Disposal Group, Including Discontinued Operation, Consideration per Square Foot

No definition available.

Name:	pdm_DisposalGroupIncludingDiscontinuedOperationConsiderationperSquareFoot
Namespace Prefix:	pdm_
Data Type:	us-types:perUnitItemType
Balance Type:	na
Period Type:	instant

- Definition

Real Estate Property, Number of Stories of Building

+ References

No definition available.

+ Details

Name:	pdm_RealEstatePropertyNumberofStoriesofBuilding
Namespace Prefix:	pdm_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of Leased Real Estate Properties

+ References

No definition available.

+ Details

Name:	pdm_RealEstatePropertyPercentofPropertyUnderLease
Namespace Prefix:	pdm_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Area of a real estate property.

+ References

No definition available.

+ Details

Name:	us-gaap_AreaOfRealEstateProperty
Namespace Prefix:	us-gaap_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

+ Details

Name:	us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

+ References

No definition available.

+ Details

Name:	us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=pdm_TwoIndependenceSquareMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DisposalGroupClassificationAxis=us-gaap_DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Subsequent events (Details) $ / shares in Units, $ in Millions		3 Months Ended
	Feb. 08, 2017 $ / shares	Dec. 31, 2016 $ / shares	Sep. 30, 2016 $ / shares	Jun. 30, 2016 $ / shares	Mar. 31, 2016 $ / shares	Dec. 31, 2015 $ / shares	Sep. 30, 2015 $ / shares	Jun. 30, 2015 $ / shares	Mar. 31, 2015 $ / shares	Feb. 21, 2017 USD ($) ft² story $ / squarefeet
Subsequent Event [Line Items]
Dividends declared (in dollars per share)		$ 0.21	$ 0.21	$ 0.21	$ 0.21	$ 0.21	$ 0.21	$ 0.21	$ 0.21
Subsequent Event [Member]
Subsequent Event [Line Items]
Dividends declared (in dollars per share)	$ 0.21
Subsequent Event [Member] \| Sale of Two Independence Square [Member] \| Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Subsequent Event [Line Items]
Number of square feet of office building \| ft²										600,000
Number of stories of office building \| story										9
Percentage leased										100.00%
Amount of sales price \| $										$ 359.6
Sales price per square foot \| $ / squarefeet										593