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Dispositions and Impairment - Additional Information (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
USD ($)
property
Jun. 30, 2020
USD ($)
property
Jun. 30, 2021
USD ($)
property
Jun. 30, 2020
USD ($)
impairment_charge
property
Dec. 31, 2020
property
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Number of properties disposed | property 135   135    
Debt satisfaction gain       $ 1,393  
Number of real estate properties held for sale | property 3   3   2
Number of impairment charges | impairment_charge       1  
Impairment charges $ 0 $ 1,617 $ 0 $ 1,617  
Properties in Charleston, SC | Disposal Group, Disposed of by Sale, Not Discontinued Operations          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Number of properties disposed | property   1   1  
Transferred Property | Office Building          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Aggregate gross disposition price     183,427 $ 74,064  
Sold Properties          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Gain on sale of properties     $ 88,645 $ 20,998