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Real Estate Investments - Equity Investment In Joint Venture (Details) $ in Thousands | Dec. 31, 2022 USD ($) ft² property | Jun. 30, 2022 | Jun. 28, 2022 | Dec. 31, 2021 USD ($) | Mar. 31, 2017
--- | --- | --- | --- | --- | ---
Real Estate |  |  |  |  |
DHC Carrying value | $ | $ 155,477 |  |  | $ 215,127 |
Number of properties owned (property) | property | 379 |  |  |  |
Joint Venture |  |  |  |  |
Real Estate |  |  |  |  |
DHC Carrying value | $ | $ 155,477 |  |  |  |
Number of properties owned (property) | property | 11 |  |  |  |
Area of real estate properties (in square feet) | ft² | 2,203,242 |  |  |  |
Seaport Innovation LLC | Joint Venture |  |  |  |  |
Real Estate |  |  |  |  |
Equity method investment ownership percentage | 10.00% | 20.00% | 20.00% | 20.00% | 55.00%
DHC Carrying value | $ | $ 104,697 |  |  |  |
Number of properties owned (property) | property | 1 |  |  |  |
Area of real estate properties (in square feet) | ft² | 1,134,479 |  |  |  |
The LSMD Fund REIT LLC | Joint Venture |  |  |  |  |
Real Estate |  |  |  |  |
Equity method investment ownership percentage | 20.00% |  |  |  |
DHC Carrying value | $ | $ 50,780 |  |  |  |
Number of properties owned (property) | property | 10 |  |  |  |
Area of real estate properties (in square feet) | ft² | 1,068,763 |  |  |  |

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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + 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 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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- Definition The carrying amount of investments in unconsolidated real estate and other joint ventures not separately presented. This includes direct and indirect investments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(d)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 + Details
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