Investment In Real Estate Joint Ventures And Partnerships (Schedule Of Combined Condensed Statements Of Operations) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Schedule of Equity Method Investments [Line Items]
Revenues, net	$ 34,738,000	$ 35,922,000
Expenses:
Depreciation and amortization	9,013,000	9,381,000
Interest, net	2,967,000	4,008,000
Operating	6,118,000	7,603,000
Real estate taxes, net	4,268,000	4,492,000
General and administrative	368,000	143,000
Provision for income taxes	7,000	59,000
Impairment loss	0	1,303,000
Total	22,741,000	26,989,000
Gain on dispositions	15,763,000	45,157,000
Net income	11,997,000	9,306,000
Equity Method Investments [Member]
Expenses:
Gain on sale of non-operating property	$ 0	$ 373,000