Quarterly report pursuant to Section 13 or 15(d)

Real Estate - Properties Sold and Held for Sale (Details)

v3.21.2
Real Estate - Properties Sold and Held for Sale (Details)
ft² in Thousands, $ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Dec. 17, 2020
USD ($)
ft²
Dec. 02, 2020
USD ($)
ft²
Apr. 21, 2020
USD ($)
ft²
Jun. 30, 2021
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2021
USD ($)
Jun. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
ft²
Jun. 30, 2021
unit
Jun. 30, 2021
property
Jun. 30, 2021
ft²
Properties Sold and Held for Sale [Line Items]                      
(Loss) gain on sale       $ 0 $ (7,539) $ 0 $ (7,539)        
Office                      
Properties Sold and Held for Sale [Line Items]                      
Number of properties held for sale                 12 12  
Retail                      
Properties Sold and Held for Sale [Line Items]                      
Number of properties held for sale | property                   8  
2021 Properties | Held for sale                      
Properties Sold and Held for Sale [Line Items]                      
Rentable Square Feet (sq ft) | ft²                     3,063
Contract Sales Price       934,314   934,314          
2021 Properties | Held for sale | Office                      
Properties Sold and Held for Sale [Line Items]                      
Rentable Square Feet (sq ft) | ft²                     2,370
Contract Sales Price       766,000   766,000          
2021 Properties | Held for sale | Retail                      
Properties Sold and Held for Sale [Line Items]                      
Rentable Square Feet (sq ft) | ft²                     693
Contract Sales Price       $ 168,314   $ 168,314          
2020 Properties | Disposal group                      
Properties Sold and Held for Sale [Line Items]                      
Rentable Square Feet (sq ft) | ft²               565      
Contract Sales Price               $ 163,500      
(Loss) gain on sale               $ (14,325)      
2020 Properties | Disposal group | John Marshall II | Office                      
Properties Sold and Held for Sale [Line Items]                      
Rentable Square Feet (sq ft) | ft²     223                
Contract Sales Price     $ 57,000                
(Loss) gain on sale     $ (6,855)                
2020 Properties | Disposal group | Monument II | Office                      
Properties Sold and Held for Sale [Line Items]                      
Rentable Square Feet (sq ft) | ft²   207                  
Contract Sales Price   $ 53,000                  
(Loss) gain on sale   $ (8,595)                  
2020 Properties | Disposal group | 1227 25th Street | Office                      
Properties Sold and Held for Sale [Line Items]                      
Rentable Square Feet (sq ft) | ft² 135                    
Contract Sales Price $ 53,500                    
(Loss) gain on sale $ 1,125