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Note 17 - Related Party Transactions (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Majority Shareholder [Member] | Tractors [Member] |  |  |
Note 17 - Related Party Transactions (Details) [Line Items] |  |  |
Proceeds from Sale of Productive Assets | $ 750,000 us-gaap_ProceedsFromSaleOfProductiveAssets / us-gaap_PropertyPlantAndEquipmentByTypeAxis = ptsi_TractorsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember |  |
Majority Shareholder [Member] | Physical Damage Coverage [Member] |  |  |
Note 17 - Related Party Transactions (Details) [Line Items] |  |  |
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party | 2,597,000 us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionAxis = ptsi_PhysicalDamageCoverageMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember | 2,036,000 us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionAxis = ptsi_PhysicalDamageCoverageMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember | 1,590,000 us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionAxis = ptsi_PhysicalDamageCoverageMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember
Majority Shareholder [Member] | Auto Liability Coverage [Member] |  |  |
Note 17 - Related Party Transactions (Details) [Line Items] |  |  |
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party | 9,464,000 us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionAxis = ptsi_AutoLiabilityCoverageMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember | 9,461,000 us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionAxis = ptsi_AutoLiabilityCoverageMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember | 9,235,000 us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionAxis = ptsi_AutoLiabilityCoverageMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember
Majority Shareholder [Member] | General Liability Coverage [Member] |  |  |
Note 17 - Related Party Transactions (Details) [Line Items] |  |  |
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party | 22,000 us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionAxis = ptsi_GeneralLiabilityCoverageMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember | 22,000 us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionAxis = ptsi_GeneralLiabilityCoverageMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember | 22,000 us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionAxis = ptsi_GeneralLiabilityCoverageMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember
Majority Shareholder [Member] | Workers’ Compensation Coverage [Member] |  |  |
Note 17 - Related Party Transactions (Details) [Line Items] |  |  |
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party | 267,000 us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionAxis = ptsi_WorkersCompensationCoverageMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember | 254,000 us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionAxis = ptsi_WorkersCompensationCoverageMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember | 84,000 us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionAxis = ptsi_WorkersCompensationCoverageMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember
Majority Shareholder [Member] | Freight Transportation [Member] |  |  |
Note 17 - Related Party Transactions (Details) [Line Items] |  |  |
Accounts Receivable, Related Parties | 2,544,000 us-gaap_AccountsReceivableRelatedParties / us-gaap_ProductOrServiceAxis = ptsi_FreightTransportationMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember |  |
Majority Shareholder [Member] | Maintenance Performed and Charges Paid to Third Parties on Behalf of Their Affiliate and Charged Back [Member] |  |  |
Note 17 - Related Party Transactions (Details) [Line Items] |  |  |
Accounts Receivable, Related Parties | 42,000 us-gaap_AccountsReceivableRelatedParties / us-gaap_ProductOrServiceAxis = ptsi_MaintenancePerformedAndChargesPaidToThirdPartiesOnBehalfOfTheirAffiliateAndChargedBackMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember |  |
Majority Shareholder [Member] | Property Lease Charges [Member] |  |  |
Note 17 - Related Party Transactions (Details) [Line Items] |  |  |
Accounts Receivable, Related Parties | 12,000 us-gaap_AccountsReceivableRelatedParties / us-gaap_ProductOrServiceAxis = ptsi_PropertyLeaseChargesMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember |  |
Majority Shareholder [Member] |  |  |
Note 17 - Related Party Transactions (Details) [Line Items] |  |  |
Revenue from Related Parties | 13,253,000 us-gaap_RevenueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember | 10,350,000 us-gaap_RevenueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember | 3,298,000 us-gaap_RevenueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember
Related Party Transaction, Expenses from Transactions with Related Party | 1,440,000 us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember | 1,303,000 us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember | 1,313,000 us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember
Due from Related Parties | 2,598,000 us-gaap_DueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember | 3,852,000 us-gaap_DueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember |
Due to Related Parties | 971,000 us-gaap_DueToRelatedPartiesCurrentAndNoncurrent / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember | 303,000 us-gaap_DueToRelatedPartiesCurrentAndNoncurrent / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember |
Insurance Premiums Paid in Excess of Amounts Earned [Member] |  |  |
Note 17 - Related Party Transactions (Details) [Line Items] |  |  |
Accounts Receivable, Related Parties | $ 1,624,000 us-gaap_AccountsReceivableRelatedParties / us-gaap_ProductOrServiceAxis = ptsi_InsurancePremiumsPaidInExcessOfAmountsEarnedMember | $ 0 us-gaap_AccountsReceivableRelatedParties / us-gaap_ProductOrServiceAxis = ptsi_InsurancePremiumsPaidInExcessOfAmountsEarnedMember |

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