Investment in Unconsolidated Entities (Details 8) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenue:
Minimum rent	$ 768,138	$ 728,486	$ 1,521,583	$ 1,450,768
Overage rent	37,029	39,160	75,986	70,834
Tenant reimbursements	364,309	342,250	704,479	667,721
Other income	139,607	37,944	188,191	84,932
Total revenue	1,349,110	1,181,982	2,565,345	2,339,004
Operating Expenses:
Property operating	99,841	92,630	199,598	187,577
Depreciation and amortization	295,778	287,214	583,883	567,708
Real estate taxes	106,487	99,396	213,374	193,699
Repairs and maintenance	22,676	21,656	52,410	51,421
Advertising and promotion	41,215	38,149	59,971	60,768
Provision for credit losses	2,685	2,442	6,533	6,866
Other	23,352	18,407	42,426	37,769
Total operating expenses	646,725	620,451	1,263,789	1,216,508
OPERATING INCOME	702,385	561,531	1,301,556	1,122,496
Interest expense	(230,974)	(254,930)	(463,147)	(509,164)
Income from Unconsolidated Entities	70,196	55,764	135,068	112,842
Equity Method Investments | Unconsolidated properties
Revenue:
Minimum rent	443,485	427,899	877,266	852,684
Overage rent	41,342	41,589	92,522	90,386
Tenant reimbursements	199,142	193,006	393,629	385,799
Other income	61,545	61,929	115,539	174,635
Total revenue	745,514	724,423	1,478,956	1,503,504
Operating Expenses:
Property operating	132,257	131,643	263,061	293,064
Depreciation and amortization	148,607	142,047	290,265	294,195
Real estate taxes	56,477	52,797	115,051	107,588
Repairs and maintenance	17,086	15,944	37,447	35,585
Advertising and promotion	17,388	17,113	34,090	35,923
Provision for credit losses	1,296	970	3,149	4,078
Other	38,924	44,554	83,351	97,483
Total operating expenses	412,035	405,068	826,414	867,916
OPERATING INCOME	333,479	319,355	652,542	635,588
Interest expense	(149,041)	(150,059)	(296,062)	(301,696)
Income from Continuing Operations	184,438	169,296	356,480	333,892
Income from operations of discontinued joint venture interests		2,094		5,079
Gain on sale or disposal of assets and interests in unconsolidated entities	35,779		35,779
Net Income	220,217	171,390	392,259	338,971
Third-Party Investors' Share of Net Income	112,763	88,217	201,877	177,530
Our Share of Net Income	107,454	83,173	190,382	161,441
Amortization of Excess Investment	(24,387)	(24,383)	(48,541)	(49,981)
Our Share of Loss from Unconsolidated Discontinued Operations		(307)		(652)
Our Share of Gain on Sale or Disposal of Assets and Interests in Unconsolidated Entities, net	(16,339)		(16,339)
Income from Unconsolidated Entities	$ 66,728	$ 58,483	$ 125,502	$ 110,808