Equity And Accumulated Other Comprehensive Loss, Net (Schedule Of Dividends) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended					6 Months Ended	3 Months Ended			6 Months Ended	0 Months Ended	3 Months Ended		6 Months Ended		3 Months Ended				6 Months Ended
	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2013 Series E Cumulative Convertible Preferred Units [Member]	Mar. 31, 2013 Series E Cumulative Convertible Preferred Units [Member]		Jun. 30, 2013 Series E Cumulative Convertible Preferred Units [Member]	Jun. 30, 2013 Series F Cumulative Convertible Preferred Units [Member]	Mar. 31, 2013 Series F Cumulative Convertible Preferred Units [Member]		Jun. 30, 2013 Series F Cumulative Convertible Preferred Units [Member]	Apr. 09, 2013 Series G Cumulative Convertible Preferred Units [Member] [Member]	Jun. 30, 2013 Series G Cumulative Convertible Preferred Units [Member] [Member]		Jun. 30, 2013 Series G Cumulative Convertible Preferred Units [Member] [Member]		Jun. 30, 2013 Common Stock [Member]		Mar. 31, 2013 Common Stock [Member]		Jun. 30, 2013 Common Stock [Member]
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Date dividend/distribution declared	May 01, 2013	Feb. 12, 2013
Dividend/Distribution payable date	Jun. 28, 2013	Mar. 29, 2013
Dividends/Distributions, preferred stock/units			$ 5,031	$ 5,031	[1]	$ 10,062	$ 3,023	$ 3,023	[2]	$ 6,046		$ 3,345	[3],[4]	$ 3,345	[3]
Dividends/Distributions, common stock/units																$ 100,169	[5]	$ 100,165	[5]	$ 200,334	[5]
Preferred stock dividend per share amount						$ 1.750				$ 1.656	$ 1.46875			$ 1.469
Common stock dividend per share amount																				$ 3.120
Shares issued upon conversion												0.7532		0.7532
Preferred stock, redemption price per share												$ 25.00		$ 25.00

[1] $1.750 annual rate of dividend per share.

[2] $1.656 annual rate of dividend per share.

[3] $1.469 annual rate of dividend per share.

[4] Represents a pro rata dividend from and including the original issue date to and including June 30, 2013.

[5] $3.120 annual rate of dividend per share.