Equity And Accumulated Other Comprehensive Income (Loss), Net (Schedule Of Dividends) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended			12 Months Ended	3 Months Ended												12 Months Ended	3 Months Ended
	Mar. 31, 2014 Installment 1 FY2014 [Member]	Mar. 31, 2014 Series E Cumulative Convertible Preferred Stock/Units [Member]		Dec. 31, 2013 Series E Cumulative Convertible Preferred Stock/Units [Member]	Mar. 31, 2014 Series E Cumulative Convertible Preferred Stock/Units [Member] Installment 1 FY2014 [Member]		Mar. 31, 2014 Series F Cumulative Convertible Preferred Stock/Units [Member]		Mar. 31, 2014 Series F Cumulative Convertible Preferred Stock/Units [Member] Installment 1 FY2014 [Member]		Mar. 31, 2014 Series G Cumulative Convertible Preferred Stock/Units [Member]		Mar. 31, 2014 Series G Cumulative Convertible Preferred Stock/Units [Member] Installment 1 FY2014 [Member]		Mar. 31, 2014 Common Stock [Member]		Dec. 31, 2011 Common Stock [Member]	Mar. 31, 2014 Common Stock [Member] Installment 1 FY2014 [Member]
Dividends Payable [Line Items]
Date dividend/distribution declared	Feb. 11, 2014
Dividend/Distribution payable date	Mar. 31, 2014
Dividends/Distributions, preferred stock/units		$ 5,031	[1]		$ 5,031	[1]	$ 3,023	[2]	$ 3,023	[2]	$ 3,672	[3]	$ 3,672	[3]
Dividends/Distributions, common stock/units															$ 106,743	[4]		$ 106,743	[4]
Preferred stock dividend per share amount		$ 1.750		$ 1.750			$ 1.656				$ 1.469
Common stock dividend per share amount																	$ 3.320

[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] $3.320 annual rate of dividend per share.