Investment In Real Estate Joint Ventures And Partnerships (Combined Condensed Statements Of Operations) (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Investment In Real Estate Joint Ventures And Partnerships [Line Items]
Revenues, net	$ 138,565	$ 134,118	$ 405,617	$ 400,308
Depreciation and amortization	38,872	35,921	114,499	107,466
Interest, net	35,814	36,579	110,005	111,124
Operating	25,422	24,658	75,242	74,535
Real estate taxes, net	17,213	14,796	48,894	46,422
General and administrative	5,777	6,443	18,939	19,096
Provision for income taxes	471	(23)	229	93
Impairment loss	35,344	4,941	55,006	21,002
(Loss) Income from Continuing Operations	(23,493)	17,328	(8,925)	36,661
Loss on sale of property	(6)	(126)	(239)	(689)
Net (loss) income	(35,958)	19,241	(15,831)	43,033
Equity Method Investments [Member]
Investment In Real Estate Joint Ventures And Partnerships [Line Items]
Revenues, net	52,501	48,002	154,693	142,609
Depreciation and amortization	16,507	15,087	51,051	45,730
Interest, net	9,557	8,613	28,394	26,754
Operating	8,961	8,296	26,791	24,441
Real estate taxes, net	6,001	5,529	18,607	18,008
General and administrative	865	974	2,834	2,871
Provision for income taxes	85	53	286	198
Impairment loss	26,718		28,776	231
(Loss) Income from Continuing Operations	68,694	38,552	156,739	118,233
Gain on land and merchant development sales		184		184
Loss on sale of property			(21)	(3)
Net (loss) income	$ (16,193)	$ 9,634	$ (2,067)	$ 24,557