Investment In Real Estate Joint Ventures And Partnerships (Schedule Of Combined Condensed Statements Of Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Schedule of Equity Method Investments [Line Items]
Revenues, net	$ 32,810	$ 36,061	$ 66,696	$ 70,799
Expenses:
Depreciation and amortization	8,196	8,791	16,239	17,804
Interest, net	2,980	3,110	6,504	6,077
Operating	5,645	5,810	12,073	11,928
Real estate taxes, net	5,191	5,451	10,133	9,719
General and administrative	95	294	320	662
Provision for income taxes	37	40	73	47
Total	22,144	23,496	45,342	46,237
Gain on dispositions	46,953	32,224	155,998	47,987
Net income	12,572	16,461	26,793	28,458
Equity Method Investments [Member]
Expenses:
Gain on dispositions	$ 1,906	$ 3,896	$ 5,439	$ 3,896