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Investments in Unconsolidated Joint Ventures - Summary of Investments and Income from Investments In Unconsolidated Joint Ventures (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Schedule Of Equity Method Investments [Line Items]
Investments in unconsolidated joint ventures	$ 407,564		$ 407,564		$ 412,724
Loss from unconsolidated joint ventures	$ (15,717)	$ (5,955)	$ (21,033)	$ (10,176)
712 Fifth Avenue [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method paramount ownership percentage	50.00%		50.00%
Loss from unconsolidated joint ventures	$ (11,128)	229	$ (11,128)	229
Market Center [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method paramount ownership percentage	67.00%		67.00%
Investments in unconsolidated joint ventures	$ 189,985		$ 189,985		192,306
Loss from unconsolidated joint ventures	$ (2,914)	(3,070)	$ (7,044)	(5,924)
55 Second Street [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method paramount ownership percentage	44.10%		44.10%
Investments in unconsolidated joint ventures	$ 90,829		$ 90,829		92,298
Loss from unconsolidated joint ventures	$ (847)	(662)	$ (1,469)	(1,346)
111 Sutter Street [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method paramount ownership percentage	49.00%		49.00%
Investments in unconsolidated joint ventures	$ 36,634		$ 36,634		37,818
Loss from unconsolidated joint ventures	$ (699)	(919)	$ (1,189)	(1,529)
60 Wall Street [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method paramount ownership percentage	5.00%		5.00%
Investments in unconsolidated joint ventures	$ 19,198		$ 19,198		19,164
Loss from unconsolidated joint ventures	$ 17	(9)	$ 34	(91)
One Steuart Lane [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method paramount ownership percentage	35.00%		35.00%
Investments in unconsolidated joint ventures	$ 67,292		$ 67,292		67,505
Loss from unconsolidated joint ventures	$ (132)	(1,549)	$ (225)	(1,550)
Oder-Center, Germany [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method paramount ownership percentage	9.50%		9.50%
Investments in unconsolidated joint ventures	$ 3,626		$ 3,626		$ 3,633
Loss from unconsolidated joint ventures	$ (14)	$ 25	$ (12)	$ 35