Discontinued Operations and Assets Held for Sale (Tables)

3 Months Ended

Mar. 31, 2012

Discontinued Operations and Disposal Groups [Abstract]

Table Illustration of Number of Properties in Discontinued Operations

	Held for Sale at March 31, 2012	Sold in 2012	Sold in 2011	Total
Office	0	7	93	100
Industrial	2	6	7	15
Retail	1	0	1	2
	3	13	101	117

Table Illustration of Discontinued Operations in Income Statement

	Three Months Ended March 31,
	2012			2011
Revenues	$	1,234		$	52,170
Operating expenses	(815		)	(25,273		)
Depreciation and amortization	(643		)	(17,159		)
Operating income (loss)	(224		)	9,738
Interest expense	(525		)	(15,141		)
Loss before gain on sales	(749		)	(5,403		)
Gain on sale of depreciable properties	6,476			11,603
Income from discontinued operations	$	5,727		$	6,200

Allocation of Common Shareholders' Income (Loss) Between Continuing and Discontinued Operations

	Three Months Ended March 31,
	2012			2011
Income (loss) from continuing operations attributable to common shareholders	$	(41,992	)	$	41,522
Income from discontinued operations attributable to common shareholders	5,602			6,047
Net income (loss) attributable to common shareholders	$	(36,390	)	$	47,569

Schedule of Discontinued Operations, Properties Held-for-Sale, Aggregate Balance Sheet Information [Table Text Block]

Real estate investment, net	$	18,159
Other assets	1,236
Total assets held-for-sale	$	19,395
Accrued expenses	$	434
Other liabilities	209
Total liabilities held-for-sale	$	643