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Acquisitions - Variable Interest Entities (Details) - VIE
$ in Thousands
Jun. 30, 2017
days
Jan. 13, 2017
USD ($)
Variable Interest Entity [Line Items]    
Number of days to complete tax-deferred exchange | days 180  
Main Street Promenade    
Variable Interest Entity [Line Items]    
Amount loaned to VIE for acquisition | $   $ 87,452