Investment In Real Estate Joint Ventures And Partnerships (Schedule Of Combined Condensed Statements Of Operations) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Schedule of Equity Method Investments [Line Items]
Revenues, net	$ 33,875,000	$ 37,549,000	$ 103,943,000	$ 111,254,000
Expenses:
Depreciation and amortization	9,079,000	9,369,000	29,065,000	27,952,000
Interest, net	3,300,000	4,199,000	12,930,000	12,851,000
Operating	5,922,000	6,338,000	19,883,000	19,574,000
Real estate taxes, net	4,223,000	4,678,000	13,209,000	13,935,000
General and administrative	233,000	124,000	688,000	659,000
Provision for income taxes	42,000	34,000	70,000	145,000
Impairment loss	0	0	1,303,000	7,487,000
Total	22,799,000	24,742,000	77,148,000	82,603,000
Gain on dispositions	22,108,000	13,232,000	68,298,000	43,917,000
Net income	11,147,000	12,807,000	39,830,000	30,044,000
Equity Method Investments [Member]
Expenses:
Gain on sale of non-operating property	0	0	373,000	0
Gain on dispositions	$ 71,000	$ 0	$ 12,662,000	$ 1,393,000