Basis of Presentation and Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2011

Basis Of Presentation And Significant Accounting Policies Tables [Abstract]

Non Cash Impairment And Other Losses [Table Text Block]

(Amounts in thousands)		For the Year Ended December 31,
		2011		2010		2009
Tenant buy-outs, acquisition related costs and other	$	32,259	$	6,945	$	-
Real estate assets		23,000		92,500		4,789
Development projects and undeveloped land		3,040		-		55,307
Condominium units held for sale (see page 132)		-		30,013		13,667
	$	58,299	$	129,458	$	73,763

Reconciliation Of Net Income Attributable To Common Shareholders To Estimated Taxable Income [Table Text Block]

(Amounts in thousands)			For the Year Ended December 31,
			2011		2010		2009
Net income attributable to common shareholders		$	601,771	$	596,731	$	49,093
Book to tax differences (unaudited):
	Depreciation and amortization		225,802		216,473		247,023
	Mezzanine loans receivable		(82,512)		(104,727)		171,380
	Straight-line rent adjustments		(38,800)		(70,606)		(83,959)
	Earnings of partially owned entities		(96,178)		(62,315)		(82,382)
	Stock options		(27,697)		(48,399)		(32,643)
	Sale of real estate		(18,766)		12,899		3,923
	Derivatives		(12,160)		(121,120)		-
	Other, net		(6,223)		48,915		81,936
Estimable taxable income		$	545,237	$	467,851	$	354,371