Investments in Unconsolidated Joint Ventures - Summary of Investments and Income from Investments In Unconsolidated Joint Ventures (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Schedule Of Equity Method Investments [Line Items]
Investments in unconsolidated joint ventures	$ 411,790		$ 412,724
Loss from unconsolidated joint ventures	$ (5,316)	$ (4,221)
712 Fifth Avenue [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method paramount ownership percentage	50.00%
Market Center [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method paramount ownership percentage	67.00%
Investments in unconsolidated joint ventures	$ 192,391		192,306
Loss from unconsolidated joint ventures	$ (4,130)	(2,854)
55 Second Street [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method paramount ownership percentage	44.10%
Investments in unconsolidated joint ventures	$ 91,676		92,298
Loss from unconsolidated joint ventures	$ (622)	(684)
111 Sutter Street [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method paramount ownership percentage	49.00%
Investments in unconsolidated joint ventures	$ 37,329		37,818
Loss from unconsolidated joint ventures	$ (490)	(610)
60 Wall Street [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method paramount ownership percentage	5.00%
Investments in unconsolidated joint ventures	$ 19,180		19,164
Loss from unconsolidated joint ventures	$ 17	(82)
One Steuart Lane [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method paramount ownership percentage	35.00%
Investments in unconsolidated joint ventures	$ 67,422		67,505
Loss from unconsolidated joint ventures	$ (93)	(1)
Oder-Center, Germany [Member]
Schedule Of Equity Method Investments [Line Items]
Equity method paramount ownership percentage	9.50%
Investments in unconsolidated joint ventures	$ 3,792		$ 3,633
Loss from unconsolidated joint ventures	$ 2	$ 10

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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