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, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Management, Leasing and Marketing Fees [Line Items]        
Fees paid by unconsolidated joint ventures $ 1,225 $ 888 $ 2,548 $ 2,870
Development and Leasing Fee [Member]
       
Management, Leasing and Marketing Fees [Line Items]        
Fees paid by unconsolidated joint ventures 624 (6) 702 57
Loan Guarantee Fee [Member]
       
Management, Leasing and Marketing Fees [Line Items]        
Fees paid by unconsolidated joint ventures 23 40 209 121
Management Fee [Member]
       
Management, Leasing and Marketing Fees [Line Items]        
Fees paid by unconsolidated joint ventures 470 761 1,316 2,391
Marketing Fee [Member]
       
Management, Leasing and Marketing Fees [Line Items]        
Fees paid by unconsolidated joint ventures $ 108 $ 93 $ 321 $ 301