Investment in Unconsolidated Entities (Details 8) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenue:
Minimum rent	$ 788,368	$ 740,214	$ 2,309,951	$ 2,190,983
Overage rent	47,433	52,502	123,419	123,336
Tenant reimbursements	373,223	350,595	1,077,702	1,018,316
Other income	72,545	54,987	260,736	139,918
Total revenue	1,320,137	1,234,694	3,885,482	3,573,698
Operating Expenses:
Property operating	115,820	106,742	315,418	294,318
Depreciation and amortization	289,360	281,661	873,243	849,369
Real estate taxes	114,145	97,359	327,519	291,058
Repairs and maintenance	21,189	21,416	73,599	72,838
Advertising and promotion	38,756	38,359	98,727	99,128
(Recovery of) provision for credit losses	(361)	1,769	6,172	8,635
Other	31,599	24,690	74,025	62,457
Total operating expenses	662,550	627,137	1,926,339	1,843,644
OPERATING INCOME	657,587	607,557	1,959,143	1,730,054
Interest expense	(229,654)	(249,780)	(692,801)	(758,945)
Income from Unconsolidated Entities	68,221	55,631	203,289	168,473
Equity Method Investments. | Unconsolidated properties
Revenue:
Minimum rent	447,790	436,580	1,325,056	1,289,263
Overage rent	43,669	42,760	136,191	133,146
Tenant reimbursements	203,832	202,973	597,461	588,772
Other income	55,060	54,157	170,600	228,793
Total revenue	750,351	736,470	2,229,308	2,239,974
Operating Expenses:
Property operating	135,467	141,083	398,528	434,147
Depreciation and amortization	145,351	147,946	435,615	442,141
Real estate taxes	57,767	59,934	172,818	167,523
Repairs and maintenance	15,919	16,289	53,365	51,874
Advertising and promotion	20,395	18,535	54,485	54,458
(Recovery of) provision for credit losses	(212)	210	2,937	4,288
Other	38,861	43,760	122,214	141,243
Total operating expenses	413,548	427,757	1,239,962	1,295,674
OPERATING INCOME	336,803	308,713	989,346	944,300
Interest expense	(147,333)	(147,817)	(443,396)	(449,512)
Income from Continuing Operations	189,470	160,896	545,950	494,788
Income from operations of discontinued joint venture interests				5,079
Gain on sale or disposal of assets and interests in unconsolidated entities			35,779
Net Income	189,470	160,896	581,729	499,867
Third-Party Investors' Share of Net Income	95,018	81,810	296,896	259,340
Our Share of Net Income	94,452	79,086	284,833	240,527
Amortization of Excess Investment	(22,884)	(26,187)	(71,426)	(76,168)
Our Share of Loss from Unconsolidated Discontinued Operations				(652)
Our Share of Gain on Sale or Disposal of Assets and Interests in Unconsolidated Entities, net			(16,339)
Income from Unconsolidated Entities	$ 71,568	$ 52,899	$ 197,068	$ 163,707