Discontinued Operations and Assets Held for Sale (Tables)

6 Months Ended

Jun. 30, 2012

Discontinued Operations and Disposal Groups [Abstract]

Table Illustration of Number of Properties in Discontinued Operations

	Held for Sale at June 30, 2012	Sold in 2012	Sold in 2011	Total
Office	2	7	93	102
Industrial	1	9	7	17
Retail	0	1	1	2
	3	17	101	121

Table Illustration of Discontinued Operations in Income Statement

	Three Months Ended June 30,						Six Months Ended June 30,
	2012			2011			2012			2011
Revenues	$	664		$	48,064		$	2,660		$	100,791
Operating expenses	(389		)	(22,015		)	(1,629		)	(47,641		)
Depreciation and amortization	(222		)	(16,762		)	(1,115		)	(34,037		)
Operating income (loss)	53			9,287			(84		)	19,113
Interest expense	(302		)	(13,111		)	(995		)	(27,729		)
Loss before gain on sales	(249		)	(3,824		)	(1,079		)	(8,616		)
Gain on sale of depreciable properties	3,095			2,713			9,571			14,316
Income (loss) from discontinued operations	$	2,846		$	(1,111	)	$	8,492		$	5,700

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

	Three Months Ended June 30,						Six Months Ended June 30,
	2012			2011			2012			2011
Income (loss) from continuing operations attributable to common shareholders	$	(31,280	)	$	(27,962	)	$	(73,201	)	$	12,976
Income (loss) from discontinued operations attributable to common shareholders	2,798			(1,080		)	8,329			5,551
Net income (loss) attributable to common shareholders	$	(28,482	)	$	(29,042	)	$	(64,872	)	$	18,527

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

Real estate investment, net	$	10,755
Other assets	978
Total assets held-for-sale	$	11,733
Accrued expenses	$	244
Other liabilities	135
Total liabilities held-for-sale	$	379