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Investments in Partially Owned Entities - Summary of Income from Partially Owned Entities (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Schedule Of Equity Method Investments [Line Items]    
Income from partially owned entities $ 975us-gaap_IncomeLossFromEquityMethodInvestments  
Predecessor [Member]    
Schedule Of Equity Method Investments [Line Items]    
Income from partially owned entities   1,132us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_StatementScenarioAxis
= us-gaap_PredecessorMember
712 Fifth Avenue [Member]    
Schedule Of Equity Method Investments [Line Items]    
Equity method ownership percentage 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= pgre_SevenOneTwoFifthAvenueMember
 
Income from partially owned entities 940us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= pgre_SevenOneTwoFifthAvenueMember
 
712 Fifth Avenue [Member] | Predecessor [Member]    
Schedule Of Equity Method Investments [Line Items]    
Equity method ownership percentage 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= pgre_SevenOneTwoFifthAvenueMember
/ us-gaap_StatementScenarioAxis
= us-gaap_PredecessorMember
 
Income from partially owned entities   1,090us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= pgre_SevenOneTwoFifthAvenueMember
/ us-gaap_StatementScenarioAxis
= us-gaap_PredecessorMember
1325 Avenue of the Americas [Member] | Predecessor [Member]    
Schedule Of Equity Method Investments [Line Items]    
Income from partially owned entities   42us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= pgre_OneThreeTwoFiveAvenueOfAmericasMember
/ us-gaap_StatementScenarioAxis
= us-gaap_PredecessorMember
Other [Member]    
Schedule Of Equity Method Investments [Line Items]    
Equity method ownership percentage 9.50%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= pgre_OtherEquityMethodInvestmentsMember
 
Income from partially owned entities $ 35us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= pgre_OtherEquityMethodInvestmentsMember