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Organization and Basis of Presentation - Additional Information (Detail) ft² in Millions |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Apr. 28, 2025 | Jun. 30, 2025 | Jun. 30, 2026 ft² Property $ / shares shares | Dec. 31, 2025 $ / shares shares
Organization And Significant Accounting Policies [Line Items] |  |  |  |
Reverse stock split, description |  | effective April 28, 2025 (the “Reverse Stock Split”). Concurrently with the Reverse Stock Split, our operating partnership completed a corresponding 1-for-2.5 reverse unit split of outstanding common units and LTIP units (the “Reverse Unit Split”). |  |
Reverse stock split ratio | 0.4 |  |  |
Reverse unit split ratio | 0.4 |  |  |
Common Stock, shares outstanding | shares |  |  | 47,321,617 | 46,303,469
Common Stock, shares authorized | shares |  |  | 80,000,000 | 80,000,000
Common Stock, par value | $ / shares |  |  | $ 0.01 | $ 0.01
Easterly Government Properties LP [Member] |  |  |  |
Organization And Significant Accounting Policies [Line Items] |  |  |  |
Outstanding common units of aggregate limited partnership interest owned percentage |  |  | 96.70% |
Joint Venture [Member] |  |  |  |
Organization And Significant Accounting Policies [Line Items] |  |  |  |
Number of properties |  |  | 10 |
U.S. General Services Administration [Member] | Minimum [Member] |  |  |  |
Organization And Significant Accounting Policies [Line Items] |  |  |  |
Percentage of revenue by leasing properties |  |  | 85.00% |
Wholly Owned Operating Properties [Member] |  |  |  |
Organization And Significant Accounting Policies [Line Items] |  |  |  |
Number of properties |  |  | 96 |
Leased percentage of operating properties |  |  | 98.00% |
Aggregate area of land | ft² |  |  | 10.7 |
Wholly Owned Operating Properties [Member] | Government [Member] |  |  |  |
Organization And Significant Accounting Policies [Line Items] |  |  |  |
Number of properties |  |  | 93 |
Wholly Owned Operating Properties Entirely Leased [Member] | Private Tenants [Member] |  |  |  |
Organization And Significant Accounting Policies [Line Items] |  |  |  |
Number of properties |  |  | 5 |
Wholly Owned Properties Under Development [Member] |  |  |  |
Organization And Significant Accounting Policies [Line Items] |  |  |  |
Number of properties |  |  | 3 |
Aggregate area of land | ft² |  |  | 0.2 |

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