Investments In Unconsolidated Joint Ventures (Summary Of Financial Position Of Unconsolidated Joint Ventures) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Investments In Unconsolidated Joint Ventures [Abstract]
Rental property, net	$ 903,253	$ 931,419
Other assets	212,205	207,903
Total assets	1,115,458	1,139,322
Mortgages and loans payable	686,797	689,412
Other liabilities	67,072	80,746
Partners'/members' capital	361,589	369,164
Total liabilities and partners'/members' capital	$ 1,115,458	$ 1,139,322