Segment Disclosures (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Reconciliation of reported net income to NOI and adjusted NOI
Net income	$ 251,059	$ 236,858	$ 736,961	$ 687,367
Interest income	(17,517)	(42,078)	(51,150)	(68,611)
Investment management fee income	(447)	(464)	(1,340)	(1,406)
Interest expense	111,275	108,088	324,755	325,650
Depreciation and amortization	122,975	104,783	343,496	317,172
General and administrative	24,954	45,326	75,410	90,043
Other income, net	(3,111)	(1,632)	(5,750)	(17,032)
Income taxes	55	1,034	2,840	3,553
Equity income from unconsolidated joint ventures	(10,168)	(13,892)	(39,388)	(44,278)
Total discontinued operations		(9,825)	(29,746)	(14,884)
NOI	479,075	428,198	1,356,088	1,277,574
Straight-line rents	(8,627)	(12,604)	(35,082)	(28,559)
DFL accretion	(18,760)	(19,822)	(57,995)	(65,386)
Amortization of above and below market lease intangibles, net	(276)	(346)	(619)	(6,414)
Lease termination fees	(37,981)	(205)	(38,792)	(220)
NOI adjustments related to discontinued operations		16	(11)	32
Adjusted (Cash) NOI	$ 413,431	$ 395,237	$ 1,223,589	$ 1,177,027