Segment Information (Tables)

3 Months Ended

Mar. 31, 2012

Segment Information

Property level information by geographic segment and property type, property square feet

	As of March 31, 2012				As of March 31, 2011
	CBD	Suburban	Industrial &		CBD	Suburban	Industrial &
	Office	Office	Other	Totals	Office	Office	Other	Totals
Property square feet (in thousands):
Metro Philadelphia, PA	4,591	462	—	5,053	4,592	462	—	5,054
Oahu, HI	—	—	17,876	17,876	—	—	17,914	17,914
Metro Chicago, IL	3,591	1,164	104	4,859	—	1,163	104	1,267
Metro Denver, CO	672	789	553	2,014	672	788	553	2,013
Metro Washington, DC	428	1,220	—	1,648	428	1,067	—	1,495
Other Markets	10,416	18,515	13,744	42,675	7,781	18,265	13,761	39,807
Totals	19,698	22,150	32,277	74,125	13,473	21,745	32,332	67,550

	Three Months Ended March 31, 2012								Three Months Ended March 31, 2011
	CBD		Suburban		Industrial &				CBD		Suburban		Industrial &
	Office		Office		Other		Totals		Office		Office		Other		Totals
Property rental income:
Metro Philadelphia, PA	$	29,300	$	1,104	$	—	$	30,404	$	28,273	$	1,357	$	—	$	29,630
Oahu, HI	—		—		19,895		19,895		—		—		18,596		18,596
Metro Chicago, IL	24,575		5,863		111		30,549		—		7,793		126		7,919
Metro Denver, CO	5,554		3,498		2,095		11,147		5,363		3,490		2,184		11,037
Metro Washington, DC	4,019		6,867		—		10,886		3,456		5,925		—		9,381
Other Markets	57,773		70,969		19,623		148,365		44,887		70,254		18,969		134,110
Totals	$	121,221	$	88,301	$	41,724	$	251,246	$	81,979	$	88,819	$	39,875	$	210,673
Property net operating income:
Metro Philadelphia, PA	$	15,584	$	103	$	—	$	15,687	$	14,256	$	156	$	—	$	14,412
Oahu, HI	—		—		15,514		15,514		—		—		13,421		13,421
Metro Chicago, IL	12,378		2,963		104		15,445		—		4,689		110		4,799
Metro Denver, CO	3,763		3,093		1,242		8,098		3,500		2,768		1,208		7,476
Metro Washington, DC	3,161		4,515		—		7,676		2,609		3,543		—		6,152
Other Markets	32,051		39,843		12,842		84,736		24,085		38,183		11,748		74,016
Totals	$	66,937	$	50,517	$	29,702	$	147,156	$	44,450	$	49,339	$	26,487	$	120,276

Reconciliation of NOI to net income

	Three Months Ended March 31,
	2012			2011
Rental income	$	251,246		$	210,673
Operating expenses	(104,090		)	(90,397		)
Property net operating income (NOI)	$	147,156		$	120,276
Property NOI	$	147,156		$	120,276
Depreciation and amortization	(61,351		)	(52,289		)
General and administrative	(12,310		)	(10,959		)
Acquisition related costs	(2,502		)	(2,559		)
Operating income	70,993			54,469
Interest and other income	288			708
Interest expense	(49,106		)	(47,414		)
Loss on early extinguishment of debt	(67		)	—
Equity in earnings of investees	2,958			2,712
Income from continuing operations before income tax expense	25,066			10,475
Income tax expense	(492		)	(346		)
Income from continuing operations	24,574			10,129
Income from discontinued operations	—			1,911
Net gain on sale of properties from discontinued operations	—			34,572
Net income	$	24,574		$	46,612