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Note 3 - Marketable Equity Securities (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Note 3 - Marketable Equity Securities (Details) [Line Items] |  |  |
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities | $ 1,000 us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities | $ 29,000 us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities | $ 70,000 us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities
Accumulated Other Comprehensive Income (Loss), Net of Tax | 6,402,000 us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax | 6,160,000 us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax |
Available For Sale Securities Net Unrealized Holding Gain Loss Net Of Tax | 237,000 ptsi_AvailableForSaleSecuritiesNetUnrealizedHoldingGainLossNetOfTax | 1,897,000 ptsi_AvailableForSaleSecuritiesNetUnrealizedHoldingGainLossNetOfTax |
Investment Income, Dividend | 896,000 us-gaap_InvestmentIncomeDividend | 781,000 us-gaap_InvestmentIncomeDividend | 838,000 us-gaap_InvestmentIncomeDividend
Trading Securities, Accumulated Gross Recognized Gain | 146,000 ptsi_TradingSecuritiesAccumulatedGrossRecognizedGain | 8,000 ptsi_TradingSecuritiesAccumulatedGrossRecognizedGain |
Trading Securities, Accumulated Gross Recognized Loss | 0 ptsi_TradingSecuritiesAccumulatedGrossRecognizedLoss | 0 ptsi_TradingSecuritiesAccumulatedGrossRecognizedLoss |
Marketable Securities, Reclassification | 0 ptsi_MarketableSecuritiesReclassification | 0 ptsi_MarketableSecuritiesReclassification |
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 0 us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue | 0 us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue |
Trading Securities Pledged as Collateral | 11,723,000 us-gaap_TradingSecuritiesPledgedAsCollateral | 10,017,000 us-gaap_TradingSecuritiesPledgedAsCollateral |
Available-for-sale Securities [Member] |  |  |
Note 3 - Marketable Equity Securities (Details) [Line Items] |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax | $ 6,402,000 us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax / us-gaap_GainLossOnInvestmentsByCategoryAxis = us-gaap_AvailableforsaleSecuritiesMember | $ 6,160,000 us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax / us-gaap_GainLossOnInvestmentsByCategoryAxis = us-gaap_AvailableforsaleSecuritiesMember |
Margin Account Borrowings [Member] |  |  |
Note 3 - Marketable Equity Securities (Details) [Line Items] |  |  |
Debt, Weighted Average Interest Rate | 0.76%us-gaap_DebtWeightedAverageInterestRate / us-gaap_FairValueByLiabilityClassAxis = ptsi_MarginAccountBorrowingsMember | 0.76%us-gaap_DebtWeightedAverageInterestRate / us-gaap_FairValueByLiabilityClassAxis = ptsi_MarginAccountBorrowingsMember |

X
- Definition Unrealized holding gain (loss), net of tax, on available-for-sale securities included in a separate component of shareholders' equity during the period. + References No definition available. + Details
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- Definition The amount of reclassification during the period among trading securities, securities available-for-sale and securities held-to-maturity. + References No definition available. + Details
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- Definition Amount of accumulated gross recognized gain on investments in debt and equity securities classified as trading. + References No definition available. + Details
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- Definition Amount of accumulated gross recognized loss on investments in debt and equity securities classified as trading. + References No definition available. + Details
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- Definition Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e637-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e681-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 31 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 + Details
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- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for twelve months or longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
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- Definition Amount of dividend income on nonoperating securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.7(a)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition The amount by which the fair value of an investment in debt and equity securities categorized as Available-for-sale is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
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- Definition The fair value of trading securities that serve as collateral for borrowings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5086-111524 + Details
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