Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Finite-Lived Intangible Assets [Line Items]

Balances of major classes of depreciable assets and their respective estimated useful lives

Balances of major classes of depreciable assets (in thousands) and their respective estimated useful lives are:

		December 31		December 31
Asset Category	Estimated Useful Life	2012		2011
Land	Non-depreciable	$	159,039	$	116,598
Buildings and garages	40 years	1,369,493		801,619
Building improvements	7 to 40 years	65,328		53,909
Tenant improvements	Lesser of useful life or term of lease	168,706		111,934
		$	1,762,566	$	1,084,060

Computation of diluted EPS

The computation of diluted EPS is as follows:

	Year Ended December 31
	2012			2011			2010
	(in thousands, except per share data)
Numerator:
Basic and diluted net loss
attributable to common stockholders	$	(51,249	)	$	(136,955	)	$	(8,943	)
Denominator:
Basic and diluted weighted average shares	31,542			21,497			21,421
Diluted net loss per share attributable to
common stockholders	$	(1.62	)	$	(6.37	)	$	(0.42	)

Above and Below Market Leases [Member]

Finite-Lived Intangible Assets [Line Items]

Projected amortization expense for leases

As of December 31, 2012, amortization of above and below market leases is projected as a net decrease to rental income as follows for the next five years (in thousands):

	Amount
2013	$	(2,986	)
2014	(1,057		)
2015	(439		)
2016	(409		)
2017	(674		)

In Place Leases [Member]

Finite-Lived Intangible Assets [Line Items]

Projected amortization expense for leases

As of December 31, 2012, amortization expense for the value of in-place leases is projected as follows for the next five years (in thousands):

	Amount
2013	$	20,898
2014	16,201
2015	13,656
2016	11,530
2017	7,850