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, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Management, Leasing and Marketing Fees [Line Items]      
Total Management, Leasing and Marketing Fees Paid by Unconsolidated Joint Ventures $ 3,042 $ 2,121 $ 2,081
Marketing Fee [Member]
     
Management, Leasing and Marketing Fees [Line Items]      
Total Management, Leasing and Marketing Fees Paid by Unconsolidated Joint Ventures 433 163 154
Development Fee [Member]
     
Management, Leasing and Marketing Fees [Line Items]      
Total Management, Leasing and Marketing Fees Paid by Unconsolidated Joint Ventures 427 0 0
Management and Leasing Fee [Member]
     
Management, Leasing and Marketing Fees [Line Items]      
Total Management, Leasing and Marketing Fees Paid by Unconsolidated Joint Ventures 2,102 1,958 1,927
Loan Guarantee Fee [Member]
     
Management, Leasing and Marketing Fees [Line Items]      
Total Management, Leasing and Marketing Fees Paid by Unconsolidated Joint Ventures $ 80 $ 0 $ 0