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, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Schedule of Equity Method Investments [Line Items]
Revenues, net	$ 32,877	$ 32,810	$ 65,392	$ 66,696
Expenses:
Depreciation and amortization	7,646	8,196	15,495	16,239
Interest, net	2,491	2,980	4,950	6,504
Operating	5,685	5,645	11,785	12,073
Real estate taxes, net	4,522	5,191	9,057	10,133
General and administrative	243	95	312	320
Provision for income taxes	36	37	69	73
Total	20,623	22,144	41,668	45,342
Gain on dispositions	52,061	46,953	69,848	155,998
Net income	13,728	12,572	25,733	26,793
Equity Method Investments [Member]
Expenses:
Gain on dispositions	$ 1,474	$ 1,906	$ 2,009	$ 5,439