Investment In Real Estate Joint Ventures And Partnerships (Schedule Of Combined Condensed Statements Of Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Schedule of Equity Method Investments [Line Items]
Revenues, net	$ 130,191	$ 121,995	$ 257,783	$ 239,822
Expenses:
Depreciation and amortization	36,630	35,513	77,254	71,691
Interest, net	24,310	27,025	48,890	42,464
Operating	23,920	23,498	48,535	46,532
Real estate taxes, net	16,358	14,376	31,007	27,979
General and administrative	5,820	6,184	11,733	12,848
Provision for income taxes	(2,081)	147	(1,601)	(30)
Impairment loss	0	165	0	221
Operating income	31,803	21,996	54,930	62,974
Unconsolidated Real Estate Joint Ventures [Member]
Schedule of Equity Method Investments [Line Items]
Revenues, net	37,101	41,099	74,869	83,260
Expenses:
Depreciation and amortization	11,096	11,558	21,013	23,579
Interest, net	5,848	7,415	11,760	14,960
Operating	6,318	7,407	13,134	13,561
Real estate taxes, net	4,566	5,013	9,446	9,596
General and administrative	424	164	530	450
Provision for income taxes	216	86	283	148
Impairment loss	0	13	0	1,828
Total	28,468	31,656	56,166	64,122
Operating income	$ 8,633	$ 9,443	$ 18,703	$ 19,138