Impairment Charges (Tables)

12 Months Ended

Dec. 31, 2011

Impairment Charges [Abstract]

Impairment of real estate properties

	Years Ended December 31,
	2011		2010		2009
Included in Continuing Operations:
Land	$	-	$	734,668	$	136,996
Operating properties		21,237		1,349		172,342
Other real estate		-		595		22,254
Impairment of real estate properties - continuing operations		21,237		736,612		331,592
Discontinued Operations - operating properties and land subject to ground leases		2,659		87,702		-
Total impairment charges	$	23,896	$	824,314	$	331,592

Impairment of goodwill and other assets

	Years Ended December 31,
	2011		2010		2009
Goodwill	$	-	$	368,451	$	-
Investment in and advances to unconsolidated investees		103,824		41,437		143,640
Notes receivable		22,608		2,857		-
Other assets		-		-		20,004
Total impairment of goodwill and other assets	$	126,432	$	412,745	$	163,644