Segment Reporting (Tables)

12 Months Ended

Dec. 31, 2012

Segment Reporting [Abstract]

Summary on Revenues and Funds from Operations

The following table shows (i) the revenues for each of the reportable segments and (ii) a reconciliation of FFO attributable to common shareholders or common unitholders to net income (loss) attributable to common shareholders or common unitholders for the years ended December 31, 2012, 2011 and 2010 (in thousands):

	2012			2011			2010
Revenues
Rental Operations:
Industrial	$	438,525		$	379,030		$	280,538
Office	267,982			272,807			313,712
Medical Office	98,647			57,673			44,287
Non-reportable Rental Operations	21,794			21,829			19,912
General contractor and service fee revenue ("Service Operations")	275,071			521,796			515,361
Total Segment Revenues	1,102,019			1,253,135			1,173,810
Other Revenue	7,421			11,544			11,094
Consolidated Revenue from continuing operations	1,109,440			1,264,679			1,184,904
Discontinued Operations	8,284			194,166			248,024
Consolidated Revenue	$	1,117,724		$	1,458,845		$	1,432,928
Reconciliation of Funds From Operations
Net earnings excluding depreciation and Non-Segment Items
Industrial	$	327,175		$	278,315		$	210,202
Office	155,456			160,530			185,914
Medical Office	65,932			35,450			28,177
Non-reportable Rental Operations	15,300			15,563			13,646
Service Operations	20,201			41,316			28,496
	584,064			531,174			466,435
Non-Segment Items:
Interest expense	(245,170		)	(220,455		)	(186,407		)
Impairment charges on non-depreciable properties	—			(12,931		)	(9,834		)
Interest and other income	514			658			534
Other operating expenses	(633		)	(1,237		)	(1,231		)
General and administrative expenses	(46,424		)	(43,107		)	(41,329		)
Undeveloped land carrying costs	(8,829		)	(8,934		)	(9,203		)
Loss on debt transactions	—			—			(16,349		)
Acquisition-related activity	(4,192		)	(1,188		)	55,820
Income tax benefit	103			194			1,126
Other non-segment income	3,728			6,131			8,132
Net (income) loss attributable to noncontrolling interests - consolidated entities not wholly owned by the Partnership	(382		)	115			185
Joint venture items	37,469			38,161			40,346
Dividends on preferred shares/Preferred Units	(46,438		)	(60,353		)	(69,468		)
Adjustments for redemption/repurchase of preferred shares/Preferred Units	(5,730		)	(3,796		)	(10,438		)
Discontinued operations	1,905			57,687			77,056
FFO attributable to common unitholders of the Partnership	269,985			282,119			305,375
Net (income) loss attributable to noncontrolling interests - common limited partnership interests in the Partnership	2,273			(859		)	351
Noncontrolling interest share of FFO adjustments	(7,054		)	(6,644		)	(7,771		)
FFO attributable to common shareholders of the General Partner	265,204			274,616			297,955
Depreciation and amortization on continuing operations	(375,965		)	(326,226		)	(276,045		)
Depreciation and amortization on discontinued operations	(3,454		)	(59,453		)	(84,139		)
Company's share of joint venture adjustments	(34,702		)	(33,687		)	(34,674		)
Earnings from depreciated property sales on continuing operations	344			68,549			39,662
Earnings from depreciated property sales on discontinued operations	13,467			100,882			33,054
Earnings from depreciated property sales - share of joint venture	1,907			91			2,308
Noncontrolling interest share of FFO adjustments	7,054			6,644			7,771
Net income (loss) attributable to common shareholders of the General Partner	$	(126,145	)	$	31,416		$	(14,108	)
Add back: Net income (loss) attributable to noncontrolling interests - common limited partnership interests in the Partnership	(2,273		)	859			(351		)
Net income (loss) attributable to common unitholders of the Partnership	$	(128,418	)	$	32,275		$	(14,459	)

Reportable Segments Consolidated Assets

The assets for each of the reportable segments as of December 31, 2012 and 2011 are as follows (in thousands):

	December 31, 2012		December 31, 2011
Assets
Rental Operations:
Industrial	$	3,836,721	$	3,586,250
Office	1,683,314		1,742,196
Medical Office	1,202,929		580,177
Non-reportable Rental Operations	175,197		209,056
Service Operations	162,219		167,382
Total Segment Assets	7,060,380		6,285,061
Non-Segment Assets - Partnership	499,721		718,921
Consolidated Assets - Partnership	$	7,560,101	$	7,003,982
Non-Segment Assets - General Partner	—		455
Consolidated Assets - General Partner	$	7,560,101	$	7,004,437

Second Generation Capital Expenditures By Segment

Our second generation capital expenditures by segment are summarized as follows for the years ended December 31, 2012, 2011 and 2010 (in thousands):

	2012		2011		2010
Second Generation Capital Expenditures
Industrial	$	33,095	$	34,872	$	23,271
Office	30,092		63,933		65,203
Medical Office	641		410		183
Non-reportable Rental Operations segments	56		49		66
Total	$	63,884	$	99,264	$	88,723