Quarterly report pursuant to Section 13 or 15(d)

Discontinued Operations (Narrative) (Details)

v3.21.2
Discontinued Operations (Narrative) (Details)
$ in Thousands, ft² in Millions
3 Months Ended 6 Months Ended 27 Months Ended
Jun. 30, 2021
USD ($)
ft²
property
Jun. 30, 2020
USD ($)
Jun. 30, 2021
USD ($)
ft²
item
property
Jun. 30, 2020
USD ($)
Mar. 31, 2021
USD ($)
ft²
property
Dec. 19, 2019
ft²
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Unrealized gains (losses) on disposition of rental property $ (951) $ (11,929) $ 69 $ (56,997)    
Proceeds from the sale of property     $ 42,702 $ 16,455    
Suburban Office Portfolio [Member]            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Area of property (in square feet) | ft²           6.6
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Suburban Office Portfolio [Member]            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Number of disposal groups | item     2      
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Disposal Group One [Member]            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Unrealized gains (losses) on disposition of rental property $ 1,000   $ (2,100)      
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Properties Disposed One [Member] | Suburban Office Portfolio [Member]            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Number of real estate properties | property 2   2      
Area of property (in square feet) | ft² 0.5   0.5      
Disposal Group, Not Discontinued Operations [Member]            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Number of properties sold | item     14      
Sales proceeds     $ 653,426      
Gain (loss) on sale of property     26,991      
Disposal Group, Not Discontinued Operations [Member] | Suburban Office Portfolio [Member]            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Number of properties sold | property         34  
Sales proceeds         $ 989,000  
Area of property (in square feet) | ft²         5.8  
Disposal Group, Not Discontinued Operations [Member] | Properties Disposed Two [Member] | Suburban Office Portfolio [Member]            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Gain (loss) on sale of property     $ 54,300