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Acquisitions (Details) (USD $)
 3 Months Ended
Mar. 31, 2015
sqft
Business Acquisition [Line Items]  
Ownership of properties acquired 100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
$500 Million Unsecured Line of Credit [Member] | Unsecured Debt [Member]  
Business Acquisition [Line Items]  
Face amount of debt instrument $ 500,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= pdm_Unsecured500MillionLineOfCreditMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_UnsecuredDebtMember
Park Place on Turtle Creek [Member]  
Business Acquisition [Line Items]  
Area of property 177,844us-gaap_AreaOfRealEstateProperty
/ us-gaap_BusinessAcquisitionAxis
= pdm_ParkPlaceonTurtleCreekMember
Percentage Leased as of Acquisition 88.00%pdm_PercentageOfLeasedRealEstateProperties
/ us-gaap_BusinessAcquisitionAxis
= pdm_ParkPlaceonTurtleCreekMember
Purchase Price (in millions) $ 46,600,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= pdm_ParkPlaceonTurtleCreekMember