Real Estate And Accumulated Depreciation (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Investment in Real Estate:
Beginning balance	$ 2,719,716	$ 2,671,002	$ 3,509,744
Additions	2,531,312	171,542	184,106
Reclassification	0	0	622
Impairment/write-offs	(57,596)	(22,286)	(99,460)
Sales/disposals	(11,966)	(100,542)	(924,010)
Ending balance	5,181,466	2,719,716	2,671,002
Accumulated Depreciation:
Beginning balance	591,105	507,208	637,840
Depreciation expense	211,434	110,464	127,273
Reclassification	0	0	373
Impairment/write-offs	(37,647)	(22,286)	(99,460)
Sales/disposals	(3,110)	(4,281)	(158,818)
Ending balance	761,782	591,105	507,208
Investment in Real Estate, net	$ 4,419,684	$ 2,128,611	$ 2,163,794