XML 26 R31.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Note C - Marketable Equity Securities (Details) - Recognized Gains (Losses) in Market Value for Securities (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012
Trading securities |  |  |  |
Recognized loss at end of period | $ (9) | $ (28) | $ (9) | $ (28)
Beginning of Period [Member] |  |  |  |
Trading securities |  |  |  |
Recognized gain (loss) | (6) | (13) | (26) | (16)
Gain (Loss) on Investments, Before Tax [Member] |  |  |  |
Trading securities |  |  |  |
Recognized gain (loss) | (3) | (15) | 17 | (12)
Gain (Loss) on Investments, Net of Tax [Member] |  |  |  |
Trading securities |  |  |  |
Recognized gain (loss) | $ (2) | $ (9) | $ 10 | $ (7)

X
- Details
Name: | ptsi_TradingSecuritiesAbstract0
Namespace Prefix: | ptsi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition This item represents the gain (loss) recognized during the period from the sale of trading securities. + References No definition available. + Details
Name: | ptsi_TradingSecuritiesRecognizedGainloss
Namespace Prefix: | ptsi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition This item represents the loss recognized during the period from the sale of trading securities. + References No definition available. + Details
Name: | ptsi_TradingSecuritiesRecognizedLoss
Namespace Prefix: | ptsi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration