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Interest and Other Income - Schedule of Interest and Other Income (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Schedule Of Investment Income Reported Amounts By Category [Line Items]    
Mark-to-market of investments in our deferred compensation plans $ 733pgre_InvestmentIncomeOnInvestmentsInDeferredCompensationPlan  
Interest and other income 121us-gaap_InterestAndOtherIncome  
Total interest and other income 854pgre_InterestAndOtherIncomeLossNet  
Predecessor [Member]    
Schedule Of Investment Income Reported Amounts By Category [Line Items]    
Mark-to-market of investments in our deferred compensation plans   584pgre_InvestmentIncomeOnInvestmentsInDeferredCompensationPlan
/ us-gaap_StatementScenarioAxis
= us-gaap_PredecessorMember
Interest and other income   125us-gaap_InterestAndOtherIncome
/ us-gaap_StatementScenarioAxis
= us-gaap_PredecessorMember
Total interest and other income   $ 709pgre_InterestAndOtherIncomeLossNet
/ us-gaap_StatementScenarioAxis
= us-gaap_PredecessorMember