Investments In Unconsolidated Joint Ventures (Summary Of Financial Position Of Unconsolidated Joint Ventures) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Investments In Unconsolidated Joint Ventures [Abstract]
Rental property, net	$ 1,597,359	$ 1,534,812
Other assets	421,753	398,222
Total assets	2,019,112	1,933,034
Mortgages and loans payable	1,193,461	1,060,020
Other liabilities	215,077	211,340
Partners'/members' capital	610,574	661,674
Total liabilities and partners'/members' capital	$ 2,019,112	$ 1,933,034