Investment In Real Estate Joint Ventures And Partnerships (Schedule Of Combined Condensed Statements Of Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Schedule of Equity Method Investments [Line Items]
Revenues, net	$ 26,817	$ 32,877	$ 60,556	$ 65,392
Expenses:
Depreciation and amortization	8,902	7,646	17,664	15,495
Interest, net	2,334	2,491	4,752	4,950
Operating	5,462	5,685	12,573	11,785
Real estate taxes, net	4,215	4,522	8,615	9,057
General and administrative	233	243	338	312
Provision for income taxes	34	36	70	69
Total	21,180	20,623	44,012	41,668
Gain on dispositions	7,898	52,061	21,474	69,848
Net income	7,727	13,728	63,333	25,733
Equity Method Investments [Member]
Expenses:
Gain on dispositions	$ 2,090	$ 1,474	$ 46,789	$ 2,009