deposits.
Proceeds from sale of buildings
plbc_EffectiveIncomeTaxRateReconciliationIncreaseDecreaseInCashSurrenderValueOfLifeInsuranceBusinessAmount
Net increase in cash surrender value of bank owned life insurance
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to cash surrender value of bank owned life insurance.
Amortization of discount on subordinated debentures
Amortization of discount on subordinated debentures
Amount of accretion of discounts on subordinated debentures.
Interest on obligations of states and political subdivisions
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to interest on obligations of states and political subdivisions.
us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear
Loans, Year Five
Special Mention [Member]
plbc_OtherRealEstateOwnedAndReceivablesFairValue
Total
Fair value portion of other real estate owned and receivables.
us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear
Loans, Year Four
Substandard [Member]
us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear
Loans, Year One
plbc_OtherRealEstateOwnedAndReceivablesLossGainFairValue
Total, total loss
Amount of fair value loss or gain for other real estate owned and receivables.
us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear
Loans, Year Three
plbc_ReceivablesLossGainFairValueDisclosure
Equity lines of credit, total loss
Amount of fair value loss or gain for receivables.
us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear
Loans, Prior
Green Energy Tax Credits [Member]
Relating to green energy tax credits.
Common stock issued in acquisition
us-gaap_FinancingReceivableExcludingAccruedInterestRevolving
Loans, Revolving
Livestock [Member]
Represents livestock.
us-gaap_FinancingReceivableExcludingAccruedInterestRevolvingConvertedToTermLoan
Loans, Revolving Converted to Term
plbc_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsAssumedInPeriod
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Assumed in Period (in shares)
Gross number of share options assumed during period.
us-gaap_FinancingReceivablePurchasedWithCreditDeteriorationAmountAtPurchasePrice
Fair Value (Purchase Price)
Par value of Acquired PCD Loans
us-gaap_FinancingReceivablePurchasedWithCreditDeteriorationAllowanceForCreditLossAtAcquisitionDate
Less Credit Mark (ACL)
us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear
Loans, Year Two
us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Purchases of premises and equipment
Effect of dilutive of stock options and restricted stock (in shares)
us-gaap_FinancingReceivablePurchasedWithCreditDeteriorationDiscountPremium
Less: Interest Mark (Non-Credit Discount)
plbc_ReceivablesMeasurementInput
Equity lines of credit, measurement input
Value of input used to measure receivables.
Supplemental noncash disclosures:
Weighted Average Number of Shares Outstanding:
us-gaap_IncomeTaxesPaidNet
Total
Deferred loan costs, net
Supplemental disclosure of cash flow information:
Loan Restructuring Modification [Axis]
Loan Restructuring Modification [Domain]
us-gaap_OperatingLeaseExpense
Operating Lease, Expense
Extended Maturity [Member]
plbc_BusinessCombinationRecognizedAssetAcquiredLoans
Loans
Amount of loans acquired in business combination and recognized at acquisition date.
plbc_BusinessCombinationRecognizedAssetAcquiredBankOwnedLifeInsurance
Bank owned life insurance
Amount of bank owned life insurance acquired in business combination and recognized at acquisition date.
plbc_BusinessCombinationRecognizedLiabilityAssumedNoninterestBearingDeposits
Non-interest bearing
Amount of non-interest bearing deposits assumed in business combination and recognized at acquisition date.
plbc_BusinessCombinationRecognizedAssetAcquiredInvestmentSecurities
Investment Securities
Amount of investment securities acquired in business combination and recognized at acquisition date.
Cornerstone Common Stock [Member]
Represents Cornerstone Common Stock.
us-gaap_DebtInstrumentVariableInterestRateTypeExtensibleEnumeration
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]
plbc_BusinessCombinationConsiderationTransferredValueNumberOfTradingDays
Business Combination, Consideration Transferred Value, Number of Trading Days
Number of trading days for validation of consideration transferred of business combination.
Financing Receivable, Modified [Table Text Block]
Core Deposits [Member]
Financing Receivable, Modified [Table]
plbc_BusinessCombinationRecognizedAssetAcquiredOtherAssetCurrentAndNoncurrent
Other assets
Amount of asset acquired in business combination and recognized at acquisition date.
plbc_BusinessCombinationRecognizedAssetAcquiredAssetIncludingGoodwill
Total identifiable assets acquired
Amount of asset including goodwill acquired in business combination and recognized at acquisition date.
plbc_BusinessCombinationRecognizedLiabilityAssumedFHLBBorrowing
FHLB borrowings
Amount of FHLB borrowing assumed in business combination and recognized at acquisition date.
plbc_BusinessCombinationRecognizedLiabilityAssumedDeposits
Total deposits
Amount of deposits liability assumed in business combination and recognized at acquisition date.
plbc_BusinessCombinationRecognizedLiabilityAssumedOtherLiabilityCurrentAndNoncurrent
Other liabilities
Amount of liability assumed in business combination and recognized at acquisition date, classified as other.
plbc_DeferredTaxLiabilitiesPurchaseAccountingAdjustments
Purchase accounting adjustments
Amount of deferred tax liability attributable to taxable temporary differences from purchase accounting adjustments.
plbc_BusinessCombinationRecognizedLiabilityAssumedSubordinatedDebentures
Subordinated debentures
Amount of subordinated debentures assumed in business combination and recognized at acquisition date.
Finite-Lived Intangible Assets by Major Class [Axis]
plbc_BusinessCombinationRecognizedLiabilityAssumedInterestBearingDepositsSavingsAccounts
Savings accounts
Amount of interest bearing deposits savings accounts assumed in business combination and recognized at acquisition date.
Finite-Lived Intangible Assets, Major Class Name [Domain]
plbc_BusinessCombinationRecognizedLiabilityAssumedInterestBearingDepositsTimeAccounts
Time accounts
Amount of interest bearing deposits, time accounts assumed in business combination and recognized at acquisition date.
plbc_BusinessCombinationRecognizedLiabilityAssumedInterestBearingDepositsMoneyMarketAccounts
Money market accounts
Amount of interest bearing deposits, money market accounts assumed in business combination and recognized at acquisition date.
Purchase Accounting Adjustments
Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to purchase accounting adjustments.
Subordinated debentures
plbc_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentSubordinatedDebentures
This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to subordinated debentures assumed in connection with a business combination for which the initial accounting was incomplete.
Other
plbc_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentOther
This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to other adjustment acquired in connection with a business combination for which the initial accounting was incomplete.
Time Deposits
plbc_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentTimeDeposits
This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to time deposits assumed in connection with a business combination for which the initial accounting was incomplete.
Loans Insured or Guaranteed by Government Authorities [Axis]
Loans Insured or Guaranteed by Government Authorities [Domain]
us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditEnergyRelatedAmount
Acquired Solar ITCs (Investment Tax Credits)
Effective Income Tax Rate Reconciliation [Table]
Net Income:
Assets acquired in acquisition plus goodwill recognized
The value of an asset or business acquired including goodwill in a noncash (or part noncash) acquisition. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.
Net income
Net Income
Net income
Financial Instrument Performance Status [Axis]
Financial Instrument Performance Status [Domain]
Performing Financial Instruments [Member]
Nonperforming Financial Instruments [Member]
Acquired Solar ITCs (Investment Tax Credits), percent
Restricted Stock Units (RSUs) [Member]
Financing Receivable Credit Quality Indicators [Table Text Block]
Financing Receivable, Credit Quality Indicator [Table]
Restricted Stock [Member]
Share-Based Payment Arrangement, Option [Member]
us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
Financing Receivable, Nonaccrual
us-gaap_AffordableHousingProjectInvestmentWriteDownAmount
Investment Program, Proportional Amortization Method, Elected, Impairment Loss
Financial Asset, 30 to 59 Days Past Due [Member]
Financial Asset, 60 to 89 Days Past Due [Member]
Activity in Affordable Housing Program Obligation [Table Text Block]
Financing Receivable, Past Due [Table Text Block]
Financing Receivable, Past Due [Table]
Financial Asset, Aging [Axis]
Tax credits and other tax benefits - decrease in tax expense
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, before Amortization Expense
Financial Asset, Aging [Domain]
Proceeds from sale of vehicles
Business Combination [Text Block]
Business Combination [Table]
us-gaap_PaymentsForProceedsFromLoansAndLeases
Net increase in loans
Long-Term Debt, Type [Axis]
California Franchise Tax Board [Member]
Long-Term Debt, Type [Domain]
us-gaap_PaymentsToAcquireFederalReserveStock
Purchase of Federal Reserve Bank stock
Commercial 1st Deed [Member]
Represents commercial 1st deed.
us-gaap_PaymentsToAcquireFederalHomeLoanBankStock
Purchases of Federal Home Loan Bank stock
SFR 3rd Deed [Member]
Represents SFR third deed.
us-gaap_RelatedPartyDepositLiabilities
Related Party Deposit Liabilities
Cash flows from investing activities:
Financing Receivable, Modified, Financial Effect [Table Text Block]
Tabular disclosure of financial effect of financing receivable modified for debtor experiencing financial difficulty.
Earnings Per Share, Basic, by Common Class, Including Two-Class Method [Table]
Earnings Per Share:
(Decrease) increase in other liabilities
Related Party Transaction [Table]
us-gaap_OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodTax
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Unrealized Gain (Loss) Arising During Period, Tax
Change in fair value hedge
Related Party Transactions Disclosure [Text Block]
(Decrease) increase in accrued interest payable and other liabilities
Schedule of Related Party Transactions [Table Text Block]
us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax
Change in cash flow hedge
Reclassification adjustments for net (gain) loss included in net income
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax
us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax
us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax
Change in available for sale securities
us-gaap_IncomeTaxPaidFederalAfterRefundReceived
Federal
Income Tax Paid, by Individual Jurisdiction [Table]
us-gaap_IncomeTaxPaidStateAndLocalAfterRefundReceived
State and Local
Federal Home Loan Bank dividends
The amount of dividend income in the period on Federal Home Loan Bank stock.
Subordinated Debt [Member]
us-gaap_InterestExpenseOperating
Total interest expense
us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax
Share-Based Payment Arrangement, Expense, after Tax
Compensation cost
Share-Based Payment Arrangement, Expense
Deposits and Repurchase Agreements [Member]
Represents deposits and repurchase agreements.
Federal Reserve Bank Discount Window [Member]
Represents federal reserve bank discount window.
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Income or Comprehensive Income [Extensible Enumeration]
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Cash Flows [Extensible Enumeration]
Related tax effect:
Purchased Credit Deteriorated Loans [Policy Text Block]
Disclosure of accounting policy for purchased credit deteriorated loans.
Total comprehensive income
Total comprehensive income
Current year-to-date other comprehensive income
Federal Reserve Bank Discount Window Program [Member]
Represents Federal Reserve Bank Discount Window Program.
us-gaap_InvestmentProgramProportionalAmortizationMethodElectedIncomeTaxCredit
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit
us-gaap_OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal
Recovery of provision for credit losses
Investment Program, Proportional Amortization Method, Elected [Table]
us-gaap_InvestmentProportionalAmortizationMethodElectedStatementOfFinancialPositionExtensibleEnumeration
Investment, Proportional Amortization Method, Elected, Statement of Financial Position [Extensible Enumeration]
Lease liability
plbc_DeferredTaxAssetLeaseLiability
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from lease liability.
us-gaap_OffBalanceSheetCreditLossLiability
Beginning balance
Ending balance
us-gaap_InvestmentProgramProportionalAmortizationMethodElectedIncomeTaxCreditAndOtherIncomeTaxBenefitBeforeAmortizationStatementOfCashFlowsExtensibleEnumeration
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, before Amortization, Statement of Cash Flows [Extensible Enumeration]
us-gaap_SharesOutstanding
Balance (in shares)
Balance (in shares)
Common stock, shares outstanding (in shares)
Preferred stock, shares outstanding (in shares)
us-gaap_InvestmentProgramProportionalAmortizationMethodElectedIncomeTaxCreditAndOtherIncomeTaxBenefitBeforeAmortizationStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration
Investment Program, Proportional Amortization Method, Elected, Income Tax Credit and Other Income Tax Benefit, before Amortization, Statement of Income or Comprehensive Income [Extensible Enumeration]
Financing Receivable, Allowance for Credit Loss [Table]
us-gaap_IncreaseDecreaseInOtherOperatingAssets
(Increase) decrease in accrued interest receivable and other assets
us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Debt Instrument, Basis Spread on Variable Rate
us-gaap_DebtInstrumentInterestRateStatedPercentage
Debt Instrument, Interest Rate, Stated Percentage
us-gaap_VariableLeaseCost
Variable Lease, Cost
us-gaap_LeaseCost
Lease, Cost
us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent
Operating Lease, Weighted Average Discount Rate, Percent
us-gaap_DebtInstrumentFairValue
Borrowings
Cornerstone [Member]
Represents Cornerstone.
us-gaap_OperatingLeaseCost
Operating Lease, Cost
us-gaap_ShortTermLeaseCost
Short-Term Lease, Cost
Lease liabilities arising from obtaining right-of-use assets
us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1
Operating Lease, Weighted Average Remaining Lease Term (Year)
Effect of change in composition of related parties
Reflects the amount of effect of changes in composition of related parties made to related parties in the form of loan and lease receivables.
us-gaap_DebtInstrumentFaceAmount
Debt Instrument, Face Amount
us-gaap_DividendsCommonStockCash
Cash dividends on common stock
Interim Period, Costs Not Allocable [Table]
Debt Instrument [Axis]
Debt Instrument, Name [Domain]
SIFMA Municipal Swap Rate [Member]
Variable Rate [Domain]
plbc_CollateralDependentLoansLossGainFairValue
Collateral depended loans, total loss
Amount of fair value loss or gain for collateral dependent loans.
Year 2024 [Member]
Represents year 2024.
Schedule of Long-Term Debt Instruments [Table]
plbc_OtherRealEstateOwnedLossGainFairValue
Collateral depended loans, total loss
Amount of fair value loss or gain for other real estate owned.
Each Lease Agreement for Properties Sold and Leased Back [Member]
Represents each lease agreement for Properties sold and leased back.
plbc_OperatingLeaseAnnualRent
Operating Lease, Annual Rent
Amount of annual rent under operating lease.
Stock-based compensation expense
Year 2022 [Member]
Represents year 2022.
Lease Agreement for Properties Sold and Leased Back [Member]
Represents lease agreement for properties sold and leased back.
Amortization - increase in tax expense
Exercise of stock options (in shares)
Options exercised, Shares (in shares)
Vesting of restricted stock units (in shares)
us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited (in shares)
Termination of restricted stock (in shares)
us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Line of Credit Facility, Maximum Borrowing Capacity
Grants of restricted stock (in shares)
Exercise of stock options
Grants of restricted stock
Proceeds from loan sales
Secured Overnight Financing Rate (SOFR) [Member]
Options granted (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod
Options cancelled, Shares (in shares)
Line of Credit Facility, Lender [Domain]
us-gaap_OtherRealEstateOwnedMeasurementInput
Other Real Estate, measurement input
Issuance of common stock (in shares)
Lender Name [Axis]
us-gaap_LiabilitiesAndStockholdersEquity
Total liabilities and shareholders' equity
Reported Value Measurement [Member]
Issuance of common stock
Asset Pledged as Collateral [Member]
Retained earnings
Accumulated other comprehensive loss, net of taxes
Measurement Input, Discount Rate [Member]
Debt Disclosure [Text Block]
Lease Liability
Lease liabilities
Operating Lease, Liability
Income tax benefit of adjustments
us-gaap_IncomeTaxCreditsAndAdjustments
Right-of-use assets
Operating Lease, Right-of-Use Asset
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue
Lessee, Operating Lease, Liability, to be Paid
Equity in undistributed income of bank subsidiary
Equity in undistributed income of bank subsidiary
us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount
Less: Present value discount
Deferred Income Tax Expense (Benefit)
Deferred, Total
Measurement Input Type [Axis]
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree
Year ended December 31, 2028
Measurement Input Type [Domain]
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour
Year ended December 31, 2029
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive
Year ended December 31, 2030
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive
Thereafter
Net Investment in Lease, before Allowance for Credit Loss
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
Year ended December 31, 2026
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo
Year ended December 31, 2027
Valuation Approach and Technique [Axis]
Valuation Approach and Technique [Domain]
Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block]
us-gaap_ShareBasedCompensation
Stock-based compensation expense
Redding, CA [Member]
Represents Redding, CA
Depreciation of premises and equipment and amortization of intangibles
Purchased Financial Assets with Credit Deterioration [Table Text Block]
Tabular disclosure of purchased financial assets with credit deterioration.
plbc_NumberOfBranchesAcquired
Number of Branches Acquired
The number of branches acquired.
Red Bluff, CA [Member]
Represents Red Bluff, CA.
Anderson, CA [Member]
Represents Anderson, CA.
us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments
Accretion of discounts on investments
Agricultural Loans 2 [Member]
Represents agricultural loans 2.
Agricultural Loans 1 [Member]
Represents agricultural loans.
plbc_ImpairmentOfCollateralDependentLoans
Impairment of Collateral Dependent Loans
Represents the impairment of collateral-dependent loans.
plbc_FinancingReceivableAllowanceForCreditLossNonaccrualLoans
Financing Receivable, Allowance for Credit Loss, Nonaccrual Loans
Amount of allowance for credit loss on financing receivable nonaccrual loans. Excludes allowance for financing receivable covered under loss sharing agreement.
plbc_FinancingReceivableExcludingAccruedInterestModifiedSubsequentDefaultNumberOfLoans
Financing Receivable, Excluding Accrued Interest, Modified, Subsequent Default, Number of Loans
Number of loans, excluding accrued interest, of financing receivable with payment default in current period and modified within previous 12 months preceding payment default for debtor experiencing financial difficulty.
plbc_FinancingReceivableExcludingAccruedInterestModifiedSubsequentDefaultPeriodPastDue
Financing Receivable, Excluding Accrued Interest, Modified, Subsequent Default, Period Past Due (Day)
Period past due of financing receivable with payment default in current period and modified within previous 12 months preceding payment default for debtor experiencing financial difficulty.
us-gaap_DepreciationDepletionAndAmortization
Depreciation, Depletion and Amortization
The 2030 Notes [Member]
Represents the 2030 Notes.
The 2035 Notes [Member]
Represents the 2035 Notes.
us-gaap_ReceivablesFairValueDisclosure
Equity lines of credit, fair value
us-gaap_SecuritiesLoanedOrSoldUnderAgreementsToRepurchaseFairValueDisclosure
Repurchase agreements
us-gaap_GainLossOnSaleOfProperties
Gain (Loss) on Sale of Properties
Book value of net assets acquired from Cornerstone
Fair Value, Nonrecurring [Member]
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
Common stock - no par value; 22,500,000 shares authorized; issued and outstanding – 6,958,814 at December 31, 2025 and 5,903,368 at December 31, 2024
Gain on sale of loans held for sale
Gain on sale of loans held for sale
Liabilities assumed in acquisition
Adjustments to reconcile net income to net cash provided by operating activities:
Measurement Frequency [Axis]
Measurement Frequency [Domain]
Fair Value, Recurring [Member]
Common stock, shares authorized (in shares)
Common stock, shares issued (in shares)
Average interest rate during the year
Common stock, par value (in dollars per share)
us-gaap_AssetsSoldUnderAgreementsToRepurchaseCarryingAmounts
Assets Sold under Agreements to Repurchase, Carrying Amount
us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
Common Stock, Capital Shares Reserved for Future Issuance (in shares)
Statistical Measurement [Domain]
Lessee, Lease, Description [Table]
us-gaap_OperatingLeasePayments
Operating Lease, Payments
Maximum [Member]
Minimum [Member]
Weighted Average [Member]
Product and Service [Axis]
Product and Service [Domain]
Statistical Measurement [Axis]
Investment, Name [Domain]
Stock Option Plan 2022 [Member]
This item represents the Stock Option Plan that was established in 2022.
Serial preferred stock - no par value; 10,000,000 shares authorized; none outstanding
Interest expense
Investment, Name [Axis]
Income taxes
Preferred stock, par value (in dollars per share)
Geographical [Axis]
Property, Plant and Equipment Disclosure [Text Block]
Geographical [Domain]
Property, Plant and Equipment [Table Text Block]
S F R 1st Deed [Member]
Represents SFR 1st Deed.
Preferred stock, shares authorized (in shares)
Crops [Member]
Represents crops.
Portion at Fair Value Measurement [Member]
Federal Home Loan Bank of San Francisco [Member]
Nonaccrual with no allowance for credit losses
plbc_FinancingReceivableNonaccrualWithNoAllowanceForCreditLosses
Amortized cost of financing receivable on nonaccrual status with no allowance for credit losses. Excludes net investment in lease.
Estimate of Fair Value Measurement [Member]
Measurement Basis [Axis]
Federal Home Loan Bank Branch [Domain]
Fair Value, Inputs, Level 3 [Member]
S F R 2nd Deed [Member]
Represents SFR 2nd Deed.
Financing Receivable, Collateral Dependent Loans [Table Text Block]
Tabular discloser for collateral dependent loans.
Fair Value Hierarchy and NAV [Domain]
Fair Value, Inputs, Level 1 [Member]
plbc_OtherRealEstateFairValueDisclosure
RE – Residential, fair value
Fair value portion of other real estate.
Federal Home Loan Bank Branch [Axis]
Fair Value, Inputs, Level 2 [Member]
Fair Value Hierarchy and NAV [Axis]
Occupancy and Equipment Expense [Member]
Related to occupancy to equipment expense.
Measurement Input, Manager Adjustments [Member]
Reflects manager adjustments.
Cash flows from operating activities:
Third Party Appraisals [Member]
Represents third party appraisals.
Revenue [Policy Text Block]
Statement [Line Items]
Financing Receivable, Balance of Nonaccrual Loans by Loan Category [Table Text Block]
Tabular disclosure for Financing Receivable, Balance of Nonaccrual Loans by Loan Category.
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Interest Receivable and Other Assets
AOCI Attributable to Parent [Member]
Shareholders' equity:
Schedule of Fair Value, off-Balance-Sheet Risks [Table Text Block]
us-gaap_LoansReceivableFairValueDisclosure
Loans, net
Fair Value, by Balance Sheet Grouping [Table]
Fair Value Disclosures [Text Block]
Fair Value, by Balance Sheet Grouping [Table Text Block]
us-gaap_Liabilities
Total liabilities
Commitments and contingencies (Note 12)
Other liabilities
Schedule of Other Operating Cost and Expense, by Component [Table Text Block]
Counterparty Name [Axis]
Counterparty Name [Domain]
Loans, Net of Unfunded Commitments [Member]
Relating to loans, net of unfunded commitments.
Parent Company [Member]
Consolidated Entities [Axis]
Consolidated Entities [Domain]
Condensed Cash Flow Statement [Table]
Accounting Standards Update [Domain]
Agricultural Loans [Member]
Loan to finance agricultural costs.
us-gaap_EmployeeRelatedLiabilitiesCurrentAndNoncurrent
Employee-related Liabilities
Condensed Balance Sheet Statement [Table]
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Letters of credit
Accounting Standards Update [Axis]
Disposal Group Classification [Axis]
Disposal Group Classification [Domain]
Condensed Cash Flow Statement [Table Text Block]
Condensed Balance Sheet [Table Text Block]
Condensed Income Statement [Table Text Block]
Condensed Income Statement [Table]
Condensed Financial Statements [Table]
Other Income and Other Expense Disclosure [Text Block]
Retained Earnings [Member]
Common Stock Including Additional Paid in Capital [Member]
Commercial and Residential Portfolio Segments [Member]
Portfolio segment of the company's total financing receivables related to commercial and residential receivables.
Borrowings
Borrowings
Equity Components [Axis]
Equity Component [Domain]
us-gaap_LongTermDebt
Long-Term Debt
Stock, Class of Stock [Table]
plbc_BusinessAcquisitionAcquireeShareConversionRatio
Business Acquisition, Acquiree Share Conversion Ratio
Represents the conversion ratio of acquired company's stock to new company stock as part of a business acquisition.
Cornerstone Community Bancorp [Member]
Relating to Cornerstone Community Bancorp.
plbc_BusinessAcquisitionCashPaidToPreventFractionalShares
Business Acquisition, Cash Paid to Prevent Fractional Shares (in dollars per share)
Represents the amount of cash per share paid to prevent fractional shares as part of a business acquisition.
Equipment [Member]
Document Annual Report
Farmland [Member]
Relating to farmland.
Entity Incorporation, State or Country Code
Document Transition Report
Document Financial Statement Error Correction [Flag]
us-gaap_ShortTermBorrowings
Short-Term Debt
Entity Interactive Data Current
Repurchase agreements
Securities Sold under Agreements to Repurchase
Security Exchange Name
Interchange revenue
The amount of interchange revenue during the period.
Title of 12(b) Security
Statement of Income Location, Balance [Axis]
Statement of Income Location, Balance [Domain]
Expected to vest, Shares (in shares)
Number of options outstanding which are expected to vest.
Expected to vest, Weighted average exercise price (in dollars per share)
The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on expected to vest options.
Expected to vest, Weighted average remaining contractual term in years (Year)
Weighted average remaining contractual term for options expected to vest, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.
Expected to vest, Intrinsic value
Amount by which the current fair value of the underlying stock exceeds the exercise price of options expected to vest.
Statement [Table]
us-gaap_QualifiedAffordableHousingProjectInvestmentsCommitment
Investment Program, Proportional Amortization Method, Elected, Commitment
us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent
Net unrealized holding gain
us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1
Income tax effect
Income Statement [Abstract]
Disposal Group Name [Axis]
Disposal Group Name [Domain]
Change in fair value hedge
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Unrealized Gain (Loss) Arising During Period, before Tax
us-gaap_Deposits
Total deposits
Change in cash flow hedge
us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax
Reclassification adjustments for net (gain) loss included in net income
Interest bearing
Interest-bearing deposits
Non-interest bearing
Accounting Standards Update and Change in Accounting Principle [Table]
us-gaap_TimeDeposits
Time Deposits
Time deposits
Money market
us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax
Savings
Other Commitments [Table]
Change in available for sale securities
Deposits:
us-gaap_StockholdersEquity
Total shareholders' equity
Balance
Balance
us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
Investment securities available for sale, gross unrealized losses
Investment securities available for sale, gross unrealized gains
After one year through five years, amortized cost
After five years through ten years, amortized cost
After ten years, amortized cost