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Investments in Unconsolidated Joint Ventures (Statements of Operations of the Joint Ventures) (Details) - USD ($) $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Oct. 31, 2023 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 14, 2023
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Total revenue |  |  | $ 3,273,569 |  | $ 3,108,581 |  | $ 2,888,621 |  |
Expenses |  |  |  |  |  |  |  |  |
Transaction costs |  |  | 4,313 |  | 2,905 |  | 5,036 |  |
Depreciation and amortization |  |  | 830,813 |  | 749,775 |  | 717,336 |  |
Total expenses |  |  | 2,239,227 |  | 2,050,056 |  | 1,920,581 |  |
Other income (expense) |  |  |  |  |  |  |  |  |
Losses from early extinguishment of debt |  |  | 0 |  | 0 |  | (45,182) |  |
Interest expense |  |  | (579,572) |  | (437,139) |  | (423,346) |  |
Gain on sales-type lease |  |  | 0 |  | 10,058 |  | 0 |  |
Net Loss |  |  | 291,424 |  | 1,020,584 |  | 631,932 |  |
Income (Loss) from Equity Method Investments |  |  | (239,543) |  | (59,840) |  | (2,570) |  |
Straight Line Rent Adjustments |  |  | 99,100 |  | 108,000 |  | 104,300 |  |
Above and below market rent adjustments, net |  |  | 19,200 |  | 9,100 |  | 4,200 |  |
Unconsolidated Joint Ventures [Member] |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Total revenue | [1] |  | 612,589 |  | 512,078 |  | 383,649 |  |
Expenses |  |  |  |  |  |  |  |  |
Operating |  |  | 239,947 |  | 198,632 |  | 158,498 |  |
Transaction costs |  |  | 301 |  | 837 |  | 470 |  |
Depreciation and amortization |  |  | 197,228 |  | 181,041 |  | 147,121 |  |
Total expenses |  |  | 437,476 |  | 380,510 |  | 306,089 |  |
Other income (expense) |  |  |  |  |  |  |  |  |
Losses from early extinguishment of debt |  |  | (3) |  | (1,327) |  | 0 |  |
Interest expense |  |  | (227,537) |  | (154,065) |  | (108,884) |  |
Unrealized gain (loss) on derivative instruments |  |  | 6,582 |  | (1,681) |  | 0 |  |
Gain on sales-type lease |  |  | 2,737 |  | 0 |  | 0 |  |
Net Loss |  |  | (56,272) |  | (22,143) |  | (31,324) |  |
Company's share of net income (loss) |  |  | (19,599) |  | (2,551) |  | (10,254) |  |
Gain on Sale of Investments |  |  | 0 |  | 0 |  | 10,257 | [2] |
Gain on Unconsolidated Joint Venture Investment |  |  | 35,756 | [3] | 0 |  | 0 |  |
Gain (loss) on sale / consolidation |  |  | 28,412 | [3],[4] | 0 |  | 0 |  |
Impairment loss on investment |  |  | (272,603) | [5] | (50,705) | [5] | 0 |  |
Basis differential | [6] |  | (11,509) |  | (6,584) |  | (2,573) |  |
Income (Loss) from Equity Method Investments |  |  | (239,543) |  | (59,840) |  | (2,570) |  |
Straight Line Rent Adjustments |  |  | 28,700 |  | 62,900 |  | 17,200 |  |
Above and below market rent adjustments, net |  |  | 800 |  | 400 |  | $ 400 |  |
Unconsolidated Joint Ventures [Member] | Unconsolidated Properties |  |  |  |  |  |  |  |  |
Other income (expense) |  |  |  |  |  |  |  |  |
Impairment loss on investment |  |  | 272,600 |  |  |  |  |  |
Annapolis Junction NFM, LLC [Member] |  |  |  |  |  |  |  |  |
Other income (expense) |  |  |  |  |  |  |  |  |
Ownership Percentage |  |  |  |  |  |  | 50.00% |  |
Annapolis Junction NFM, LLC [Member] | Unconsolidated Joint Ventures [Member] |  |  |  |  |  |  |  |  |
Other income (expense) |  |  |  |  |  |  |  |  |
Gain on Sale of Investments |  |  |  |  |  |  | $ 10,300 |  |
Colorado Center [Member] | Unconsolidated Joint Ventures [Member] |  |  |  |  |  |  |  |  |
Other income (expense) |  |  |  |  |  |  |  |  |
Straight Line Rent Adjustments |  |  | 1,500 |  | $ 500 |  | $ 800 |  |
Dock 72 [Member] | Unconsolidated Joint Ventures [Member] |  |  |  |  |  |  |  |  |
Other income (expense) |  |  |  |  |  |  |  |  |
Impairment loss on investment |  |  | 50,700 |  |  |  |  |  |
200 Fifth Avenue JV LLC |  |  |  |  |  |  |  |  |
Other income (expense) |  |  |  |  |  |  |  |  |
Impairment loss on investment |  |  | $ 33,400 |  |  |  |  |  |
Ownership Percentage | [7] |  | 26.69% |  |  |  |  |  |
200 Fifth Avenue JV LLC | Unconsolidated Joint Ventures [Member] |  |  |  |  |  |  |  |  |
Other income (expense) |  |  |  |  |  |  |  |  |
Impairment loss on investment |  |  | $ 33,400 |  |  |  |  |  |
Safeco Plaza REIT LLC |  |  |  |  |  |  |  |  |
Other income (expense) |  |  |  |  |  |  |  |  |
Impairment loss on investment |  |  | $ 29,900 |  |  |  |  |  |
Ownership Percentage | [7],[8] |  | 33.67% |  |  |  |  |  |
Safeco Plaza REIT LLC | Unconsolidated Joint Ventures [Member] |  |  |  |  |  |  |  |  |
Other income (expense) |  |  |  |  |  |  |  |  |
Impairment loss on investment |  |  | $ 29,900 |  |  |  |  |  |
Platform 16 |  |  |  |  |  |  |  |  |
Other income (expense) |  |  |  |  |  |  |  |  |
Impairment loss on investment |  |  | $ 155,200 |  |  |  |  |  |
Ownership Percentage | [7],[9] |  | 55.00% |  |  |  |  |  |
Platform 16 | Unconsolidated Joint Ventures [Member] |  |  |  |  |  |  |  |  |
Other income (expense) |  |  |  |  |  |  |  |  |
Impairment loss on investment |  |  | $ 155,200 |  |  |  |  |  |
360 PAS Holdco LLC |  |  |  |  |  |  |  |  |
Other income (expense) |  |  |  |  |  |  |  |  |
Impairment loss on investment |  |  | $ 54,000 |  |  |  |  |  |
Ownership Percentage | [7],[10] |  | 71.11% |  |  |  |  |  |
360 PAS Holdco LLC | Unconsolidated Joint Ventures [Member] |  |  |  |  |  |  |  |  |
Other income (expense) |  |  |  |  |  |  |  |  |
Impairment loss on investment |  |  | $ 54,000 |  |  |  |  |  |
Santa Monica Business Park [Member] |  |  |  |  |  |  |  |  |
Other income (expense) |  |  |  |  |  |  |  |  |
Ownership Percentage | [11] |  |  |  | 55.00% |  |  |  |
Santa Monica Business Park [Member] | Joint Venture Partner [Member] |  |  |  |  |  |  |  |  |
Other income (expense) |  |  |  |  |  |  |  |  |
Ownership Percentage |  |  |  |  |  |  |  |  | 45.00%
Hotel Tower Developer LLC [Member] |  |  |  |  |  |  |  |  |
Other income (expense) |  |  |  |  |  |  |  |  |
Ownership Percentage |  |  | 50.00% |  |  |  |  |  |
Hotel Tower Developer LLC [Member] | Unconsolidated Properties | Hub on Causeway - Hotel Air Rights |  |  |  |  |  |  |  |  |
Other income (expense) |  |  |  |  |  |  |  |  |
Gain on sales-type lease |  | $ 2,700 |  |  |  |  |  |  |
Ownership Percentage |  | 50.00% |  |  |  |  |  |  |
[1] | Includes straight-line rent adjustments of approximately $28.7 million, $62.9 million and $17.2 million for the years ended December 31, 2023, 2022 and 2021, respectively.
[2] | During the year ended December 31, 2021, the Company completed the sale of its 50% ownership interest in Annapolis Junction NFM LLC. The Company recognized a gain on sale of investment of approximately $10.3 million.
[3] | During the year ended December 31, 2023, the Company completed a restructuring of its ownership in Metropolitan Square, as described below in this Note 6.
[4] | During the year ended December 31, 2023, the Company acquired its joint venture partner’s 45% ownership interest in Santa Monica Business Park, as described below in this Note 6.
[5] | During the year ended December 31, 2023, the Company recognized an other-than-temporary impairment loss on its investments in Platform 16, 360 Park Avenue South, 200 Fifth Avenue and Safeco Plaza of approximately $155.2 million, $54.0 million, $33.4 million and $29.9 million, respectively, as described below in this Note 6. During the year ended December 31, 2022, the Company recognized an other-than-temporary impairment loss on its investment in the unconsolidated joint venture that owns Dock 72 in Brooklyn, New York totaling approximately $50.7 million.
[6] | Includes straight-line rent adjustments of approximately $1.5 million, $0.5 million and $0.8 million for the years ended December 31, 2023, 2022 and 2020, respectively. Also includes net above-/below-market rent adjustments of approximately $0.8 million, $0.4 million and $0.4 million for the years ended December 31, 2023, 2022 and 2021, respectively.
[7] | During the year ended December 31, 2023, the Company recognized an other-than-temporary impairment loss on its investment.
[8] | The Company’s ownership includes (1) a 33.0% direct interest in the joint venture, and (2) an additional 1% interest in each of the two entities through which each partner owns its interest in the joint venture.
[9] | At December 31, 2022, this entity was a VIE.
[10] | On December 14, 2023, the Company completed the acquisition of all of one of its joint venture partners ownership interest. As a result of this acquisition, at December 31, 2023, the Company’s ownership includes (1) a 35.79% direct interest in the joint venture, (2) an additional 35.02% indirect ownership in the joint venture, and (3) an additional 1% interest in the entity through which the partner owns its interest in the joint venture. The Company’s partner will fund required capital until its aggregate investment is approximately 29% of all capital contributions; thereafter, the partners will fund required capital according to their percentage interests. At December 31, 2022, the Company’s ownership included (1) a 35.79% direct interest in the joint venture, (2) an additional 5.837% indirect ownership in the joint venture, and (3) an additional 1% interest in each of the two entities through which each partner owns its interest in the joint venture.
[11] | During the year ended December 31, 2023, the Company completed the acquisition of its joint venture partner’s 45% ownership interest in Santa Monica Business Park, as described below in this Note 6 and Note 3.

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