Equity and Accumulated Other Comprehensive Loss, Net (Schedule of Dividends) (Details) - USD ($) $ / shares in Units, $ in Thousands						12 Months Ended
	Aug. 24, 2015	Mar. 26, 2014	Jun. 28, 2013	Apr. 09, 2013	Sep. 15, 2011	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Feb. 26, 2013
Series D Preferred Stock and Unit
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units						$ 0	$ 0	$ 0
Annual rate of dividend per share (in dollars per share)						$ 1.375
Shares issued upon conversion									0.6360
Series D Preferred Stock and Unit | Installment 1 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								0
Series D Preferred Stock and Unit | Installment 2 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								0
Series D Preferred Stock and Unit | Installment 3 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								0
Series D Preferred Stock and Unit | Installment 4 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								0
Series D Preferred Stock and Unit | Installment 1 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units							0
Series D Preferred Stock and Unit | Installment 2 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units							0
Series D Preferred Stock and Unit | Installment 3 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units							0
Series D Preferred Stock and Unit | Installment 4 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units							0
Series D Preferred Stock and Unit | Installment 1 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units						$ 0
Series D Preferred Stock and Unit | Installment 2 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units						0
Series D Preferred Stock and Unit | Installment 3 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units						0
Series D Preferred Stock and Unit | Installment 4 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units						0
Series E Preferred Stock and Unit
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units						$ 20,124	$ 20,124	20,124
Annual rate of dividend per share (in dollars per share)						$ 1.75
Preferred stock, dividend rate					7.00%	7.00%	7.00%
Shares issued upon conversion						0.8378
Series E Preferred Stock and Unit | Installment 1 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								5,031
Series E Preferred Stock and Unit | Installment 2 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								5,031
Series E Preferred Stock and Unit | Installment 3 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								5,031
Series E Preferred Stock and Unit | Installment 4 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								5,031
Series E Preferred Stock and Unit | Installment 1 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units							$ 5,031
Series E Preferred Stock and Unit | Installment 2 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units							5,031
Series E Preferred Stock and Unit | Installment 3 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units							5,031
Series E Preferred Stock and Unit | Installment 4 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units							5,031
Series E Preferred Stock and Unit | Installment 1 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units						$ 5,031
Series E Preferred Stock and Unit | Installment 2 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units						5,031
Series E Preferred Stock and Unit | Installment 3 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units						5,031
Series E Preferred Stock and Unit | Installment 4 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units						5,031
Series F Preferred Stock and Unit
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units						$ 12,092	$ 12,092	12,092
Annual rate of dividend per share (in dollars per share)						$ 1.65625
Preferred stock, dividend rate						6.625%	6.625%
Shares issued upon conversion						0.6843
Series F Preferred Stock and Unit | Installment 1 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								3,023
Series F Preferred Stock and Unit | Installment 2 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								3,023
Series F Preferred Stock and Unit | Installment 3 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								3,023
Series F Preferred Stock and Unit | Installment 4 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								3,023
Series F Preferred Stock and Unit | Installment 1 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units							$ 3,023
Series F Preferred Stock and Unit | Installment 2 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units							3,023
Series F Preferred Stock and Unit | Installment 3 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units							3,023
Series F Preferred Stock and Unit | Installment 4 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units							3,023
Series F Preferred Stock and Unit | Installment 1 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units						$ 3,023
Series F Preferred Stock and Unit | Installment 2 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units						3,023
Series F Preferred Stock and Unit | Installment 3 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units						3,023
Series F Preferred Stock and Unit | Installment 4 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units						3,023
Series G Preferred Stock and Unit
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units						$ 14,688	$ 14,688	10,689
Annual rate of dividend per share (in dollars per share)			$ 0.334550			$ 1.46875
Preferred stock, dividend rate				5.875%		5.875%	5.875%
Shares issued upon conversion						0.7532
Series G Preferred Stock and Unit | Installment 1 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								0
Series G Preferred Stock and Unit | Installment 2 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								3,345
Series G Preferred Stock and Unit | Installment 3 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								3,672
Series G Preferred Stock and Unit | Installment 4 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								3,672
Series G Preferred Stock and Unit | Installment 1 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units							$ 3,672
Series G Preferred Stock and Unit | Installment 2 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units							3,672
Series G Preferred Stock and Unit | Installment 3 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units							3,672
Series G Preferred Stock and Unit | Installment 4 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units							3,672
Series G Preferred Stock and Unit | Installment 1 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units						$ 3,672
Series G Preferred Stock and Unit | Installment 2 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units						3,672
Series G Preferred Stock and Unit | Installment 3 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units						3,672
Series G Preferred Stock and Unit | Installment 4 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units						3,672
Series H Preferred Stock and Unit
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units						$ 26,920	$ 20,564	0
Annual rate of dividend per share (in dollars per share)						$ 1.84375
Preferred stock, dividend rate		7.375%				7.375%	7.375%
Shares issued upon conversion						0.9632
Series H Preferred Stock and Unit | Installment 1 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								0
Series H Preferred Stock and Unit | Installment 2 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								0
Series H Preferred Stock and Unit | Installment 3 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								0
Series H Preferred Stock and Unit | Installment 4 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								0
Series H Preferred Stock and Unit | Installment 1 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units							$ 0
Series H Preferred Stock and Unit | Installment 2 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units							7,104
Series H Preferred Stock and Unit | Installment 3 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units							6,730
Series H Preferred Stock and Unit | Installment 4 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units							6,730
Series H Preferred Stock and Unit | Installment 1 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units						$ 6,730
Series H Preferred Stock and Unit | Installment 2 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units						6,730
Series H Preferred Stock and Unit | Installment 3 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units						6,730
Series H Preferred Stock and Unit | Installment 4 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units						6,730
Series I Preferred Stock and Unit
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units						$ 5,600	$ 0	0
Annual rate of dividend per share (in dollars per share)						$ 1.588
Preferred stock, dividend rate	6.35%					6.35%	0.00%
Shares issued upon conversion						0.76231
Series I Preferred Stock and Unit | Installment 1 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								0
Series I Preferred Stock and Unit | Installment 2 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								0
Series I Preferred Stock and Unit | Installment 3 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								0
Series I Preferred Stock and Unit | Installment 4 Year One
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units								0
Series I Preferred Stock and Unit | Installment 1 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units							$ 0
Series I Preferred Stock and Unit | Installment 2 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units							0
Series I Preferred Stock and Unit | Installment 3 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units							0
Series I Preferred Stock and Unit | Installment 4 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units							0
Series I Preferred Stock and Unit | Installment 1 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units						$ 0
Series I Preferred Stock and Unit | Installment 2 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units						0
Series I Preferred Stock and Unit | Installment 3 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units						0
Series I Preferred Stock and Unit | Installment 4 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, preferred stock/units						5,600
Common stock and common unit
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units						470,748	444,103	$ 400,701
Common stock dividend per share amount (in dollars per share)								$ 3.120
Common stock and common unit | Installment 1 Year One
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units								$ 100,165
Common stock and common unit | Installment 2 Year One
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units								100,169
Common stock and common unit | Installment 3 Year One
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units								100,180
Common stock and common unit | Installment 4 Year One
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units								$ 100,187
Common stock and common unit | Installment 1 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units							106,743
Common stock and common unit | Installment 2 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units							112,357
Common stock and common unit | Installment 3 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units							112,465
Common stock and common unit | Installment 4 Year Two
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units							$ 112,538
Common stock dividend per share amount (in dollars per share)							$ 3.320
Common stock and common unit | Installment 1 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units						115,419
Common stock and common unit | Installment 2 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units						115,458
Common stock and common unit | Installment 3 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units						115,454
Common stock and common unit | Installment 4 Year Three
Dividends Payable [Line Items]
Dividends/Distributions, common stock/units						$ 124,417
Common stock dividend per share amount (in dollars per share)						$ 3.400