Investment in Unconsolidated Entities - Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
OPERATING EXPENSES:
Income from Unconsolidated Entities	$ 83,374	$ 68,221	$ 258,990	$ 203,289
Unconsolidated properties
REVENUE:
Minimum rent	454,315	447,790	1,351,429	1,325,056
Overage rent	45,064	43,669	141,591	136,191
Tenant reimbursements	222,788	203,832	645,994	597,461
Other income	55,558	55,060	169,044	170,600
Total revenue	777,725	750,351	2,308,058	2,229,308
OPERATING EXPENSES:
Property operating	139,224	135,467	401,718	398,528
Depreciation and amortization	153,420	145,351	434,620	435,615
Real estate taxes	60,853	57,767	181,790	172,818
Repairs and maintenance	17,795	15,919	56,029	53,365
Advertising and promotion	18,884	20,395	62,190	54,485
(Recovery of) Provision for credit losses	(133)	(212)	5,441	2,937
Other	44,972	38,861	133,652	122,214
Total operating expenses	435,015	413,548	1,275,440	1,239,962
Operating Income	342,710	336,803	1,032,618	989,346
Interest expense	(149,704)	(147,333)	(444,485)	(443,396)
Gain on sale or disposal of assets and interests in unconsolidated entities	40,529		101,051	35,779
Net Income	233,535	189,470	689,184	581,729
Third-Party Investors’ Share of Net Income	118,291	95,018	337,491	296,896
Our Share of Net Income	115,244	94,452	351,693	284,833
Amortization of Excess Investment	(21,901)	(22,884)	(70,671)	(71,426)
Our Share of Gain on Sale or Disposal of Assets and Interests in Unconsolidated Entities, net	(20,149)		(22,636)	(16,339)
Our Share of Gain on Sale or Disposal of Assets and Interests included in Other Income in the Consolidated Financial Statements			(36,153)
Income from Unconsolidated Entities	$ 73,194	$ 71,568	$ 222,233	$ 197,068