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Note C - Marketable Equity Securities (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013
Note C - Marketable Equity Securities (Details) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ 6,464,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax		$ 6,402,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax	$ 6,402,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
Available For Sale Securities Net Unrealized Holding Gain Loss Net Of Tax	62,000ptsi_AvailableForSaleSecuritiesNetUnrealizedHoldingGainLossNetOfTax		237,000ptsi_AvailableForSaleSecuritiesNetUnrealizedHoldingGainLossNetOfTax
Investment Income, Dividend	218,000us-gaap_InvestmentIncomeDividend	189,000us-gaap_InvestmentIncomeDividend
Trading Securities, Accumulated Gross Recognized Gain	133,000ptsi_TradingSecuritiesAccumulatedGrossRecognizedGain	52,000ptsi_TradingSecuritiesAccumulatedGrossRecognizedGain
Trading Securities, Accumulated Gross Recognized Loss	0ptsi_TradingSecuritiesAccumulatedGrossRecognizedLoss	0ptsi_TradingSecuritiesAccumulatedGrossRecognizedLoss
Marketable Securities, Reclassification	0ptsi_MarketableSecuritiesReclassification	0ptsi_MarketableSecuritiesReclassification
Proceeds from Sale of Available-for-sale Securities	0us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities	0us-gaap_ProceedsFromSaleOfAvailableForSaleSecurities
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue		0us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue
Trading Securities Pledged as Collateral	13,927,000us-gaap_TradingSecuritiesPledgedAsCollateral		11,723,000us-gaap_TradingSecuritiesPledgedAsCollateral
Available-for-sale Securities [Member]
Note C - Marketable Equity Securities (Details) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ 6,464,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax / us-gaap_GainLossOnInvestmentsByCategoryAxis = us-gaap_AvailableforsaleSecuritiesMember		$ 6,402,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax / us-gaap_GainLossOnInvestmentsByCategoryAxis = us-gaap_AvailableforsaleSecuritiesMember

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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X

- 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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- Details

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X

- 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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X

- 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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X

- 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 14A

-URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580



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 11

-URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e637-108580



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

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X

- 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

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X

- Definition

Amount of dividend income on nonoperating securities.

+ References

Reference 1: 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

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- Definition

The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 45

-Paragraph 11

-URI http://asc.fasb.org/extlink&oid=49167202&loc=d3e26853-111562



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (a),(b)

-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3179-108585

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X

- 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=49124121&loc=d3e5086-111524

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