Real Estate Investments (Tables)

9 Months Ended

Sep. 30, 2011

Real Estate Investments [Abstract]

Gross carrying value of rental properties

	September 30, 2011		December 31, 2010
Land	$	698,985	$	697,724
Building and improvements		3,748,256		3,693,579
Tenant improvements		473,487		442,808
	$	4,920,728	$	4,834,111

Business acquisition, purchase price allocation

	August 5,
	2010
Building and tenant improvements	$	98,188
Intangible assets acquired		28,856
Below market lease liabilities assumed		(683	)
Total	$	126,361

Schedule of Intangibles assets and liabilities acquired

			Weighted Average
	August 5,		Amortization Period
	2010		(in years)
Intangible assets:
In-place lease value	$	13,584		3
Tenant relationship value		8,870		5
Above market tenant leases acquired		895		1
Below market ground lease acquired		5,507		82
Total	$	28,856		23
Intangible liabilities:
Below market leases acquired	$	683		1

Supplemental pro forma operating data

	Three-months			Nine-months
	ended September 30, 2010			ended September 30, 2010
Pro forma revenues	$	142,920		$	433,734
Pro forma loss from continuing operations		(7,408	)		(19,279	)
Pro forma net loss attributable to common shareholders		(8,973	)		(17,862	)
Loss per common share from continuing operations:
Basic — as reported	$	(0.06	)	$	(0.20	)
Basic — as pro forma	$	(0.06	)	$	(0.20	)
Diulted — as reported	$	(0.06	)	$	(0.20	)
Diulted — as pro forma	$	(0.06	)	$	(0.20	)
Loss per common share:
Basic — as reported	$	(0.06	)	$	(0.14	)
Basic — as pro forma	$	(0.06	)	$	(0.14	)
Diulted — as reported	$	(0.06	)	$	(0.14	)
Diulted — as pro forma	$	(0.06	)	$	(0.14	)