Equity and Accumulated Other Comprehensive Loss, Net (Schedule of Accumulated Other Comprehensive Loss, Net) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ 10,858,210	$ 11,049,450
Reclassification of foreign currency translation adjustment due to deconsolidation of Ascenty	21,687
Ending balance	10,608,100	10,858,210
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(158,649)	(147,370)
Net current period change	22,015	(11,279)
Reclassification of foreign currency translation adjustment due to deconsolidation of Ascenty	21,687
Reclassification to interest expense from interest rate swaps	0	0
Ending balance	(114,947)	(158,649)
Cash flow hedge adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	17,264	13,200
Net current period change	(8,839)	7,890
Reclassification to interest expense from interest rate swaps	(7,138)	(3,826)
Ending balance	1,287	17,264
Accumulated other comprehensive income (loss), net
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(115,647)	(108,432)
Net current period change	13,176	(3,389)
Reclassification of foreign currency translation adjustment due to deconsolidation of Ascenty	21,687
Reclassification to interest expense from interest rate swaps	(7,138)	(3,826)
Ending balance	(87,922)	(115,647)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	25,738	25,738
Net current period change	0	0
Reclassification of foreign currency translation adjustment due to deconsolidation of Ascenty	0
Reclassification to interest expense from interest rate swaps	0	0
Ending balance	$ 25,738	$ 25,738