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INVESTMENT IN UNCONSOLIDATED REAL ESTATE VENTURES - JGB Ventures (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 USD ($) a joint_venture property | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Schedule of Equity Method Investments [Line Items] |  |  |
Number of real estate properties | property | 64 |  |
Other-than-temporary impairment | $ | $ 8,378 | $ 37,176 | $ 0
JBG Ventures |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Other-than-temporary impairment | $ | $ 22,200 |  |
JBG/DC Manager LLC |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Number of real estate properties | joint_venture | 2 |  |
JBG 1250 First Street Office |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity method investment, ownership percentage | 70.00% |  |
Area owned by real estate venture of undeveloped parcels of land | a | 0.5 |  |
JBG 1250 First Street Office | JBG Ventures |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity method investment, ownership percentage | 70.00% |  |
JBG 1250 First Street Office | JBG/DC Manager LLC |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity method investment, ownership percentage | 30.00% |  |
JBG 51 N Street |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity method investment, ownership percentage | 70.00% |  |
Area owned by real estate venture of undeveloped parcels of land | a | 0.9 |  |
JBG 51 N Street | JBG Ventures |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity method investment, ownership percentage | 70.00% |  |
JBG 51 N Street | JBG/DC Manager LLC |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity method investment, ownership percentage | 30.00% |  |

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- Definition Amount of other-than-temporary decline in value that has been recognized against investment accounted for under equity method of accounting. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481664/323-10-45-1 + Details
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