Quarterly report pursuant to Section 13 or 15(d)

Real Estate Impairment - Impairment Expenses (Details)

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Real Estate Impairment - Impairment Expenses (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Impaired Long-Lived Assets Held and Used [Line Items]    
Impairment of assets held for sale $ 0 $ 600
Columbia Fire Station    
Impaired Long-Lived Assets Held and Used [Line Items]    
Impairment of assets held for sale $ 0 $ 600