Name:	ptsi_AllocatedShareBasedCompensationExpenseImpactOnEarningsPerShareBasicAndDiluted
Namespace Prefix:	ptsi_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

Represents the number of shares for share-based compensation arrangement by share-based payment awards.

No definition available.

Name:	ptsi_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsNumberOfShares
Namespace Prefix:	ptsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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-Topic 718
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-Section S99
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-Subparagraph (SAB Topic 14.F)
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Name:	us-gaap_AllocatedShareBasedCompensationExpense
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Data Type:	xbrli:monetaryItemType
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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Data Type:	num:perShareItemType
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Period Type:	duration

Number of shares authorized for issuance under share-based payment arrangement.

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Purchase price of common stock expressed as a percentage of its fair value.

No definition available.