Real Estate (Tables)

3 Months Ended

Mar. 31, 2013

Real Estate Properties [Line Items]

Schedule of Real Estate Investments And Accumlated Depreciation [Table Text Block}

	March 31, 2013			December 31, 2012
Land	$	6,319,353		$	4,554,912
Depreciable property:
Buildings and improvements	18,222,448			14,135,740
Furniture, fixtures and equipment	1,234,836			1,343,765
In-Place lease intangibles	508,951			232,439
Projects under development:
Land	224,562			210,632
Construction-in-progress	276,267			177,118
Land held for development:
Land	527,735			294,868
Construction-in-progress	49,941			58,955
Investment in real estate	27,364,093			21,008,429
Accumulated depreciation	(4,434,775		)	(4,912,221		)
Investment in real estate, net	$	22,929,318		$	16,096,208

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]

Land	$	2,239,000
Depreciable property:
Buildings and improvements	5,833,258
Furniture, fixtures and equipment	61,470
In-Place lease intangibles	304,830
Projects under development	36,583
Land held for development	236,918
Investments in unconsolidated entities	189,244
Other assets	196,310
Other liabilities	(111,170		)
Net assets acquired	$	8,986,443

Schedule of Acquired Finite-Lived Intangible Assets by Major Class [Text Block]

Description	Balance Sheet Location	Fair Value
Assets
Ground lease intangibles – below market	Other Assets	$	178,251
Retail lease intangibles – above market	Other Assets	2,310
Lease intangible assets		180,561
Accumulated amortization		(460		)
Lease intangible assets, net		$	180,101
Liabilities
Ground lease intangibles – above market	Other Liabilities	$	2,400
Retail lease intangibles – below market	Other Liabilities	8,040
Lease intangible liabilities		10,440
Accumulated amortization		(168		)
Lease intangible liabilities, net		$	10,272

Schedule of Expected Amortization Expense [Table Text Block]

	2013			2014			2015			2016			2017			2018
Ground lease intangibles	$	3,241		$	4,321		$	4,321		$	4,321		$	4,321		$	4,321
Retail lease intangibles	(514		)	(1,230		)	(1,236		)	(1,050		)	(674		)	(205		)
Total	$	2,727		$	3,091		$	3,085		$	3,271		$	3,647		$	4,116

Business Acquisition, Pro Forma Information [Table Text Block]

	Quarter Ended March 31,
	2013			2012
	(In thousands, except per share amounts)
Total revenues	$	638,499		$	586,173
(Loss) from continuing operations (2)	(34,473		)	(149,998		)
Discontinued operations, net	1,213,615			166,364
Net income	1,179,142			16,366
Net income available to Common Shares	1,130,671			13,068
Earnings per share - basic:
Net income available to Common Shares	$	3.15		$	0.04
Weighted average Common Shares outstanding (1)	359,362			355,123
Earnings per share - diluted (2):
Net income available to Common Shares	$	3.15		$	0.04
Weighted average Common Shares outstanding (1)	359,362			355,123

Disposed Properties Table

	Properties	Apartment Units	Sales Price
Rental Properties – Consolidated	63	18,452	$	2,975,187
Total	63	18,452	$	2,975,187

Partnership Interest [Member]

Real Estate Properties [Line Items]

Business Acquisition, Pro Forma Information [Table Text Block]

	Quarter Ended March 31,
	2013			2012
	(In thousands, except per Unit amounts)
Total revenues	$	638,499		$	586,173
(Loss) from continuing operations (2)	(34,473		)	(149,998		)
Discontinued operations, net	1,213,615			166,364
Net income	1,179,142			16,366
Net income available to Units	1,178,887			13,659
Earnings per Unit - basic:
Net income available to Units	$	3.15		$	0.04
Weighted average Units outstanding (1)	373,085			368,329
Earnings per Unit - diluted (2):
Net income available to Units	$	3.15		$	0.04
Weighted average Units outstanding (1)	373,085			368,329