Equity and Accumulated Other Comprehensive Income, Net (Schedule of Dividends/Distributions) (Details) - USD ($) $ / shares in Units, $ in Thousands		9 Months Ended
	Sep. 15, 2016	Sep. 30, 2016	Dec. 31, 2015
February 17, 2016
Dividends Payable [Line Items]
Date dividend/distribution declared		Feb. 17, 2016
Dividend/Distribution payment date		Mar. 31, 2016
May 11, 2016
Dividends Payable [Line Items]
Date dividend/distribution declared		May 11, 2016
Dividend/Distribution payment date		Jun. 30, 2016
August 10, 2016
Dividends Payable [Line Items]
Date dividend/distribution declared		Aug. 10, 2016
Dividend/Distribution payment date		Sep. 30, 2016
Series E Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock		$ 10,062
Preferred stock dividend per share amount ($ per share/unit)		$ 1.75
Redemption price per share (in dollars per share)	$ 25.35972
Preferred Stock, liquidation preference ($ per share/unit)	$ 25.00	$ 25	$ 25
Accrued and unpaid dividends up to but not including the redemption date	$ 4,100
Redemption premium	$ 10,300	$ 10,300
Series E Preferred Units | February 17, 2016
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock		5,031
Series E Preferred Units | May 11, 2016
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock		5,031
Series E Preferred Units | August 10, 2016
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock		0
Series F Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock		$ 9,069
Preferred stock dividend per share amount ($ per share/unit)		$ 1.656
Preferred Stock, liquidation preference ($ per share/unit)		$ 25	25
Series F Preferred Units | February 17, 2016
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock		$ 3,023
Series F Preferred Units | May 11, 2016
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock		3,023
Series F Preferred Units | August 10, 2016
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 ($ per share/unit)		$ 1.469
Preferred Stock, liquidation preference ($ per share/unit)		$ 25	25
Series G Preferred Units | February 17, 2016
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock		$ 3,672
Series G Preferred Units | May 11, 2016
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock		3,672
Series G Preferred Units | August 10, 2016
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 ($ per share/unit)		$ 1.844
Preferred Stock, liquidation preference ($ per share/unit)		$ 25	25
Series H Preferred Units | February 17, 2016
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock		$ 6,730
Series H Preferred Units | May 11, 2016
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock		6,730
Series H Preferred Units | August 10, 2016
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock		6,730
Series I Preferred Units
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock		$ 11,907
Preferred stock dividend per share amount ($ per share/unit)		$ 1.588
Preferred Stock, liquidation preference ($ per share/unit)		$ 25	$ 25
Series I Preferred Units | February 17, 2016
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock		$ 3,969
Series I Preferred Units | May 11, 2016
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock		3,969
Series I Preferred Units | August 10, 2016
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock		3,969
Common Stock
Dividends Payable [Line Items]
Dividends/Distributions, common units		$ 387,537
Common stock dividend per share amount ($ per share/unit)		$ 3.52
Common Stock | February 17, 2016
Dividends Payable [Line Items]
Dividends/Distributions, common units		$ 129,064
Common Stock | May 11, 2016
Dividends Payable [Line Items]
Dividends/Distributions, common units		129,188
Common Stock | August 10, 2016
Dividends Payable [Line Items]
Dividends/Distributions, common units		$ 129,285