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Nature of Operations Nature of Operations (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
Nature of Operations [Abstract]
Merger Costs - G&A	$ 0.7

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- Definition

Merger Costs - G&A

+ References

No definition available.

+ Details

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

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- Definition

Nature of Operations [Abstract]

+ References

No definition available.

+ Details

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Namespace Prefix:	pva_
Data Type:	xbrli:stringItemType
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Period Type:	duration