Goodwill and Other Intangibles (Details 3) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Amortizable Intangible Assets
Less: accumulated amortization	$ (168,840)	$ (75,783)
Indefinite Lived Intangible Assets Including Goodwill
Indefinite-lived intangible assets	354,183	333,107
Total intangible assets, gross	1,244,705	1,142,278
Total intangible assets, net	1,075,865	1,066,495
Amortizable Intangible Liabilities
Finite-lived intangible liabilities, gross	(123,835)	(93,067)
Less: accumulated amortization	12,344	3,330
Net amortizable intangible liabilities	(111,491)	(89,737)
Indefinite Lived Intangible Liabilities
Total intangible liabilities, gross	(140,546)	(109,778)
Total intangible liabilities, net	(128,202)	(106,448)
Below-market purchase options
Indefinite Lived Intangible Liabilities
Indefinite-lived intangible liabilities	(16,711)	(16,711)
Below-market rent
Amortizable Intangible Liabilities
Finite-lived intangible liabilities, gross	(116,939)	(86,171)
Less: accumulated amortization	11,832	3,227
Net amortizable intangible liabilities	(105,107)	(82,944)
Above-market ground lease
Amortizable Intangible Liabilities
Finite-lived intangible liabilities, gross	(6,896)	(6,896)
Less: accumulated amortization	512	103
Net amortizable intangible liabilities	(6,384)	(6,793)
Goodwill
Indefinite Lived Intangible Assets Including Goodwill
Indefinite-lived intangible assets	350,208	329,132
Trade name
Indefinite Lived Intangible Assets Including Goodwill
Indefinite-lived intangible assets	3,975	3,975
Management contracts
Amortizable Intangible Assets
Finite lived intangible assets, gross	32,765	32,765
Less: accumulated amortization	(32,395)	(31,283)
Amortizable intangible assets	370	1,482
Internal-use software development costs
Amortizable Intangible Assets
Finite lived intangible assets, gross	3,255	0
Less: accumulated amortization	0	0
Amortizable intangible assets	3,255	0
Contracts including internal software development costs
Amortizable Intangible Assets
Finite lived intangible assets, gross	36,020	32,765
Less: accumulated amortization	(32,395)	(31,283)
Amortizable intangible assets	3,625	1,482
In-place lease
Amortizable Intangible Assets
Finite lived intangible assets, gross	551,737	474,630
Less: accumulated amortization	(84,610)	(27,352)
Amortizable intangible assets	467,127	447,278
Tenant relationship
Amortizable Intangible Assets
Finite lived intangible assets, gross	6,247	8,149
Less: accumulated amortization	(1,656)	(3,406)
Amortizable intangible assets	4,591	4,743
Above-market rent
Amortizable Intangible Assets
Finite lived intangible assets, gross	292,132	293,627
Less: accumulated amortization	(50,157)	(13,742)
Amortizable intangible assets	241,975	279,885
Below-market ground lease
Amortizable Intangible Assets
Finite lived intangible assets, gross	4,386	0
Less: accumulated amortization	(22)	0
Amortizable intangible assets	4,364	0
Lease intangibles
Amortizable Intangible Assets
Finite lived intangible assets, gross	854,502	776,406
Less: accumulated amortization	(136,445)	(44,500)
Amortizable intangible assets	$ 718,057	$ 731,906