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Real Estate Joint Ventures - Investments in Unconsolidated Real Estate Joint Ventures (Details) $ in Thousands | Jun. 30, 2023 USD ($) property | Jan. 10, 2023 | Dec. 31, 2022 USD ($)
--- | --- | --- | ---
Schedule of Equity Method Investments [Line Items] |  |  |
Investment in unconsolidated real estate joint ventures | $ 41,928 |  | $ 21,460
Other liabilities | $ (27,699) |  | (18,556)
Unconsolidated Real Estate Joint Ventures |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Number of Properties | property | 24 |  |
Carrying value of Investments | $ 39,929 |  | 20,001
Other liabilities | $ (2,000) |  | (1,500)
Redshift JV LLC |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Nominal Ownership % | 10.00% | 10.00% |
Number of Properties | property | 3 |  |
Carrying value of Investments | $ 21,151 |  | 0
BREIT COPT DC JV LLC |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Nominal Ownership % | 10.00% |  |
Number of Properties | property | 9 |  |
Carrying value of Investments | $ 11,096 |  | 11,568
Quark JV LLC |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Nominal Ownership % | 10.00% |  |
Number of Properties | property | 2 |  |
Carrying value of Investments | $ 6,747 |  | 6,758
B RE COPT DC JV III LLC |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Nominal Ownership % | 10.00% |  |
Number of Properties | property | 2 |  |
Carrying value of Investments | $ 2,934 |  | 3,134
B RE COPT DC JV II LLC |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Nominal Ownership % | 10.00% |  |
Number of Properties | property | 8 |  |
Carrying value of Investments | $ (1,999) |  | (1,459)
Difference between the joint venture's cost basis and the entity's share of underlying equity in the net assets | $ 6,900 |  | $ 7,000

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- Definition Difference between amount at which an investment accounted for under the equity method of accounting is carried (reported) on the balance sheet and amount of underlying equity in net assets the reporting Entity has in the investee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481687/323-10-50-3 + Details
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