Quarterly report pursuant to Section 13 or 15(d)

Real Estate - Assets Held for Sale (Details)

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Real Estate - Assets Held for Sale (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Assets    
Assets held for sale $ 22,111 $ 9,135
Disposal Group, Including Discontinued Operation, Liabilities [Abstract]    
Loans payable 12,423 792
Held-for-sale, Not Discontinued Operations    
Assets    
Investment properties, net 13,486 0
Rents and other tenant receivables, net 611 0
Above market lease, net 420 0
Deferred costs and other assets, net 307 0
Assets held for sale 14,824 0
Disposal Group, Including Discontinued Operation, Liabilities [Abstract]    
Loans payable 11,276 0
Below market lease, net 6 0
Accounts payable 522 0
Total liabilities associated with assets held for sale 11,804 0
Held-for-sale, Discontinued Operations    
Assets    
Investment properties, net 7,287 9,135
Assets held for sale 7,287 9,135
Disposal Group, Including Discontinued Operation, Liabilities [Abstract]    
Loans payable 581 747
Accounts payable 38 45
Total liabilities associated with assets held for sale $ 619 $ 792