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Investments in Real Estate - Investments in Existing Properties (Details) - Investments in existing properties - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Investments in real estate properties    
Improvements $ 2,100 $ 3,000
Re-leasing costs 138 323
Recurring capital expenditures   56
Nonrecurring building improvements $ 2,000 $ 2,600