v3.26.1
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