Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.2
Real Estate - Properties Sold and Held for Sale Narrative (Details)
ft² in Thousands, $ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
Apr. 21, 2020
USD ($)
ft²
Dec. 19, 2019
USD ($)
ft²
Aug. 27, 2019
USD ($)
Aug. 21, 2019
USD ($)
Jul. 23, 2019
USD ($)
Jun. 26, 2019
USD ($)
ft²
building
Jun. 30, 2019
buyer
agreement
Jun. 30, 2020
USD ($)
ft²
Sep. 30, 2019
USD ($)
Jun. 30, 2019
USD ($)
Mar. 31, 2019
USD ($)
Jun. 30, 2020
USD ($)
ft²
Jun. 30, 2019
USD ($)
Dec. 31, 2019
USD ($)
ft²
Properties Sold and Held for Sale [Line Items]                            
(Loss) gain on sale               $ (7,539)   $ (1,046)   $ (7,539) $ (1,046)  
Real estate impairment               $ 0   $ 0   $ 0 $ 8,374  
Loss on extinguishment of debt                 $ 800          
2020 Properties                            
Properties Sold and Held for Sale [Line Items]                            
Rentable square feet (sq ft) | ft²               223       223    
Contract sales price               $ 57,000       $ 57,000    
2019 Properties                            
Properties Sold and Held for Sale [Line Items]                            
Rentable square feet (sq ft) | ft²                           2,184
Contract sales price                           $ 728,750
Quantico Corporate Center | Office                            
Properties Sold and Held for Sale [Line Items]                            
Number of buildings | building           2                
Rentable square feet (sq ft) | ft²           272                
Contract sales price           $ 33,000                
(Loss) gain on sale           $ 1,000                
Real estate impairment                     $ 8,400      
Quantico Corporate Center | Disposal group, not discontinued operations | Office | 2019 Properties                            
Properties Sold and Held for Sale [Line Items]                            
Rentable square feet (sq ft) | ft²           272                
Contract sales price           $ 33,000                
(Loss) gain on sale           $ (1,046)                
Shopping Center Portfolio and Power Center Portfolio                            
Properties Sold and Held for Sale [Line Items]                            
Number of purchase and sale agreements | agreement             2              
Number of buyers | buyer             2              
Shopping Center Portfolio                            
Properties Sold and Held for Sale [Line Items]                            
(Loss) gain on sale         $ 333,000                  
Frederick Crossing and Frederick County Square                            
Properties Sold and Held for Sale [Line Items]                            
(Loss) gain on sale       $ 9,500                    
Centre at Hagerstown                            
Properties Sold and Held for Sale [Line Items]                            
(Loss) gain on sale     $ (3,500)                      
John Marshall II | Held for sale | Office                            
Properties Sold and Held for Sale [Line Items]                            
Contract sales price per agreement $ 57,000                         $ 63,400
John Marshall II | Disposal group, not discontinued operations | Office | 2020 Properties                            
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)                          
1776 G Street | Disposal group, not discontinued operations | Office | 2019 Properties                            
Properties Sold and Held for Sale [Line Items]                            
Rentable square feet (sq ft) | ft²   262                        
Contract sales price   $ 129,500                        
(Loss) gain on sale   $ 61,007