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Real Estate Investments - Equity Investment In Joint Venture (Details) $ in Thousands | Jun. 30, 2023 USD ($) ft² property | Dec. 31, 2022 USD ($) | Jun. 28, 2022 | Dec. 31, 2021
--- | --- | --- | --- | ---
Real Estate |  |  |  |
DHC Carrying Value of Investment | $ | $ 155,119 | $ 155,477 |  |
Number of Properties | property | 376 |  |  |
Corporate Joint Venture |  |  |  |
Real Estate |  |  |  |
DHC Carrying Value of Investment | $ | $ 155,119 |  |  |
Number of Properties | property | 11 |  |  |
Square Feet | ft² | 2,203,242 |  |  |
Seaport Innovation LLC | Corporate Joint Venture |  |  |  |
Real Estate |  |  |  |
DHC Ownership | 10.00% |  | 20.00% | 55.00%
DHC Carrying Value of Investment | $ | $ 106,305 |  |  |
Number of Properties | property | 1 |  |  |
Square Feet | ft² | 1,134,479 |  |  |
The LSMD Fund REIT LLC | Corporate Joint Venture |  |  |  |
Real Estate |  |  |  |
DHC Ownership | 20.00% |  |  |
DHC Carrying Value of Investment | $ | $ 48,814 |  |  |
Number of Properties | property | 10 |  |  |
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://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481687/323-10-50-3 + 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://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(1)(d)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 + Details
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