Name:	pva_BusinessCombinationUndisputedContractualAdjustmentsinArbitration
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The amount of the gain recorded in connection with the transaction involving the sale of property to another party and the lease of the property back to the seller to be recognized within one year or the normal operating cycle, if longer.

No definition available.

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

The amount of the gain realized in connection with the transaction involving the sale of property to another party and the lease of the property back to the seller that was recognized in the current period, net of the portion of the gain that was deferred

No definition available.

Name:	pva_SaleLeasebackTransactionRecognizedGainNet
Namespace Prefix:	pva_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_BusinessAcquisitionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Amount of gain (loss) on sale or disposal of proven and unproven oil and gas properties.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

Name:	us-gaap_GainLossOnSaleOfOilAndGasProperty
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Data Type:	xbrli:monetaryItemType
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The cash inflow to dispose of long-lived, physical assets and mineral interests in oil and gas properties used for normal oil and gas operations.

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 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585

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Data Type:	xbrli:monetaryItemType
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The portion of the deferred gain that was recognized in the current period.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 40

-Section 35

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=21918046&loc=d3e50609-112754

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Data Type:	xbrli:monetaryItemType
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The amount of the gain recorded in connection with the transaction involving the sale of property to another party and the lease of the property back to the seller to be recognized in future periods.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 40

-Section 25

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6456126&loc=d3e49567-112750

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

The portion of the gain that will be recorded as income or a reduction in rent expense in future periods less amounts recognized in the current period.