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
Mar. 31, 2016
Mar. 31, 2015
Management, Leasing and Marketing Fees [Line Items]    
Fees received $ 1,121 $ 1,283
Development and Leasing Fee [Member]    
Management, Leasing and Marketing Fees [Line Items]    
Fees received 192 581
Loan Guarantee Fee [Member]    
Management, Leasing and Marketing Fees [Line Items]    
Fees received 182 196
Management and Marketing Fee [Member]    
Management, Leasing and Marketing Fees [Line Items]    
Fees received $ 747 $ 506