Segment Reporting (Tables)

3 Months Ended

Mar. 31, 2015

Segment Reporting [Abstract]

Reconciliation of Revenue from Segments to Consolidated

	Three Months Ended March 31,
	2015		2014
Revenues
Rental Operations:
Industrial	$	147,227	$	133,291
Office	25,135		38,978
Medical Office	40,028		33,310
Non-reportable Rental Operations	401		2,088
Service Operations	52,820		55,820
Total segment revenues	265,611		263,487
Other revenue	1,824		979
Consolidated revenue from continuing operations	267,435		264,466
Discontinued operations	32,115		30,072
Consolidated revenue	$	299,550	$	294,538

Summary of Net Operation Income

	Three Months Ended March 31,
	2015			2014
PNOI
Industrial	$	96,684		$	85,691
Office	14,842			15,206
Medical Office	25,232			20,805
Non-reportable Rental Operations	—			253
PNOI, excluding all sold/held for sale properties	136,758			121,955
PNOI from sold/held-for-sale properties included in continuing operations	6,239			12,423
PNOI, continuing operations	142,997			134,378
Earnings from Service Operations	5,797			8,549
Rental Operations revenues and expenses excluded from PNOI:
Straight-line rental income and expense, net	6,697			4,769
Revenues related to lease buyouts	864			2,695
Amortization of lease concessions and above and below market rents	(1,713		)	(2,211		)
Intercompany rents and other adjusting items	(731		)	(1,537		)
Non-Segment Items:
Equity in earnings of unconsolidated companies	6,246			2,321
Interest expense	(49,610		)	(49,261		)
Depreciation expense	(81,903		)	(88,298		)
Gain on sale of properties	23,484			15,853
Interest and other income, net	338			351
General and administrative expenses	(17,004		)	(14,694		)
Gain on land sales	5,425			152
Other operating expenses	(1,557		)	(2,216		)
Acquisition-related activity	(28		)	(14		)
Other non-segment revenues and expenses, net	(402		)	(692		)
Income from continuing operations before income taxes	$	38,900		$	10,145

Reportable Segments Consolidated Assets

	March 31, 2015		December 31, 2014
Assets
Rental Operations:
Industrial	$	4,672,992	$	4,677,047
Office	1,212,796		1,252,627
Medical Office	1,210,170		1,229,632
Non-reportable Rental Operations	22,909		71,741
Service Operations	155,370		158,762
Total segment assets	7,274,237		7,389,809
Non-segment assets	456,267		365,030
Consolidated assets	$	7,730,504	$	7,754,839