Investments In Unconsolidated Joint Ventures (Summary Of Financial Position Of Unconsolidated Joint Ventures) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Investments In Unconsolidated Joint Ventures [Abstract]
Rental property, net	$ 442,372	$ 180,254
Loan receivable	43,641	42,276
Other assets	380,353	311,847
Total assets	866,366	534,377
Mortgages and loans payable	387,945	168,908
Other liabilities	51,965	12,141
Partners'/members' capital	426,456	353,328
Total liabilities and partners'/members' capital	$ 866,366	$ 534,377