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Real Estate (Real Estate Held for Sale) (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2020
USD ($)
property
Dec. 31, 2019
USD ($)
property
Real Estate [Abstract]    
Number of properties classified as held for sale | property 6 11
Number of properties sold | property 5  
Land and improvements $ 3,817 $ 7,022
Building and improvements 7,972 10,888
Real estate held-for-sale 11,789 17,910
Less accumulated depreciation and amortization (3,953) (5,334)
Less impairment (3,338) (1,758)
Real estate held for sale $ 4,498 $ 10,818