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Note G - Accumulated Other Comprehensive Income (Details) (USD $) | 3 Months Ended
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Mar. 31, 2014
Accumulated Other Comprehensive Income [Abstract] |
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax | $ 0

X
- Details
Name: | ptsi_AccumulatedOtherComprehensiveIncomeTextBlockAbstract
Namespace Prefix: | ptsi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount after tax of reclassification adjustments of other comprehensive income (loss). + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration