Investment In Real Estate Joint Ventures And Partnerships (Schedule Of Combined Condensed Statements Of Operations) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Schedule of Equity Method Investments [Line Items]
Revenues, net	$ 32,515	$ 33,886
Expenses:
Depreciation and amortization	7,849	8,043
Interest, net	2,459	3,524
Operating	6,100	6,428
Real estate taxes, net	4,535	4,942
General and administrative	69	225
Provision for income taxes	33	36
Total	21,045	23,198
Gain on dispositions	17,787	109,045
Net income	12,005	14,221
Equity Method Investments [Member]
Expenses:
Gain on dispositions	$ 535	$ 3,533