Accumulated Other Comprehensive Loss - Summary of Changes in Accumulated Other Comprehensive Loss by Component (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]
Amount of income (loss) related to unconsolidated joint ventures recognized in other comprehensive income (loss) (1)	$ 3,422	$ (14,568)
Amounts reclassified from accumulated other comprehensive loss increasing (decreasing) loss from unconsolidated joint ventures (1)	$ 962	$ (93)

Amount after tax of reclassification adjustments of Company's pro rata share of other comprehensive income (loss) from unconsolidated joint ventures.

No definition available.

Name:	pgre_ProRataShareOfReclassificationFromAccumulatedOtherComprehensiveIncomeRelatedToUnconsolidatedJointVentures
Namespace Prefix:	pgre_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration