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
Mar. 31, 2014
Dec. 31, 2013
Partnership Interest [Member]
   
Summary Balance Sheets of Unconsolidated Joint Ventures [Line Items]    
Land $ 65,242 $ 66,020
Buildings, improvements and fixtures 325,115 327,972
Construction in progress, including land 147,099 86,880
Real estate investment property, at cost, total 537,456 480,872
Accumulated depreciation (33,487) (29,523)
Total rental property, net 503,969 451,349
Cash and cash equivalents 22,678 22,704
Deferred lease costs, net 21,839 19,281
Deferred debt origination costs, net 1,834 1,737
Prepaids and other assets 9,898 9,107
Total assets 560,218 504,178
Mortgages payable 210,932 202,688
Construction trade payables 20,295 19,370
Accounts payable and other liabilities 10,221 8,540
Total liabilities 241,448 230,598
Owners' equity 318,770 273,580
Total liabilities and owners' equity $ 560,218 $ 504,178