Annual report pursuant to Section 13 and 15(d)

Investments in Unconsolidated Real Estate Joint Ventures - Management, Leasing and Marketing Fees (Details)

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Investments in Unconsolidated Real Estate Joint Ventures - Management, Leasing and Marketing Fees (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]      
Management, leasing and other services $ 2,496 $ 2,452 $ 3,847
Management and Marketing Fee [Member]      
Schedule of Equity Method Investments [Line Items]      
Management, leasing and other services 2,334 2,310 2,744
Leasing and other fees [Member]      
Schedule of Equity Method Investments [Line Items]      
Management, leasing and other services $ 162 $ 142 $ 1,103