Quarterly report pursuant to Section 13 or 15(d)

Investments in Unconsolidated Real Estate Joint Ventures (Joint Venture Fees) (Details)

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Investments in Unconsolidated Real Estate Joint Ventures (Joint Venture Fees) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Management, Leasing and other services [Line Items]        
Fees received $ 583 $ 588 $ 1,826 $ 1,776
Management and Marketing Fee [Member]        
Management, Leasing and other services [Line Items]        
Fees received 571 564 1,704 1,676
Leasing and other fees [Member]        
Management, Leasing and other services [Line Items]        
Fees received $ 12 $ 24 $ 122 $ 100