Investment In Real Estate Joint Ventures And Partnerships (Schedule Of Combined Condensed Statements Of Operations) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Schedule of Equity Method Investments [Line Items]
Revenues, net	$ 33,886	$ 34,738
Expenses:
Depreciation and amortization	8,043	9,013
Interest, net	3,524	2,967
Operating	6,428	6,118
Real estate taxes, net	4,942	4,268
General and administrative	225	368
Provision for income taxes	36	7
Total	23,198	22,741
Gain on dispositions	109,045	15,763
Net income	14,221	11,997
Equity Method Investments [Member]
Expenses:
Gain on dispositions	$ 3,533	$ 0