Annual report pursuant to Section 13 and 15(d)

Property Portfolio (summary of the acquired lease intangible amortization) (Details)

v3.8.0.1
Property Portfolio (summary of the acquired lease intangible amortization) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Leases, Acquired-in-Place [Member]    
Property, Plant and Equipment [Line Items]    
Finite-Lived Intangible Assets, Accumulated Amortization $ 1,542 $ 35
Lease Costs [Member]    
Property, Plant and Equipment [Line Items]    
Finite-Lived Intangible Assets, Accumulated Amortization 530 8
Above Market Leases [Member]    
Property, Plant and Equipment [Line Items]    
Finite-Lived Intangible Assets, Accumulated Amortization 220 0
Below Market Lease [Member]    
Property, Plant and Equipment [Line Items]    
Finite-Lived Intangible Assets, Accumulated Amortization (97) (1)
market ground lease [Member]    
Property, Plant and Equipment [Line Items]    
Finite-Lived Intangible Assets, Accumulated Amortization $ 6 $ 0