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Note E - Segment Information (Details) - Segment Revenue Reconciliation (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Segment Reporting, Revenue Reconciling Item [Line Items]    
Revenue, before fuel surcharge $ 82,684us-gaap_CargoAndFreightRevenue $ 74,896us-gaap_CargoAndFreightRevenue
Truckload Services [Member] | Product Concentration Risk [Member] | Sales Revenue, Segment [Member]    
Segment Reporting, Revenue Reconciling Item [Line Items]    
Percentage of revenue, before fuel surcharges 87.70%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueSegmentMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_ProductConcentrationRiskMember
/ us-gaap_StatementBusinessSegmentsAxis
= ptsi_TruckloadServicesMember		 92.70%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueSegmentMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_ProductConcentrationRiskMember
/ us-gaap_StatementBusinessSegmentsAxis
= ptsi_TruckloadServicesMember
Truckload Services [Member]    
Segment Reporting, Revenue Reconciling Item [Line Items]    
Revenue, before fuel surcharge 72,529us-gaap_CargoAndFreightRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= ptsi_TruckloadServicesMember		 69,447us-gaap_CargoAndFreightRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= ptsi_TruckloadServicesMember
Brokerage and Logistics Services [Member] | Product Concentration Risk [Member] | Sales Revenue, Segment [Member]    
Segment Reporting, Revenue Reconciling Item [Line Items]    
Percentage of revenue, before fuel surcharges 12.30%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueSegmentMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_ProductConcentrationRiskMember
/ us-gaap_StatementBusinessSegmentsAxis
= ptsi_BrokerageAndLogisticsServicesMember		 7.30%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueSegmentMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_ProductConcentrationRiskMember
/ us-gaap_StatementBusinessSegmentsAxis
= ptsi_BrokerageAndLogisticsServicesMember
Brokerage and Logistics Services [Member]    
Segment Reporting, Revenue Reconciling Item [Line Items]    
Revenue, before fuel surcharge $ 10,155us-gaap_CargoAndFreightRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= ptsi_BrokerageAndLogisticsServicesMember		 $ 5,449us-gaap_CargoAndFreightRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= ptsi_BrokerageAndLogisticsServicesMember
Product Concentration Risk [Member] | Sales Revenue, Segment [Member]    
Segment Reporting, Revenue Reconciling Item [Line Items]    
Percentage of revenue, before fuel surcharges 100.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueSegmentMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_ProductConcentrationRiskMember		 100.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueSegmentMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_ProductConcentrationRiskMember