Document And Entity Information Statistical Measurement [Axis] Note To Financial Statement Details Textual srt_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased Stock Repurchase Program, Number of Shares Authorized to be Repurchased (in shares) Note D - Marketable Equity Securities Note E - Stock-based Compensation us-gaap_IncomeTaxExpenseBenefit Total federal and state income tax (benefit)/expense ecd_NonRule10b51ArrTrmntdFlag Non-Rule 10b5-1 Arrangement Terminated [Flag] Note F - Segment Information ecd_NonRule10b51ArrAdoptedFlag Non-Rule 10b5-1 Arrangement Adopted [Flag] Note H - Earnings Per Share Trading Arrangements, by Individual [Table] Note J - Fair Value of Financial Instruments Material Terms of Trading Arrangement [Text Block] Note M - Leases Note D - Marketable Equity Securities - Securities Classified As Available-for-sale (Details) Note D - Marketable Equity Securities - Unrealized Gains and Losses on Marketable Equity Securities (Details) Investment in Debt and Equity Securities and Other Trading Assets [Text Block] Note D - Marketable Equity Securities - Realized Gains on Marketable Equity Securities (Details) Note E - Stock-based Compensation - Summary of Nonvested Restricted Stock (Details) Minimum [Member] Note F - Segment Information - Segment Revenue Reconciliation (Details) Note H - Earnings Per Share - Computations of Basic and Diluted Earnings Per Share (Details) Statistical Measurement [Domain] Note J - Fair Value of Financial Instruments - Securities Measured at Fair Value on a Recurring Basis (Details) Maximum [Member] Note J - Fair Value of Financial Instruments - Fair Value of Long-term Debt Other Than Lines of Credit (Details) Share Repurchase Program [Axis] Note M - Leases - Maturity of Lease Liabilities (Details) Share Repurchase Program [Domain] Note M - Leases - Lease Cost (Details) Litigation Case [Domain] Note M - Leases - Lease Revenue (Details) Note M - Leases - Lease Receivables (Details) us-gaap_IncreaseDecreaseInAccountsReceivable Accounts receivable Notes To Financial Statements Notes To Financial Statements [Abstract] Trucks under Operating Lease [Member] Information pertaining to trucks under operating lease. Dock Space under Operating Lease [Member] Information pertaining to dock space under operating lease. Common Stock Outstanding [Member] Represents common stock outstanding. us-gaap_EffectiveIncomeTaxRateContinuingOperations Effective Income Tax Rate Reconciliation, Percent Debt Securities, Available-for-Sale [Table] Salaries, wages and benefits us-gaap_IncreaseDecreaseInIncomeTaxesReceivable Income taxes refundable Land Litigation Case [Axis] us-gaap_SharesOutstanding Balance (in shares) Balance (in shares) Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation [Domain] Award Type [Axis] Adjustments to reconcile net loss to net cash provided by (used in) operating activities: Preferred stock, $.01 par value, 10,000,000 shares authorized; none issued Plan Name [Axis] us-gaap_Liabilities Total liabilities Defined Benefit Plan [Table] Plan Name [Domain] Segment Reporting, Reconciliation of Revenue by Segment to Consolidated [Table Text Block] us-gaap_AllocatedShareBasedCompensationExpense Share-Based Payment Arrangement, Expense us-gaap_LiabilitiesAndStockholdersEquity TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY Title and Position [Axis] Segment Reporting [Table] us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets Prepaid expenses, deposits, inventories, and other assets Location, Statement of Financial Position, Balance [Axis] us-gaap_ShareBasedCompensation Stock compensation-net of excess tax benefits us-gaap_IncreaseDecreaseInAccountsPayableTrade Trade accounts payable Lease Contractual Term [Axis] Lease Contractual Term [Domain] Changes in operating assets and liabilities: Preferred stock, issued (in shares) Preferred stock, authorized (in shares) Portion at Fair Value Measurement [Member] Reported Value Measurement [Member] Fair Value, by Balance Sheet Grouping [Table] Preferred stock, par value (in dollars per share) us-gaap_IncreaseDecreaseInAccruedLiabilities Accrued expenses and other liabilities Stock Split To [Member] The ratio of shares representing a stock transaction after the stock split conversion. us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect NET (DECREASE) INCREASE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH Estimate of Fair Value Measurement [Member] Lessor, Lease, Description [Table] us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations CASH, CASH EQUIVALENTS AND RESTRICTED CASH -Beginning of period CASH, CASH EQUIVALENTS AND RESTRICTED CASH -End of period Statement [Table] us-gaap_OperatingLeasePayments Operating Lease, Payments Revenue equipment Prepaid expenses and deposits us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Marketable equity securities Fair market value us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber Non-vested (in shares) Non-vested (in shares) us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue Nonvested - weighted average grant date fair value (in dollars per share) Nonvested - weighted average grant date fair value (in dollars per share) Granted (in shares) Granted - weighted average grant date fair value (in dollars per share) us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod Canceled/forfeited/expired (in shares) Long-Term Debt, Type [Axis] us-gaap_EquitySecuritiesFvNiRealizedGainLoss Realized gain/(loss) Cost us-gaap_LitigationReserve Estimated Litigation Liability Product and Service [Domain] Product and Service [Axis] us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue Vested - weighted average grant date fair value (in dollars per share) us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss Equity Securities, FV-NI, Unrealized Gain (Loss) us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod Vested (in shares) Total undiscounted operating lease payments Weighted-average discount rate for operating leases us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) 2027 us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares) 2026 (remaining) us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] 2029 us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree Commitments and Contingencies Disclosure [Text Block] 2028 us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo Statement [Line Items] Fair Value Hierarchy and NAV [Axis] Common stock, issued (in shares) Common stock, outstanding (in shares) Award Type [Domain] us-gaap_LessorOperatingLeasePaymentsToBeReceived Total future minimum lease payments receivable Common stock, authorized (in shares) Operating Lease, Lease Income [Table Text Block] us-gaap_LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths 2027 us-gaap_LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear 2026 (remaining) us-gaap_LessorOperatingLeasePaymentsToBeReceivedTwoYears 2028 Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Schedule of Realized Gain (Loss) [Table Text Block] Common stock, $.01 par value, 100,000,000 shares authorized; 22,398,415 and 22,377,606 shares issued; 20,942,257 and 20,926,020 shares outstanding at June 30, 2026 and December 31, 2025, respectively Lessor, Operating Lease, Payment to be Received, Maturity [Table Text Block] Accounts payable Short-Term Debt, Type [Domain] us-gaap_PolicyTextBlockAbstract Accounting Policies us-gaap_DisclosureTextBlockAbstract Notes to Financial Statements us-gaap_TableTextBlock Notes Tables Short-Term Debt, Type [Axis] ptsi_LitigationSettlementNetExposureAfterInsuranceConsideration Litigation Settlement, Net Exposure after Insurance Consideration Amount of net exposure after insurance consideration in judgment or settlement of litigation. Sales of marketable equity securities us-gaap_ShortTermBorrowings Short-Term Debt Accrued expenses and other liabilities Concentration Risk Type [Axis] us-gaap_ProceedsFromIssuanceOfLongTermDebt Borrowings of long-term debt us-gaap_ProceedsFromOtherDebt Borrowings under margin account us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount Less: Imputed interest Long-term lease liabilities (recorded in other long-term liabilities) Total operating lease liabilities Present value of operating lease liabilities Operating Lease, Liability Current lease liabilities (recorded in other current liabilities) Fair Value, Assets Measured on Recurring Basis [Table Text Block] Current maturities of long-term debt Concentration Risk Type [Domain] Capitalization, Equity [Table] Long-term debt - less current portion CANADA Shops and Office Space Leases Without Early Cancellation Options [Member] Represents information pertaining to shops and office space leases without early cancellation options. Borrowings under lines of credit Loss Contingencies [Table] Statement of Stockholders' Equity [Abstract] Segment Reporting and Concentration Risk Disclosure [Text Block] The entire disclosure for reporting segments including data and tables and also the entire disclosure of any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date. Statement of Cash Flows [Abstract] Statutory Accounting Practices [Table] STOCKHOLDERS' EQUITY Long-Term Debt, Type [Domain] Product Concentration Risk [Member] us-gaap_LossContingencyEstimateOfPossibleLoss Loss Contingency, Estimate of Possible Loss Equity Components [Axis] ptsi_PaymentsProceedsFromPurchasesOfMarketableEquitySecuritiesNetOfReturnOfCapital Purchases of marketable equity securities Represents the amount of cash outflow or inflow from purchases of marketable equity securities, net of return of capital. Equity Component [Domain] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 3 [Member] Equity [Text Block] Fair Value, Inputs, Level 1 [Member] Additional Paid-in Capital [Member] Retained Earnings [Member] Motor Carrier [Member] Represents information pertaining to the motor carrier segment. Operating supplies and expenses us-gaap_PropertyPlantAndEquipmentNet Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Net property and equipment Compensation and Employee Benefit Plans [Text Block] us-gaap_PropertyPlantAndEquipmentGross Total property and equipment Purchases of property and equipment us-gaap_ProvisionForDoubtfulAccounts Bad debt expense us-gaap_OtherCostOfOperatingRevenue Other Stock based compensation Stock based compensation FEDERAL AND STATE INCOME TAX (BENEFIT)/EXPENSE: Deferred income taxes MEXICO Fair Value Disclosures [Text Block] Fair Value, by Balance Sheet Grouping [Table Text Block] SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION: Current liabilities: Current us-gaap_LiabilitiesCurrent Total current liabilities Trade, less current estimated credit loss of $4,381 and $8,415, respectively Long-term debt us-gaap_LongTermDebtFairValue Marketable equity securities us-gaap_IncomeTaxesPaid Income taxes Lease, Cost [Table Text Block] us-gaap_GainLossOnDispositionOfAssets1 Gain on sale or disposition of assets us-gaap_ProceedsFromSaleOfMachineryAndEquipment Proceeds from sale or disposition of assets Revenue Benchmark [Member] Long-Term Debt [Text Block] us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization Accumulated depreciation us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition Restricted stock net settlement Notes Payable [Member] Represents notes payable. Basis of Accounting [Text Block] us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest LOSS BEFORE INCOME TAXES Additional paid-in capital Unrealized Gain (Loss) on Investments [Table Text Block] us-gaap_PaymentsToAcquirePropertyPlantAndEquipment Purchases of property and equipment UNITED STATES Current assets: Restricted stock issued us-gaap_AssetsCurrent Total current assets Geographic Concentration Risk [Member] Fair Value, Recurring and Nonrecurring [Table] us-gaap_LitigationSettlementAmountAwardedToOtherParty Litigation Settlement, Amount Awarded to Other Party Debt Instrument, Name [Domain] Restricted stock issued (in shares) Depreciation Depreciation us-gaap_TreasuryStockSharesAcquired Treasury Stock, Shares, Acquired (in shares) Treasury stock repurchases (in shares) Schedule of Long-Term Debt Instruments [Table] Debt Instrument [Axis] OPERATING ACTIVITIES: INVESTING ACTIVITIES: us-gaap_NetCashProvidedByUsedInOperatingActivities Net cash (used in) provided by operating activities FINANCING ACTIVITIES: us-gaap_NetCashProvidedByUsedInInvestingActivities Net cash provided by investing activities us-gaap_NetCashProvidedByUsedInFinancingActivities Net cash used in financing activities Accounting Policies [Abstract] Segments [Domain] Accounting Standards Update and Change in Accounting Principle [Text Block] Trade, allowance us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent Segments [Axis] Income Statement [Abstract] us-gaap_NumberOfOperatingSegments Number of Operating Segments us-gaap_NumberOfReportableSegments Number of Reportable Segments Provision for deferred income taxes Deferred The 2024 Plan [Member] Represents the 2024 plan. us-gaap_TreasuryStockCommonValue Treasury Stock, Common, Value Treasury stock, at cost; 1,456,158 and 1,451,586 shares at June 30, 2026 and December 31, 2025, respectively us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased Share Repurchase Program, Remaining Authorized, Number of Shares (in shares) Treasury shares (in shares) Treasury Stock, Common, Shares (in shares) Treasury Stock, Common [Member] Net Loss Net loss NET LOSS us-gaap_IncomeTaxExaminationPenaltiesAndInterestExpense Income Tax Examination, Penalties and Interest Expense OPERATING EXPENSES AND COSTS: Office furniture and equipment Insider Trading Agreement [Table] us-gaap_CostsAndExpenses Total operating expenses and costs Income Tax Disclosure [Text Block] Leases without Early Cancellation Options [Member] Information related to leases without early cancellation options. Restricted Stock [Member] Accounting Standards Update and Change in Accounting Principle [Table] Non-Employee Directors [Member] Represents the non-employee directors. Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation [Axis] us-gaap_TreasuryStockValueAcquiredCostMethod Treasury Stock, Value, Acquired, Cost Method Treasury stock repurchases Other us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1 Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested in Period, Fair Value Measurement Basis [Axis] Fair Value Hierarchy and NAV [Domain] us-gaap_RepaymentsOfLongTermDebt Repayments of long-term debt us-gaap_RepaymentsOfLinesOfCredit Repayments under lines of credit Statement of Financial Position [Abstract] NON-OPERATING INCOME Insurance and claims us-gaap_RepaymentsOfOtherDebt Repayments under margin account Income taxes refundable Other assets Nonmonetary Transaction Type [Domain] Nonmonetary Transaction Type [Axis] us-gaap_PaymentsForRepurchaseOfCommonStock Repurchases of common stock Self Insurance Auto Liability Claims Threshold Amount ptsi_SelfInsuranceAutoLiabilityClaimsThresholdAmount Represents self insurance auto liability claims threshold amount. Document Type us-gaap_LessorOperatingLeaseTermOfContract Lessor, Operating Lease, Term of Contract (Month) Document Information [Line Items] Document Quarterly Report us-gaap_LesseeOperatingLeaseTermOfContract Lessee, Operating Lease, Term of Contract (Year) Revenue, before fuel surcharges, percentage Weighted-average remaining lease term for operating leases (in years) (Year) Document Information [Table] us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment Dilutive effect of common stock equivalents (in shares) Entity Interactive Data Current Document Transition Report Diluted (in shares) Diluted weighted average common shares outstanding (in shares) LOSS PER COMMON SHARE: us-gaap_GainLossOnSaleOfInvestments Gain on marketable equity securities Basic (in shares) Basic weighted average common shares outstanding (in shares) us-gaap_DebtInstrumentTerm Debt Instrument, Term (Month) Basic (in dollars per share) Basic loss per share (in dollars per share) us-gaap_NotesPayable Notes Payable Earnings Per Share, Basic, by Common Class, Including Two-Class Method [Table] September 2011 Reauthorization [Member] Program under which the repurchase of common stock was reauthorized Title and Position [Domain] ptsi_SelfInsuranceAutoClaimsExceedingAmountReserveThreshold Self Insurance Liability Claims, Exceeding Amount Reserve Threshold The minimum amount of expected claims for which claims will be reserved in the reporting period. Structures and improvements Document Fiscal Period Focus Document Fiscal Year Focus us-gaap_StockholdersEquityNoteStockSplitConversionRatio1 Stockholders' Equity Note, Stock Split, Conversion Ratio Amendment Flag Document Period End Date us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) ptsi_AllocatedShareBasedCompensationExpenseImpactOnEarningsPerShareDiluted Allocated Share-based Compensation Expense, Impact on Earnings Per Share, Diluted (in dollars per share) Represents the impact of allocated share-based compensation expense on earnings per share, diluted, during the period. Legal Entity [Axis] Long-term Short-term us-gaap_LeaseCost Total Entity File Number Entity Tax Identification Number NONCASH INVESTING AND FINANCING ACTIVITIES: Disaggregation of Revenue [Table] Entity [Domain] Entity Central Index Key Entity Registrant Name Entity Current Reporting Status Entity Incorporation, State or Country Code Current Fiscal Year End Date Amortization Year 2 [Member] Amortization of stock based compensation in year 2. Lessor, Operating Leases [Text Block] Rent and purchased transportation Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line, and expenses incurred for transportation, during the period. Entity Filer Category Entity Shell Company Property and equipment: Entity Emerging Growth Company Entity Small Business us-gaap_OperatingIncomeLoss OPERATING LOSS Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] us-gaap_ContractWithCustomerAssetNet Contract with Customer, Asset, after Allowance for Credit Loss us-gaap_InterestExpense INTEREST EXPENSE us-gaap_LossContingencyLossInPeriod Loss Contingency Accrual, Loss (Reversal of Loss) OPERATING REVENUES: Entity Address, State or Province Entity Address, City or Town Retained earnings Entity Address, Address Line One City Area Code Local Phone Number Entity Address, Postal Zip Code Revenue from Contract with Customer [Text Block] Title of 12(b) Security Security Exchange Name Noncash Financing [Member] Noncash Financing Trading Symbol 2030 and thereafter ptsi_LesseeOperatingLeaseLiabilityToBePaidYearFourAndThereafter Amount of lessee's undiscounted obligation for lease payment for operating lease due in and after fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Class of Stock [Axis] Financing Through Accounts Payable [Member] Financing Through Accounts Payable Entity Common Stock, Shares Outstanding Earnings Per Share [Text Block] AVERAGE COMMON SHARES OUTSTANDING: Lease Revenue [Member] Represents the lease revenue. Scenario [Axis] The 2014 Stock Option Plan [Member] Represents information pertaining to the 2014 Amended and Restated Stock Option and Incentive Plan. Scenario [Domain] Forecast [Member] Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Income taxes payable us-gaap_IncreaseDecreaseInIncomeTaxes Amortization, Current Year [Member] Represents information pertaining to amortization in the current year. Common stock, par value (in dollars per share) Amortization, Year 3 [Member] Represents information pertaining to amortization in the third year (where the current year is the first year). Amortization, Next Year [Member] Represents information pertaining to amortization in the next year. Amortization, Year 4 [Member] Represents information pertaining to amortization in year 4 (where the current year is year 1). Specific Auto Claim [Member] Represents specific auto claim. us-gaap_Assets TOTAL ASSETS Cash and cash equivalents Truckload Services [Member] Represents information pertaining to truckload services. Geographical [Domain] Geographical [Axis] Accounts receivable-net: Brokerage and Logistics Services [Member] Represents information pertaining to brokerage and logistics services. Diluted (in dollars per share) Diluted loss per share (in dollars per share) us-gaap_ContractWithCustomerLiability Contract with Customer, Liability Debt Securities, Trading, and Equity Securities, FV-NI [Table] Equipment Financing [Member] Debt used as equipment financing. us-gaap_InvestmentIncomeDividend Investment Income, Dividend Fuel Surcharge [Member] Represents the information pertaining to fuel surcharge. us-gaap_InterestPaidNet Interest Freight Transportation Service [Member] Freight transport is the physical process of transporting commodities and merchandise goods and cargo. Margin Account Borrowings [Member] Margin debt is debt a brokerage customer takes on by trading on margin. When purchasing securities through a broker, investors have the option of using a cash account and covering the entire cost of the investment themselves, upfront, or using a margin account, meaning they borrow part of the initial capital from their broker. The portion the investors borrows is known as margin debt; the portion they fund themselves is the margin, or equity (not to be confused with the securities the customer is trading, which may themselves be equities). Federal Income Tax Note [Table] Net unrealized gain Unrealized gain The amount of accumulated unrealized gain (loss) on equity securities. ptsi_EquitySecuritiesCostOfSecuritiesSold Cost of securities sold The cost of securities that sold during the period. Gross unrealized losses ptsi_EquitySecuritiesFVNIAccumulatedUnrealizedLoss The amount of accumulated gross unrealized loss on equity securities. Gross unrealized gains ptsi_EquitySecuritiesFVNIAccumulatedUnrealizedGain The amount of accumulated gross unrealized gain on equity securities. Inventories ptsi_EquitySecuritiesSaleProceeds Sales proceeds The total amount of proceeds received for the sale of equity securities. us-gaap_StockholdersEquity Total stockholders’ equity Balance Balance us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue Canceled/forfeited/expired - weighted average grant date fair value (in dollars per share) ptsi_LessorOperatingLeasePaymentsToBeReceivedYearThreeAndThereafter 2029 and thereafter Amount of lease payment to be received by lessor for operating lease in third fiscal year and thereafter following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Concentration Risk Benchmark [Axis] us-gaap_PaymentsForLegalSettlements Payments for Legal Settlements Concentration Risk Benchmark [Domain] Right-of-use assets (recorded in other non-current assets) Other long-term liabilities ecd_Rule10b51ArrTrmntdFlag Rule 10b5-1 Arrangement Terminated [Flag] ecd_Rule10b51ArrAdoptedFlag Rule 10b5-1 Arrangement Adopted [Flag] Operating revenues Marketable Securities [Table Text Block]