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Investments in and Advances to Unconsolidated Joint Ventures (Tables) | 12 Months Ended
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Dec. 31, 2022
Equity Method Investments and Joint Ventures [Abstract] |
Schedule of Company Owned Interests in Entities, Accounted Under Equity Method | The Company owns interests in the following entities that are accounted for under the equity method, excluding investments classified as discontinued operations (dollars in thousands):
|  |  |  |  |  |  | Carrying Amount
|  |  |  |  |  |  | December 31,
Entity(1) |  | Segment |  | Property Count(2) | Ownership %(2) |  | 2022 |  | 2021
SWF SH JV |  | Other |  | 19 | 54 |  | $ | 345,978 |  |  | $ | 355,394 |
South San Francisco JVs(3) |  | Life science |  | 7 | 70 |  | 309,969 |  |  | — |
Life Science JV |  | Life science |  | 1 | 49 |  | 26,601 |  |  | 25,605 |
Needham Land Parcel JV(4) |  | Life science |  | — | 38 |  | 15,391 |  |  | 13,566 |
Medical Office JVs(5) |  | Medical office |  | 3 | 20 - 67 |  | 8,738 |  |  | 9,069 |
|  |  |  |  |  |  | $ | 706,677 |  |  | $ | 403,634 |
_______________________________________ (1)These entities are not consolidated because the Company does not control, through voting rights or other means, the joint ventures. (2)Property counts and ownership percentages are as of December 31, 2022. (3)Includes seven unconsolidated life science joint ventures in South San Francisco, California in which the Company holds a 70% ownership percentage in each joint venture. These joint ventures have been aggregated herein due to similarity of the investments and operations. See “South San Francisco Joint Ventures” below for further information. (4)In December 2021, the Company acquired a 38% interest in a life science development joint venture in Needham, Massachusetts for $13 million. Land held for development is excluded from the property count as of December 31, 2022. (5)Includes two unconsolidated medical office joint ventures in which the Company holds an ownership percentage as follows: (i) Ventures IV (20%) and (ii) Suburban Properties, LLC (67%). During 2021, the Company also held a 30% interest in Ventures III, which issued its final distribution and was dissolved. These joint ventures have been aggregated herein due to similarity of the investments and operations.

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- Definition Tabular disclosure of equity method investments including, but not limited to, name of each investee or group of investments, percentage ownership, difference between recorded amount of an investment and the value of the underlying equity in the net assets, and summarized financial information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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