Equity And Accumulated Other Comprehensive Income, Net (Schedule Of Dividends/Distributions) (Details) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($) $ / shares
February 25, 2015
Dividends Payable [Line Items]
Date dividend/distribution declared	Feb. 25, 2015
Dividend/Distribution payment date	Mar. 31, 2015
May 12, 2015
Dividends Payable [Line Items]
Date dividend/distribution declared	May 12, 2015
Dividend/Distribution payment date	Jun. 30, 2015
August 11, 2015
Dividends Payable [Line Items]
Date dividend/distribution declared	Aug. 11, 2015
Dividend/Distribution payment date	Sep. 30, 2015
Series E Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	$ 15,093
Preferred stock dividend per share amount | $ / shares	$ 1.750
Series E Preferred Units | February 25, 2015
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	$ 5,031
Series E Preferred Units | May 12, 2015
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	5,031
Series E Preferred Units | August 11, 2015
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	5,031
Series F Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	$ 9,069
Preferred stock dividend per share amount | $ / shares	$ 1.656
Series F Preferred Units | February 25, 2015
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	$ 3,023
Series F Preferred Units | May 12, 2015
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	3,023
Series F Preferred Units | August 11, 2015
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	3,023
Series G Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	$ 11,016
Preferred stock dividend per share amount | $ / shares	$ 1.469
Series G Preferred Units | February 25, 2015
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	$ 3,672
Series G Preferred Units | May 12, 2015
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	3,672
Series G Preferred Units | August 11, 2015
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	3,672
Series H Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	$ 20,190
Preferred stock dividend per share amount | $ / shares	$ 1.844
Series H Preferred Units | February 25, 2015
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	$ 6,730
Series H Preferred Units | May 12, 2015
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	6,730
Series H Preferred Units | August 11, 2015
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock	6,730
Common Stock
Dividends Payable [Line Items]
Dividends/Distributions, common units	$ 346,331
Common stock dividend per share amount | $ / shares	$ 3.400
Common Stock | February 25, 2015
Dividends Payable [Line Items]
Dividends/Distributions, common units	$ 115,419
Common Stock | May 12, 2015
Dividends Payable [Line Items]
Dividends/Distributions, common units	115,458
Common Stock | August 11, 2015
Dividends Payable [Line Items]
Dividends/Distributions, common units	$ 115,454