Equity Investment in Real Estate and the Managed REITs (Details 4) (Managed REITs, USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Managed REITs
Equity Method Investment Summarized Financial Information Income Statement
Revenues	$ 211,102	$ 207,852	$ 573,969	$ 620,484
Expenses	(198,286)	(174,290)	(528,847)	(523,111)
Net Income from continuing operations	12,816	33,562	45,122	97,373
Net income attributable to Managed REITs	$ 18,303	$ 28,179	$ 45,389	$ 121,099