Quarterly report pursuant to Section 13 or 15(d)

Investments in Unconsolidated Real Estate Joint Ventures (Summary Balance Sheets for Unconsolidated Joint Ventures) (Details)

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Investments in Unconsolidated Real Estate Joint Ventures (Summary Balance Sheets for Unconsolidated Joint Ventures) (Details) (Partnership Interest [Member], USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Partnership Interest [Member]
    
Summary Balance Sheets of Unconsolidated Joint Ventures [Line Items]    
Land $ 94,961 $ 96,455
Buildings, improvements and fixtures 493,100 493,424
Construction in progress, including land 90,413 16,338
Real Estate Investment Property, at Cost, Total 678,474 606,217
Accumulated depreciation (74,642) (62,547)
Total rental property, net 603,832 543,670
Assets held for sale (1) 0 [1] 1,828 [1]
Cash and cash equivalents 16,511 21,879
Deferred lease costs, net 21,285 24,411
Deferred debt origination costs, net 4,025 5,213
Prepaid and other assets 26,181 25,350
Total assets 671,834 622,351
Mortgages payable 336,338 325,192
Construction trade payables 10,842 21,734
Accounts payable and other liabilities 14,830 31,944
Total liabilities 362,010 378,870
Owners' equity 309,824 243,481
Total liabilities and owners' equity $ 671,834 $ 622,351
[1] (1) Assets related to our Deer Park Warehouse joint venture that were sold in March 2013.