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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 | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Investments in unconsolidated joint ventures | $ 417,592 |  | $ 417,592 |  | $ 449,180
Loss from unconsolidated joint ventures | $ (4,268) | $ (1,332) | $ (14,444) | $ (2,815) |
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 | $ 229 | 373 | $ 458 | 1,290 |
Market Center [Member] |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Equity method paramount ownership percentage | 67.00% |  | 67.00% |  |
Investments in unconsolidated joint ventures | $ 195,419 |  | $ 195,419 |  | 219,593
Loss from unconsolidated joint ventures | $ (2,654) |  | $ (8,578) |  |
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 | $ 93,225 |  | $ 93,225 |  | 95,384
Loss from unconsolidated joint ventures | $ (713) | (336) | $ (2,059) | (336) |
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 | $ 38,550 |  | $ 38,550 |  | 41,519
Loss from unconsolidated joint ventures | $ (884) | (1,266) | $ (2,413) | (3,387) |
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 | $ 19,154 |  | $ 19,154 |  | 19,777
Loss from unconsolidated joint ventures | $ 10 | (138) | $ (81) | (436) |
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 | $ 67,769 |  | $ 67,769 |  | 69,536
Loss from unconsolidated joint ventures | $ (223) | 1 | $ (1,773) | (6) |
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 | $ 3,475 |  | $ 3,475 |  | $ 3,371
Loss from unconsolidated joint ventures | $ (33) | $ 34 | $ 2 | $ 60 |

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