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Real Estate (Real Estate Held for Sale) (Details)
$ in Thousands
6 Months Ended
Jun. 30, 2020
USD ($)
property
Dec. 31, 2019
USD ($)
property
Real Estate [Abstract]    
Number of properties classified as held for sale | property 4 9
Number of properties sold | property 5  
Land and improvements $ 2,471 $ 5,676
Building and improvements 4,647 7,562
Real estate held-for-sale 7,118 13,238
Less accumulated depreciation and amortization (2,765) (4,144)
Less impairment (738) (1,107)
Real estate held for sale $ 3,615 $ 7,987