Investments In Unconsolidated Joint Ventures (Summary Of Financial Position Of Unconsolidated Joint Ventures) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Investments In Unconsolidated Joint Ventures [Abstract]
Rental property, net	$ 736,487	$ 180,254
Loan receivable	44,459	42,276
Other assets	434,714	311,847
Total assets	1,215,660	534,377
Mortgages and loans payable	600,473	168,908
Other liabilities	71,552	12,141
Partners'/members' capital	543,635	353,328
Total liabilities and partners'/members' capital	$ 1,215,660	$ 534,377