Equity and Accumulated Other Comprehensive Loss, Net (Schedule of Dividends Declared and Payable) (Details) (USD $) In Thousands, except Per Share data	3 Months Ended				6 Months Ended
	Jun. 30, 2011		Mar. 31, 2011		Jun. 30, 2011
Series C Preferred Stock [Member]
Date distribution declared	Apr. 25, 2011		Feb. 10, 2011
Distribution payable date	Jun. 30, 2011		Mar. 31, 2011
Dividends/Distributions, preferred stock/units	$ 1,441	[1]	$ 1,832	[1]	$ 3,273	[1]
Preferred Units, annual rate of distribution per unit					$ 1.094
Series D Preferred Stock [Member]
Date distribution declared	Apr. 25, 2011		Feb. 10, 2011
Distribution payable date	Jun. 30, 2011		Mar. 31, 2011
Dividends/Distributions, preferred stock/units	3,272	[2]	4,690	[2]	7,962	[2]
Preferred Units, annual rate of distribution per unit					$ 1.375
Common Stock [Member]
Date distribution declared	Apr. 25, 2011		Feb. 10, 2011
Distribution payable date	Jun. 30, 2011		Mar. 31, 2011
Dividends/Distributions, common stock/units	$ 67,031	[3]	$ 62,459	[3]	$ 129,490	[3]
Common Units, annual rate of distribution per unit					$ 2.720

[1] $1.094 annual rate of dividend per share.

[2] $1.375 annual rate of dividend per share.

[3] $2.720 annual rate of dividend per share.