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Indebtedness - Narrative (Details)
$ in Thousands
Mar. 31, 2019
USD ($)
property
Dec. 31, 2018
USD ($)
Debt Instrument [Line Items]    
Senior unsecured notes, net $ 250,000  
Real estate properties, net 569,009 $ 763,674
Mortgage notes payable, net $ 26,288 $ 26,482
Mortgage notes    
Debt Instrument [Line Items]    
Number of real estate properties secured by mortgage | property 1  
Real estate properties, net $ 44,300  
Mortgage notes payable, net $ 26,300