Investments In Unconsolidated Joint Ventures (Summary Of Financial Position Of Unconsolidated Joint Ventures) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Investments In Unconsolidated Joint Ventures [Abstract]
Rental property, net	$ 179,824	$ 143,369
Loan receivable	42,276
Other assets	311,846	71,928
Total assets	533,946	215,297
Mortgages and loans payable	168,908	140,975
Other liabilities	12,203	6,884
Partners'/members' capital (deficit)	352,835	67,438
Total liabilities and partners'/members' capital	$ 533,946	$ 215,297