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Note G - Accumulated Other Comprehensive Income (Details) (USD $)	3 Months Ended
	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

Name:	us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration