Investment In Real Estate Joint Ventures And Partnerships (Schedule Of Combined Condensed Statements Of Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Schedule of Equity Method Investments [Line Items]
Revenues, net	$ 33,853	$ 33,626	$ 99,245	$ 100,322
Expenses:
Depreciation and amortization	7,914	7,925	23,409	24,164
Interest, net	2,336	2,974	7,286	9,478
Operating	6,035	6,001	17,820	18,074
Real estate taxes, net	4,891	4,728	13,948	14,861
General and administrative	110	253	422	573
Provision for income taxes	34	33	103	106
Total	21,320	21,914	62,988	67,256
Gain on dispositions	74,115	17,079	143,963	173,077
Net income	12,533	15,764	38,266	42,557
Equity Method Investments [Member]
Expenses:
Gain on dispositions	$ 0	$ 4,052	$ 2,009	$ 9,491