Document And Entity Information
Note To Financial Statement Details Textual
Statistical Measurement [Axis]
Significant Accounting Policies
Note 3 - Investment Securities Available for Sale
Provision for Income Taxes
Common stock retired in connection with the exercise of stock options
The fair value of stock retired in noncash financing activities.
ecd_NonRule10b51ArrTrmntdFlag
Non-Rule 10b5-1 Arrangement Terminated [Flag]
Note 4 - Loans and the Allowance for Credit Losses
ecd_NonRule10b51ArrAdoptedFlag
Non-Rule 10b5-1 Arrangement Adopted [Flag]
Note 6 - Earnings per Share
Trading Arrangements, by Individual [Table]
Note 7 - Stock-based Compensation
Material Terms of Trading Arrangement [Text Block]
Note 9 - Fair Value Measurement
Note 10 - Other Comprehensive Loss
Financial Instrument [Axis]
Note 11 - Business Combinations - Acquisition of Conerstone Community Bancorp
Investment in Debt and Equity Securities and Other Trading Assets [Text Block]
Note 3 - Investment Securities Available for Sale - Amortized Cost and Estimated Fair Value of Investment Securities (Details)
Note 3 - Investment Securities Available for Sale - Investment Securities With Unrealized Losses (Details)
Note 3 - Investment Securities Available for Sale - Investment Securities by Contractual Maturity (Details)
us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
Investment securities available for sale, gross unrealized losses
Minimum [Member]
Note 4 - Loans and the Allowance for Credit Losses - Outstanding Loans (Details)
Investment securities available for sale, gross unrealized gains
Note 4 - Loans and the Allowance for Credit Losses - Loan Portfolio Allocated by Internal Risk Ratings (Details)
Statistical Measurement [Domain]
Note 4 - Loans and the Allowance for Credit Losses - Balance of Nonaccrual Loans By Loan Category (Details)
Maximum [Member]
Note 4 - Loans and the Allowance for Credit Losses - Reversal of Accrued Interest (Details)
Note 4 - Loans and the Allowance for Credit Losses - Loan Modifications (Details)
Note 4 - Loans and the Allowance for Credit Losses - Financial Effect of Loan Modifications (Details)
Pro Forma [Member]
Note 4 - Loans and the Allowance for Credit Losses - Allocation of the Allowance for Credit Losses (Details)
Note 4 - Loans and the Allowance for Credit Losses - Reserve for Unfunded Commitments (Details)
Note 4 - Loans and the Allowance for Credit Losses - Aging Analysis of the Loan Portfolio (Details)
Note 4 - Loans and the Allowance for Credit Losses - Collateral Dependent Loans (Details)
Note 6 - Earnings per Share - Basic and Diluted Earnings Per Share (Details)
Note 7 - Stock-based Compensation - Valuation Assumptions (Details)
Note 7 - Stock-based Compensation - Stock Option Activity (Details)
Note 7 - Stock-based Compensation - Stock Option Plan Cost (Details)
Note 9 - Fair Value Measurements - Carrying Amounts and Estimated Fair Values of Financial Instruments (Details)
Note 9 - Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details)
Note 9 - Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Non-recurring Basis (Details)
Note 9 - 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 10 - Other Comprehensive Loss - Changes in OCI (Details)
Note 11 - Business Combinations - Acquisition of Conerstone Community Bancorp - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Details)
Note 11 - Business Combinations - Acquisition of Conerstone Community Bancorp - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Details) (Parentheticals)
Note 11 - Business Combinations - Acquisition of Conerstone Community Bancorp - Schedule of PCD Loans (Details)
Note 11 - Business Combinations - Acquisition of Conerstone Community Bancorp - Pro Forma (Details)
Notes To Financial Statements
Notes To Financial Statements [Abstract]
Debt Securities, Available-for-Sale [Table]
Options cancelled, Weighted average exercise price (in dollars per share)
Options granted, Weighted average exercise price (in dollars per share)
Options exercised, Weighted average exercise price (in dollars per share)
Salaries and employee benefits
us-gaap_DividendsCommonStockCash
Cash dividends on common stock
Land [Member]
Financial Instruments [Domain]
Cash dividends on common stock, per share (in dollars per share)
Asset Pledged as Collateral [Member]
Weighted Average [Member]
Redding, California [Member]
Redding, California
us-gaap_SharesOutstanding
Balance (in shares)
Balance (in shares)
us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions
us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions
12 months or more fair value
(Decrease) increase in accrued interest payable and other liabilities
Less than 12 months fair value
Award Type [Axis]
Adjustments to reconcile net income to net cash provided by operating activities:
Plan Name [Axis]
us-gaap_Liabilities
Total liabilities
Interest Income:
Plan Name [Domain]
Compensation cost
Share-Based Payment Arrangement, Expense
Accretion of discount on loans
Accretion of discount on loans
Amount of accretion of discounts on loans.
us-gaap_LiabilitiesAndStockholdersEquity
Total liabilities and shareholders’ equity
Pledged Status [Domain]
Accretion of premium on time deposits acquired
Accretion of premium on time deposits
Amount of accretion of premium on time deposits.
Pledged Status [Axis]
Amortization of discount on subordinated debentures
Amortization of discount on subordinated debentures
Amount of accretion of discounts on subordinated debentures.
plbc_OtherRealEstateOwnedAndReceivablesFairValue
Other Real Estate Owned and Receivables, Fair Value
Fair value portion of other real estate owned and receivables.
plbc_OtherRealEstateOwnedAndReceivablesLossGainFairValue
Total, total loss
Amount of fair value loss or gain for other real estate owned and receivables.
us-gaap_ShareBasedCompensation
Stock-based compensation expense
plbc_ReceivablesLossGainFairValueDisclosure
Equity lines of credit, total loss
Amount of fair value loss or gain for receivables.
Tax benefit associated with compensation cost
Livestock [Member]
Represents livestock.
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.
plbc_ReceivablesMeasurementInput
Equity lines of credit, measurement input
Value of input used to measure receivables.
Reclassification of net gain (loss) is included in net income
us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax
Less: reclassification adjustments for net (gain) loss included in net income
us-gaap_FiniteLivedIntangibleAssetUsefulLife
Finite-Lived Intangible Asset, Useful Life (Year)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Portion at Fair Value Measurement [Member]
Reported Value Measurement [Member]
Fair Value, by Balance Sheet Grouping [Table]
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
Increase (decrease) in cash and cash equivalents
SFR Property and Agricultural Land [Member]
Represents SFR Property and Agricultural Land.
Estimate of Fair Value Measurement [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.
plbc_BusinessCombinationConsiderationTransferredValueNumberOfTradingDays
Business Combination, Consideration Transferred Value, Number of Trading Days
Number of trading days for validation of consideration transferred of business combination.
plbc_BusinessCombinationRecognizedAssetAcquiredOtherAssetCurrentAndNoncurrent
Other assets
Amount of asset acquired in business combination and recognized at acquisition date.
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
Cash and Cash Equivalents at Beginning of Period
Cash and Cash Equivalents at End of Period
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.
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.
Statement [Table]
plbc_BusinessCombinationRecognizedLiabilityAssumedSubordinatedDebentures
Subordinated debentures
Amount of subordinated debentures assumed in business combination and recognized at acquisition date.
Reclassification, Comparability Adjustment [Policy Text Block]
plbc_BusinessCombinationRecognizedLiabilityAssumedInterestBearingDepositsSavingsAccounts
Savings accounts
Amount of interest bearing deposits savings accounts assumed in business combination and recognized at acquisition date.
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.
Credit Facility [Axis]
us-gaap_TimeDeposits
Time deposits
Credit Facility [Domain]
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.
Accrued interest payable and other liabilities
Total unrealized losses
Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block]
us-gaap_LoansReceivableFairValueDisclosure
Loans, net
Lease liabilities arising from obtaining right-of-use assets
Total fair value
Proceeds from principal repayments from available-for-sale 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).
Equipment [Member]
us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions
Nature of Operations [Text Block]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)
Financing Receivable, Past Due [Table Text Block]
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)
us-gaap_SecuritiesLoanedOrSoldUnderAgreementsToRepurchaseFairValueDisclosure
Repurchase agreements
Financing Receivable Credit Quality Indicators [Table Text Block]
Financing Receivable, Modified [Table Text Block]
Product and Service [Domain]
Product and Service [Axis]
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount
Weighted-average fair value of options granted during the six months ended June 30, 2026 (in dollars per share)
Tax benefit from option exercises
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod
Options cancelled, Shares (in shares)
Intrinsic value of options exercised
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)
Options exercisable, Shares (in shares)
Options exercisable, Weighted average exercise price (in dollars per share)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Options outstanding, Shares (in shares)
Options outstanding, Shares (in shares)
Assets
Measurement Frequency [Axis]
Commitments and Contingencies Disclosure [Text Block]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Options outstanding, Weighted average exercise price (in dollars per share)
Options outstanding, Weighted average exercise price (in dollars per share)
Statement [Line Items]
Options outstanding, Intrinsic value
Fair Value Hierarchy and NAV [Axis]
Common stock, issued (in shares)
Award Type [Domain]
Common stock, outstanding (in shares)
Weighted-average risk free interest rate
Common stock, authorized (in shares)
Weighted-average annualized volatility
Weighted-average dividend yields
Commercial 1st Deed [Member]
Represents commercial 1st deed.
SFR 3rd Deed [Member]
Represents SFR third deed.
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table]
Common stock, no par value; 22,500,000 shares authorized; issued and outstanding – 6,963,616 shares at June 30, 2026 and 6,958,814 at December 31, 2025
Financing Receivable, Modified, Financial Effect [Table Text Block]
Tabular disclosure of financial effect of financing receivable modified for debtor experiencing financial difficulty.
Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block]
Short-Term Debt, Type [Domain]
us-gaap_MortgageLoansInProcessOfForeclosureAmount
Mortgage Loans in Process of Foreclosure, Amount
us-gaap_PolicyTextBlockAbstract
Accounting Policies
us-gaap_DisclosureTextBlockAbstract
Notes to Financial Statements
us-gaap_TableTextBlock
Notes Tables
Comprehensive Income (Loss) Note [Text Block]
Short-Term Debt, Type [Axis]
Current quarter-to-date other comprehensive income
Total comprehensive income
us-gaap_ShortTermBorrowings
Short-Term Debt
Significant Accounting Policies [Text Block]
Proceeds from matured and called available-for-sale securities
Options outstanding, Weighted average remaining contractual term in years (Year)
Lease liabilities
Construction Loans [Member]
Weighted-average expected life of stock options (in years) (Year)
Options exercisable, Weighted average remaining contractual term in years (Year)
Deposits and Repurchase Agreements [Member]
Represents deposits and repurchase agreements.
Standby Letters of Credit [Member]
us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent
Net unrealized holding gain
Related tax effect:
Other comprehensive income:
Statement of Stockholders' Equity [Abstract]
Intangible Asset, Finite-Lived, Class [Axis]
Extended Maturity [Member]
Proceeds from sale of other real estate
Federal Reserve Bank Discount Window Program [Member]
Represents Federal Reserve Bank Discount Window Program.
Loss Contingency Nature [Axis]
Loan Restructuring Modification [Axis]
Statement of Comprehensive Income [Abstract]
Intangible Asset, Finite-Lived, Class [Domain]
Loan Restructuring Modification [Domain]
Statement of Cash Flows [Abstract]
Financing Receivable Portfolio Segment [Axis]
Shareholders’ equity:
Core Deposits [Member]
Equity Components [Axis]
Unfunded Loan Commitment [Member]
Real Estate Loan [Member]
Financing Receivable Portfolio Segment [Domain]
Cash received from option exercises
Proceeds from exercise of stock options
Equity Component [Domain]
Fair Value Measurements, Nonrecurring [Table Text Block]
Cornerstone [Member]
Represents Cornerstone.
Fair Value, Inputs, Level 2 [Member]
Fair Value, Inputs, Level 3 [Member]
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
CALIFORNIA
Equity [Text Block]
Fair Value, Inputs, Level 1 [Member]
AOCI Attributable to Parent [Member]
Retained Earnings [Member]
Loss Contingency, Nature [Domain]
Financial Instrument Performance Status [Domain]
Premises and equipment, net
Financial Asset, Aging [Axis]
Financial Instrument Performance Status [Axis]
Loans, Total
Loans, amortized cost basis
Loans, Total
Financing Receivable, Current, Allowance for Credit Loss [Table Text Block]
Financial Asset, Aging [Domain]
plbc_CollateralDependentLoansLossGainFairValue
Collateral depended loans, total loss
Amount of fair value loss or gain for collateral dependent loans.
us-gaap_ProvisionForLoanLossesExpensed
Provision for Credit Losses
plbc_OtherRealEstateOwnedLossGainFairValue
Collateral depended loans, total loss
Amount of fair value loss or gain for other real estate owned.
plbc_GainLossOnSaleOfOtherVehicles
Loss on sale of other vehicles
Net gain (loss) during the period on the sale of other vehicles owned.
NEVADA
Provision for (recovery of) credit losses
us-gaap_DebtSecuritiesHeldToMaturityExcludingAccruedInterestBeforeAllowanceForCreditLoss
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss
Financial Asset, 30 to 59 Days Past Due [Member]
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
Stock-based compensation expense
us-gaap_ReclassificationFromAociCurrentPeriodTax
Reclassification from AOCI, Current Period, Tax
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest
Allowance for credit losses
Loans, Balance
Loans, Balance
Financial Asset, 60 to 89 Days Past Due [Member]
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest
Share-Based Payment Arrangement, Cost by Plan [Table Text Block]
Nonaccrual, Interest Income, Cash Basis Method [Member]
Amount of interest income recognized on a cash-basis method of accounting.
Loans, Year Five
Loans, Year Five
plbc_NumberOfSecuritiesSoldForLossDuringThePeriod
Number of Securities Sold for Loss During the Period
Represents the number of securities sold for loss during the period.
Loans, Prior
Loans, Prior
Loans, Year Three
Loans, Year Three
Loans, Year Four
Loans, Year Four
Fair Value Disclosures [Text Block]
Loans, Year One
Loans, Year One
Fair Value, by Balance Sheet Grouping [Table Text Block]
Loans, Year Two
Loans, Year Two
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
plbc_NumberOfSecuritiesSoldForGainDuringThePeriod
Number of Securities Sold for Gain During the Period
Represents the number of securities sold for gain during the period.
Supplemental Disclosure of Cash Flow Information:
Loans, Revolving
Loans, Revolving
Loans, Revolving Converted to Term
Loans, Revolving Converted to Term
us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments
Accretion of investment security discounts
Financing Receivable, Reversal of Accrued Interest Income [Table Text Block]
Tabular disclosure for the reversal of accrued interest income.
us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings
Gain (Loss) on Fair Value Hedges Recognized in Earnings
Collateral Held [Domain]
Collateral Held [Axis]
Proceeds from sale of other vehicles
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_PaymentsToAcquireFederalReserveStock
Purchase of Federal Reserve Bank stock
Federal Reserve Bank Advances [Member]
Other Commitments [Table]
Common stock, no par value (in dollars per share)
Accumulated other comprehensive loss, net
Business Combination, Pro Forma Information [Table]
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Income before provision for income taxes
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.
Segment Reporting, Policy [Policy Text Block]
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Purchase of premises and equipment
Collateral Pledged [Member]
us-gaap_DebtInstrumentFairValue
Borrowings
us-gaap_StockRepurchasedAndRetiredDuringPeriodValue
Repurchase of Common Stock
us-gaap_NoninterestExpense
Total non-interest expenses
Non-Interest Expenses:
Exercise of stock options
Financial Asset, Not Past Due [Member]
Beginning balance
Off-Balance-Sheet, Credit Loss, Liability
Credit Loss, Financial Instrument [Policy Text Block]
Restricted Stock Units (RSUs) [Member]
us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
Exercise of stock options (in shares)
Options exercised, Shares (in shares)
us-gaap_ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent
Vesting of restricted stock units (in shares)
us-gaap_RealEstateAcquiredThroughForeclosure
Real Estate Acquired Through Foreclosure
Class of Stock [Domain]
us-gaap_StockRepurchasedAndRetiredDuringPeriodShares
Repurchase of Common Stock (in shares)
us-gaap_UnusedCommitmentsToExtendCredit
Unused Commitments to Extend Credit
Common Stock Including Additional Paid in Capital [Member]
Redding, CA [Member]
Represents Redding, CA
Cash Flows from Operating Activities:
Purchased Financial Assets with Credit Deterioration [Table Text Block]
Tabular disclosure of purchased financial assets with credit deterioration.
Cash Flows from Investing Activities:
us-gaap_NetCashProvidedByUsedInOperatingActivities
Net cash provided by operating activities
plbc_NumberOfBranchesAcquired
Number of Branches Acquired
The number of branches acquired.
Cash Flows from Financing Activities:
us-gaap_NetCashProvidedByUsedInInvestingActivities
Net cash provided by investing activities
Red Bluff, CA [Member]
Represents Red Bluff, CA.
Anderson, CA [Member]
Represents Anderson, CA.
us-gaap_NetCashProvidedByUsedInFinancingActivities
Net cash provided by (used in) financing activities
plbc_ImpairmentOfCollateralDependentLoans
Impairment of Collateral Dependent Loans
Represents the impairment of collateral-dependent loans.
us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt
Purchases of available-for-sale securities
Proceeds from sale of available-for-sale securities
Proceeds from Sale of Debt Securities, Available-for-Sale
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.
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]
Accounting Policies [Abstract]
Accrued interest receivable and other assets
US States and Political Subdivisions Debt Securities [Member]
Loans, less allowance for credit losses of $19,740 at June 30, 2026 and $19,959 at December 31, 2025
Total net loans
us-gaap_PaymentsForProceedsFromLoansAndLeases
Net decrease (increase) in loans
Measurement Input Type [Axis]
Income Statement [Abstract]
us-gaap_OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal
Provision for credit losses
Investment securities available for sale, Estimated fair value
Investment securities available-for-sale, net of allowance for credit losses of $0 at June 30, 2026 and December 31, 2025
Debt Securities, Available-for-Sale, Excluding Accrued Interest
Debt Securities, Available-for-Sale, Excluding Accrued Interest
us-gaap_AmortizationOfDeferredLoanOriginationFeesNet
Change in deferred loan origination costs/fees, net
Net decrease in securities sold under agreements to repurchase
Net increase in time deposits
Schedule of Available-for-Sale Securities Reconciliation [Table Text Block]
Income tax benefit of adjustments
us-gaap_IncomeTaxCreditsAndAdjustments
Net income
Net income
us-gaap_GainLossOnSaleOfLoansAndLeases
Loans originated for sale
Financial Asset, Past Due [Member]
Amortization of acquired intangibles
Amortization of core deposit intangible
Other Real Estate, Residential Real Estate [Member]
Pertains to the type of other real estate.
Stock Option Plan 2022 [Member]
This item represents the Stock Option Plan that was established in 2022.
Measurement Input Type [Domain]
us-gaap_InterestIncomeExpenseNet
Net interest income before provision for credit losses
S F R 1st Deed [Member]
Represents SFR 1st Deed.
Crops [Member]
Represents crops.
Accumulated Other Comprehensive Income (Loss) [Table]
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.
Income Tax Disclosure [Text Block]
S F R 2nd Deed [Member]
Represents SFR 2nd Deed.
Financing Receivable, Collateral Dependent Loans [Table Text Block]
Tabular discloser for collateral dependent loans.
us-gaap_OtherRealEstateOwnedMeasurementInput
Other Real Estate, measurement input
us-gaap_FinancingReceivableNonaccrualInterestIncome
Financing Receivable, Nonaccrual, Interest Income
plbc_OtherRealEstateFairValueDisclosure
RE – Residential, fair value
Fair value portion of other real estate.
Accounting Standards Update and Change in Accounting Principle [Table]
us-gaap_FinancingReceivablePurchasedWithCreditDeteriorationAmountAtPurchasePrice
Fair Value (Purchase Price)
us-gaap_OtherNoninterestExpense
Other
Measurement Input, Manager Adjustments [Member]
Reflects manager adjustments.
Par value of Acquired PCD Loans
us-gaap_FinancingReceivablePurchasedWithCreditDeteriorationDiscountPremium
Less: Interest Mark (Non-Credit Discount)
Third Party Appraisals [Member]
Represents third party appraisals.
us-gaap_BankOwnedLifeInsuranceIncome
Earnings on bank-owned life insurance
us-gaap_NoninterestIncome
Total non-interest income
Non-Interest Income:
Financing Receivable, Balance of Nonaccrual Loans by Loan Category [Table Text Block]
Tabular disclosure for Financing Receivable, Balance of Nonaccrual Loans by Loan Category.
Fair value of options vested
us-gaap_ReceivablesFairValueDisclosure
Equity lines of credit, fair value
Measurement Basis [Axis]
us-gaap_GainsLossesOnSalesOfOtherRealEstate
Gains (Losses) on Sales of Other Real Estate
Gain on sale of other real estate
Fair Value Hierarchy and NAV [Domain]
us-gaap_NoninterestIncomeOther
Other
Measurement Frequency [Domain]
Statement of Financial Position [Abstract]
us-gaap_RepaymentsOfOtherDebt
Decrease in other borrowings
Income taxes
plbc_PolicyTable
Recoveries
Construction Loan Payable [Member]
us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff
Charge-offs
Loans, Total, Write-offs
Charge-offs
Deferred tax asset (tax effect of purchase accounting adjustments at 29.56% plus tax on cash paid on termination of stock options)
Fair Value, Nonrecurring [Member]
Fair Value, Recurring [Member]
Loans, Net of Unfunded Commitments [Member]
Relating to loans, net of unfunded commitments.
us-gaap_PaymentsForRepurchaseOfCommonStock
Repurchase of common stock
us-gaap_IncreaseDecreaseInOtherOperatingAssets
Decrease (increase) in accrued interest receivable and other assets
Document Type
Document Information [Line Items]
Document Quarterly Report
Automobile Loan [Member]
us-gaap_FinancingReceivablePurchasedWithCreditDeteriorationAllowanceForCreditLossAtAcquisitionDate
Less Credit Mark (ACL)
Document Information [Table]
us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)
Net Interest Income
us-gaap_BusinessAcquisitionsProFormaRevenue
Agricultural Loans [Member]
Loan to finance agricultural costs.
Entity Interactive Data Current
us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
Business Combination, Consideration Transferred, Equity Interest, Share Issued, Number of Shares (in shares)
Bank owned life insurance
Document Transition Report
us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Diluted shares (in shares)
us-gaap_GainLossOnSaleOfInvestments
Net gain on sale of investment securities
Effect of dilutive stock options and restricted stock (in shares)
Net Income
us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss
Basic shares (in shares)
Basic earnings per share (in dollars per share)
Past due 90 days or more and still accruing
us-gaap_FinancingReceivableExcludingAccruedInterest90DaysOrMorePastDueStillAccruing
90 Days and Still Accruing
Earnings Per Share, Basic, by Common Class, Including Two-Class Method [Table]
Total nonaccrual
us-gaap_FinancingReceivableExcludingAccruedInterestNonaccrual
Nonaccrual
Effective Income Tax Rate Reconciliation [Table]
Interest bearing
us-gaap_Deposits
Total deposits
Deposits:
Core deposit intangible
Non-interest bearing
Depreciation of premises and equipment and amortization of intangibles
Document Fiscal Period Focus
Pledging Purpose [Axis]
Document Fiscal Year Focus
Pledging Purpose [Domain]
Commercial and Residential Portfolio Segments [Member]
Portfolio segment of the company's total financing receivables related to commercial and residential receivables.
Amendment Flag
Financing Receivable, Past Due [Table]
Deferred loan costs, net
us-gaap_DebtSecuritiesAvailableForSaleRealizedGain
Debt Securities, Available-for-Sale, Realized Gain
Goodwill recognized
Goodwill
Document Period End Date
Options granted (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)
Residential Portfolio Segment [Member]
Legal Entity [Axis]
us-gaap_InterestAndDividendIncomeOperating
Total interest income
Consumer Portfolio Segment [Member]
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Table]
Commercial Portfolio Segment [Member]
Business Combination [Domain]
Entity File Number
Entity Tax Identification Number
Supplemental noncash disclosures
Business Combination [Axis]
Less than 12 months unrealized losses
12 months or more unrealized losses
Entity [Domain]
Entity Central Index Key
Entity Registrant Name
Performing Financial Instruments [Member]
Entity Current Reporting Status
us-gaap_DebtSecuritiesAvailableForSaleRealizedLoss
Debt Securities, Available-for-Sale, Realized Loss
Business Combination [Table]
Special Mention [Member]
us-gaap_DebtSecuritiesAvailableForSaleRealizedGainLoss
Debt Securities, Available-for-Sale, Realized Gain (Loss)
Substandard [Member]
Entity Incorporation, State or Country Code
Business Combination, Pro Forma Information [Table Text Block]
Pass [Member]
Current Fiscal Year End Date
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
Cash and cash equivalents
us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1
Income tax effect
Entity Filer Category
Entity Shell Company
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
Total liabilities assumed
Entity Emerging Growth Company
Other comprehensive income
Other comprehensive loss
Other comprehensive (loss) income
Nonperforming Financial Instruments [Member]
Entity Small Business
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.
Valuation Approach and Technique [Axis]
Cornerstone Community Bancorp [Member]
Relating to Cornerstone Community Bancorp.
us-gaap_DebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainLossBeforeTax
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain (Loss), before Tax
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
Core deposit intangible
Fair value of net identifiable assets acquired from Cornerstone
Net identifiable assets
Less: fair value of net assets acquired from Cornerstone
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.
Financing Receivable, Modified [Table]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
Bank premises and equipment
Interest Expense:
plbc_NumberOfMortgageLoansInProcessOfForeclosure
Number of Mortgage Loans in Process of Foreclosure
The number of mortgage loans in process of foreclosure.
Farmland [Member]
Relating to farmland.
Valuation Approach and Technique [Domain]
Merger consideration (cash payments of $16.1 million and $45.2 million in stock)
Business Combination, Consideration Transferred
Interest on deposits
Entity Address, State or Province
Entity Address, City or Town
Retained earnings
us-gaap_InterestExpenseOperating
Total interest expense
Entity Address, Address Line One
City Area Code
After one year through five years, amortized cost
After five years through ten years, amortized cost
Occupancy and equipment
This item represents occupancy and equipment expense.
Local Phone Number
Within one year, amortized cost
Entity Address, Postal Zip Code
Borrowings
Interchange revenue
The amount of interchange revenue during the period.
Investment securities not due at a single maturity date, estimated fair value
Title of 12(b) Security
Security Exchange Name
After five years through ten years, estimated fair value
Trading Symbol
After ten years, estimated fair value
Within one year, fair value
After one year through five years, estimated fair value
After ten years, amortized cost
Class of Stock [Axis]
Investment securities not due at a single maturity date, amortized cost
Class of Financing Receivable [Axis]
Class of Financing Receivable [Domain]
Total purchase accounting adjustments
us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred
Core deposit intangible asset
us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles
Entity Common Stock, Shares Outstanding
Bank premises and equipment
us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentPropertyPlantAndEquipment
Earnings Per Share [Text Block]
plbc_NumberOfSecuritiesSoldDuringPeriod
Number of Securities Sold During Period
This item represents the number of securities sold during the period.
Financing Receivable, Credit Quality Indicator [Table]
us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax
Change in net unrealized loss on securities
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process
Loans
Change in net unrealized loss on securities
us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax
Internal Credit Assessment [Axis]
us-gaap_InterestExpenseOther
Other
Interest on borrowings
us-gaap_InterestExpenseShortTermBorrowings
us-gaap_BusinessCombinationAcquisitionRelatedCosts
Business Combination, Acquisition-Related Cost, Expense
Scenario [Axis]
us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss
Net interest income after provision for credit losses
Scenario [Domain]
Options 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.
Investments Classified by Contractual Maturity Date [Table Text Block]
Options exercisable, Intrinsic value
Internal Credit Assessment [Domain]
Options 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.
Equity issuance
us-gaap_Assets
Assets
Total assets
Cash and cash equivalents
us-gaap_CashAndCashEquivalentsAtCarryingValue
Interest and fees on loans
us-gaap_OtherInterestAndDividendIncome
Other
Geographical [Domain]
Geographical [Axis]
plbc_DeferredLoanOriginationCosts
Deferred Loan Origination Costs
This item represents loan origination costs that have been deferred.
Modified
Modified
us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
Common Stock, Capital Shares Reserved for Future Issuance (in shares)
Real estate – commercial% of total segment financing receivables
Real estate – commercial% of total segment financing receivables
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.
Interest on investment securities
plbc_NumberOfBranches
Number of Branches
Represents the number of branches operated by a bank.
Diluted earnings per share (in dollars per share)
plbc_ImpairedLoansFairValue
Collateral dependent loans, fair value
Represents fair value portion of impaired loans.
us-gaap_FinancingReceivableExcludingAccruedInterestModifiedSubsequentDefault
Financing Receivable, Excluding Accrued Interest, Modified, Subsequent Default
plbc_ImpairedLoansMeasurementInput
Collateral dependent loans, measurement input
Value of input used to measure impaired loans.
Commercial Loans [Member]
This item represents commercial loans.
Cash payment
Payments to Acquire Businesses, Gross
Equity Lines of Credit [Member]
This item represents loans classified as equity lines of credit.
Other Loans [Member]
This item represents all other loans not classified separately.
Weighted average term extension (Month)
us-gaap_FinancingReceivableModifiedWeightedAverageTermIncreaseFromModification
Accounts and Financing Receivables [Table]
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
Book value of net assets acquired from Cornerstone
Consolidation, Policy [Policy Text Block]
Stock Option Plan 2013 [Member]
This item represents the Stock Option Plan that was established in 2013.
Interest expense
Amortization of investment security premiums
us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearWriteoff
Loans, Prior, Write-offs
us-gaap_FinancingReceivableExcludingAccruedInterestRevolvingWriteoff
Loans, Revolving, Write-offs
us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYearWriteoff
Loans, Year Four, Write-offs
Service [Member]
us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYearWriteoff
Loans, Year Five, Write-offs
us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearWriteoff
Loans, Year Two, Write-offs
us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearWriteoff
Loans, Year Three, Write-offs
us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYearWriteoff
Loans, Year One, Write-offs
Repurchase agreements
Real Estate Properties [Domain]
Business Combination [Text Block]
us-gaap_FinancingReceivableExcludingAccruedInterestRevolvingConvertedToTermLoanWriteoff
Loans, Revolving Converted to Term, Write-offs
Real Estate Property Ownership [Axis]
us-gaap_StockholdersEquity
Total shareholders’ equity
Balance
Balance
Net increase (decrease) in demand, interest bearing and savings deposits
This item represents the net increase (decrease) in demand, interest bearing and savings deposits.
Real estate and vehicles acquired through foreclosure/repossession
This item represents the value of real estate and vehicles acquired through foreclosure.
us-gaap_NumberOfRealEstateProperties
Number of Real Estate Properties
us-gaap_PaymentsOfDividendsCommonStock
Cash dividends paid on common stock
Interest income reversed
Stock, Class of Stock [Table]
Nature of Operation, Product Information, Concentration of Risk [Table]
Right-of-use assets
ecd_Rule10b51ArrTrmntdFlag
Rule 10b5-1 Arrangement Terminated [Flag]
ecd_Rule10b51ArrAdoptedFlag
Rule 10b5-1 Arrangement Adopted [Flag]
Revenue
Commitments and contingencies (Note 5)