Segment Reporting (Tables)

12 Months Ended

Dec. 31, 2014

Segment Reporting [Abstract]

Reconciliation of Revenue from Segments to Consolidated

for the years ended December 31, 2014, 2013 and 2012 (in thousands):

	2014		2013		2012
Revenues
Rental Operations:
Industrial	$	532,025	$	481,903	$	429,660
Office	246,694		251,269		242,719
Medical Office	146,530		127,475		82,962
Non-reportable Rental Operations	8,814		7,206		7,246
Service Operations	224,500		206,596		275,071
Total segment revenues	1,158,563		1,074,449		1,037,658
Other revenue	6,141		5,564		7,421
Consolidated revenue from continuing operations	1,164,704		1,080,013		1,045,079
Discontinued operations	3,031		47,843		72,645
Consolidated revenue	$	1,167,735	$	1,127,856	$	1,117,724

Schedule of Segment Reporting Information, by Segment [Table Text Block]

	2014			2013			2012
PNOI
Industrial	$	385,578		$	349,197		$	311,241
Office	130,284			122,412			116,850
Medical Office	91,301			71,248			40,027
Non-reportable Rental Operations	670			564			790
PNOI, excluding all sold/held for sale properties	607,833			543,421			468,908
PNOI from sold/held-for-sale properties included in continuing operations	19,435			41,336			41,479
PNOI, continuing operations	627,268			584,757			510,387
Earnings from Service Operations	24,469			22,763			20,201
Rental Operations revenues and expenses excluded from PNOI:
Straight-line rental income and expense, net	20,474			12,749			17,899
Revenues related to lease buyouts	5,246			11,151			6,926
Amortization of lease concessions and above and below market rents	(5,345		)	(8,323		)	(7,928		)
Intercompany rents and other adjusting items	(4,219		)	(4,462		)	(4,704		)
Non-Segment Items:
Equity in earnings of unconsolidated companies	94,317			54,116			4,674
Interest expense	(219,613		)	(228,324		)	(229,417		)
Depreciation expense	(384,412		)	(392,627		)	(348,268		)
Gain on sale of properties	162,715			59,179			344
Impairment charges	(49,106		)	(3,777		)	—
Interest and other income, net	1,246			1,887			514
Other operating expenses	(229		)	470			(633		)
General and administrative expenses	(49,362		)	(42,673		)	(46,424		)
Gain on land sales	10,441			9,547			—
Undeveloped land carrying costs	(6,962		)	(8,614		)	(8,829		)
Loss on extinguishment of debt	(283		)	(9,433		)	—
Acquisition-related activity	(1,099		)	(3,093		)	(4,192		)
Other non-segment revenues and expenses, net	(421		)	1,027			3,728
Income (loss) from continuing operations before income taxes	$	225,125		$	56,320		$	(85,722	)

Reportable Segments Consolidated Assets

The assets for each of the reportable segments at December 31, 2014 and 2013 were as follows (in thousands):

	December 31, 2014		December 31, 2013
Assets
Rental Operations:
Industrial	$	4,677,047	$	4,414,740
Office	1,252,627		1,524,501
Medical Office	1,229,632		1,170,420
Non-reportable Rental Operations	71,741		81,056
Service Operations	158,762		145,222
Total segment assets	7,389,809		7,335,939
Non-segment assets	365,030		416,675
Consolidated assets	$	7,754,839	$	7,752,614

Second Generation Capital Expenditures By Segment

Our second generation capital expenditures by segment are summarized as follows for the years ended December 31, 2014, 2013 and 2012 (in thousands):

	2014		2013		2012
Second Generation Capital Expenditures
Industrial	$	53,840	$	41,971	$	33,095
Office	41,124		46,600		30,092
Medical Office	3,131		3,106		641
Non-reportable Rental Operations segments	726		121		56
Total	$	98,821	$	91,798	$	63,884