Alexandria Real Estate Equities (ARE) 10-Q 7 Nov 13 2013 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2013	Oct. 31, 2013
Document and Entity Information	'	'
Entity Registrant Name	'ALEXANDRIA REAL ESTATE EQUITIES INC	'
Entity Central Index Key	'0001035443	'
Document Type	'10-Q	'
Document Period End Date	30-Sep-13	'
Amendment Flag	'false	'
Current Fiscal Year End Date	'--12-31	'
Entity Current Reporting Status	'Yes	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	71,627,655
Document Fiscal Year Focus	'2013	'
Document Fiscal Period Focus	'Q3	'

Consolidated_Balance_Sheets_Un

Consolidated Balance Sheets (Unaudited) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Assets	'	'
Investments in real estate, net	$6,613,761	$6,424,578
Cash and cash equivalents	53,839	140,971
Restricted cash	30,654	39,947
Tenant receivables	8,671	8,449
Deferred rent	182,909	170,396
Deferred leasing and financing costs, net	179,805	160,048
Investments	129,163	115,048
Other assets	159,567	90,679
Total assets	7,358,369	7,150,116
Liabilities, Noncontrolling Interests, and Equity	'	'
Secured notes payable	708,653	716,144
Unsecured senior notes payable	1,048,190	549,805
Unsecured senior line of credit	14,000	566,000
Unsecured senior bank term loans	1,100,000	1,350,000
Accounts payable, accrued expenses, and tenant security deposits	452,139	423,708
Dividends payable	54,413	41,401
Total liabilities	3,377,395	3,647,058
Commitments and contingencies	'	'
Redeemable noncontrolling interests	14,475	14,564
Alexandria Real Estate Equities, Inc.’s stockholders’ equity:	'	'
Series D cumulative convertible preferred stock	250,000	250,000
Series E cumulative redeemable preferred stock	130,000	130,000
Common stock	711	632
Additional paid-in capital	3,578,343	3,086,052
Accumulated other comprehensive loss	-40,026	-24,833
Alexandria’s stockholders’ equity	3,919,028	3,441,851
Noncontrolling interests	47,471	46,643
Total equity	3,966,499	3,488,494
Total liabilities, noncontrolling interests, and equity	$7,358,369	$7,150,116

Consolidated_Statements_of_Inc

Consolidated Statements of Income (Unaudited) (USD $)	3 Months Ended				9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Revenues:	'		'		'		'
Rental	$116,302		$106,216		$342,821		$311,746
Tenant recoveries	38,757		34,006		110,291		97,769
Other income	3,571		2,628		10,133		14,639
Total revenues	158,630		142,850		463,245		424,154
Expenses:	'		'		'		'
Rental operations	47,742		44,203		139,289		126,758
General and administrative	11,666		12,470		35,786		35,125
Interest	16,171		17,092		50,169		51,240
Depreciation and amortization	49,102		46,584		141,747		139,111
Loss on early extinguishment of debt	1,432		0		1,992		2,225
Total expenses	126,113		120,349		368,983		354,459
Income from continuing operations	32,517		22,501		94,262		69,695
(Loss) income from discontinued operations:	'		'		'		'
(Loss) income from discontinued operations before impairment of real estate	-64		5,603		993		14,961
Impairment of real estate	0		-9,799		0		-9,799
(Loss) income from discontinued operations, net	-64	[1]	-4,196	[1]	993	[1]	5,162	[1]
Gain on sale of land parcel	0		0		772		1,864
Net income	32,453		18,305		96,027		76,721
Net income attributable to noncontrolling interests	960		828		2,922		2,390
Dividends on preferred stock	6,472		6,471		19,414		20,857
Preferred stock redemption charge	0		0		0		5,978
Net income attributable to unvested restricted stock awards	442		360		1,187		866
Net income attributable to Alexandria’s common stockholders	$24,579		$10,646		$72,504		$46,630
Earnings per share attributable to Alexandria’s common stockholders – basic and diluted:	'		'		'		'
Continuing operations	$0.35		$0.24		$1.07		$0.67
Discontinued operations, net	$0		($0.07)		$0.01		$0.08
Earnings per share – basic and diluted	$0.35		$0.17		$1.08		$0.75
[1]	(Loss) income from discontinued operations, net, includes the results of operations for two operating properties that were classified as “held for sale” as of September 30, 2013, as well as the results of operations (prior to disposition) and (gain) loss on sale of real estate attributable to 10 properties sold during the period from January 1, 2012, to September 30, 2013.

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (Unaudited) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement of Other Comprehensive Income [Abstract]	'	'	'	'
Net income	$32,453	$18,305	$96,027	$76,721
Unrealized gains (losses) on marketable securities:	'	'	'	'
Unrealized holding (losses) gains arising during the period	-37	796	323	1,363
Reclassification adjustment for gains included in net income	-250	-1,421	-480	-2,107
Unrealized gains (losses) on marketable securities, net	-287	-625	-157	-744
Unrealized gains (losses) on interest rate swaps:	'	'	'	'
Unrealized interest rate swap losses arising during the period	-676	-2,818	-704	-9,982
Reclassification adjustment for amortization of interest expense included in net income	3,904	5,956	12,046	17,626
Unrealized gains (losses) on interest rate swaps, net	3,228	3,138	11,342	7,644
Foreign currency translation (losses) gains	-3,404	15,104	-26,461	7,871
Total other comprehensive (loss) income	-463	17,617	-15,276	14,771
Comprehensive income	31,990	35,922	80,751	91,492
Less: comprehensive income attributable to noncontrolling interests	-933	-805	-2,839	-2,379
Comprehensive income attributable to Alexandria’s common stockholders	$31,057	$35,117	$77,912	$89,113

Consolidated_Statement_of_Chan

Consolidated Statement of Changes in Stockholders' Equity and Noncontrolling Interests (Unaudited) (USD $)	Total	Series D Cumulative Convertible Preferred Stock	Series E Cumulative Redeemable Preferred Stock	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Noncontrolling Interests	Redeemable Noncontrolling Interests
In Thousands, except Share data, unless otherwise specified
Beginning balance at Dec. 31, 2012	$3,488,494	$250,000	$130,000	$632	$3,086,052	$0	($24,833)	$46,643	$14,564
Beginning balance (in shares) at Dec. 31, 2012	'	'	'	63,244,645	'	'	'	'	'
Increase (Decrease) in Stockholders' Equity	'	'	'	'	'	'	'	'	'
Net income	95,223	'	'	'	'	93,105	'	2,118	804
Total other comprehensive income (loss)	-15,276	'	'	'	'	'	-15,193	-83	0
Distributions to noncontrolling interests	-1,207	'	'	'	'	'	'	-1,207	-893
Issuance of common stock (in shares)	'	'	'	7,590,000	'	'	'	'	'
Issuance of common stock	534,677	'	'	76	534,601	'	'	'	'
Issuances pursuant to stock plan (in shares)	'	'	'	246,283	'	'	'	'	'
Issuances pursuant to stock plan	17,390	'	'	3	17,387	'	'	'	'
Dividends declared on common stock	-133,388	'	'	'	'	-133,388	'	'	'
Dividends declared on preferred stock	-19,414	'	'	'	'	-19,414	'	'	'
Distributions in excess of earnings	'	'	'	'	-59,697	59,697	'	'	'
Ending balance at Sep. 30, 2013	$3,966,499	$250,000	$130,000	$711	$3,578,343	$0	($40,026)	$47,471	$14,475
Ending balance (in shares) at Sep. 30, 2013	'	'	'	71,080,928	'	'	'	'	'

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (Unaudited) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Operating Activities	'	'
Net income	$96,027	$76,721
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Depreciation and amortization	142,677	143,933
Loss on early extinguishment of debt	1,992	2,225
Gain on sale of land parcel	-772	-1,864
Loss (gain) on sale of real estate	121	-1,564
Non-cash impairment of real estate	0	9,799
Amortization of loan fees and costs	7,300	7,327
Amortization of debt premiums/discounts	383	401
Amortization of acquired above and below market leases	-2,490	-2,356
Deferred rent	-20,007	-19,216
Stock compensation expense	11,541	10,412
Equity in loss related to investments	0	26
Gain on sales of investments	-4,716	-12,316
Loss on sales of investments	529	1,607
Changes in operating assets and liabilities:	'	'
Restricted cash	1,243	441
Tenant receivables	-271	-2,637
Deferred leasing costs	-37,190	-23,597
Other assets	-11,428	-3,230
Accounts payable, accrued expenses, and tenant security deposits	51,437	41,378
Net cash provided by operating activities	236,376	227,490
Investing Activities	'	'
Proceeds from sale of properties	101,815	36,179
Additions to properties	-450,140	-406,066
Purchase of properties	-24,537	-42,171
Change in restricted cash related to construction projects	5,711	-11,453
Distribution from unconsolidated real estate entity	0	22,250
Contributions to unconsolidated real estate entity	-13,881	-5,042
Additions to investments	-22,835	-21,997
Proceeds from investments	12,750	19,905
Net cash used in investing activities	-391,117	-408,395
Financing Activities	'	'
Borrowings from secured notes payable	26,319	2,874
Repayments of borrowings from secured notes payable	-34,120	-8,125
Proceeds from issuance of unsecured senior notes payable	498,561	549,533
Principal borrowings from unsecured senior line of credit and unsecured senior bank term loans	319,000	623,147
Repayments of borrowings from unsecured senior line of credit	-871,000	-580,147
Repayment of unsecured senior bank term loan	-250,000	-250,000
Repurchase of unsecured senior convertible notes	-384	-84,801
Redemption of Series C Cumulative Redeemable Preferred Stock	0	-129,638
Proceeds from issuance of Series E Cumulative Redeemable Preferred Stock	0	124,868
Change in restricted cash related to financings	923	-10,476
Deferred financing costs paid	-16,247	-25,301
Proceeds from common stock offering	535,686	98,443
Proceeds from exercise of stock options	0	155
Dividends paid on common stock	-120,367	-92,743
Dividends paid on preferred stock	-19,414	-21,348
Distributions to redeemable noncontrolling interests	0	-943
Redemption of redeemable noncontrolling interests	0	-150
Contributions by noncontrolling interests	0	1,626
Distributions to noncontrolling interests	-2,100	-770
Net cash provided by financing activities	66,857	196,204
Effect of foreign exchange rate changes on cash and cash equivalents	752	1,066
Net increase (decrease) in cash and cash equivalents	-87,132	16,365
Cash and cash equivalents at beginning of period	140,971	78,539
Cash and cash equivalents at end of period	53,839	94,904
Supplemental Disclosure of Cash Flow Information	'	'
Cash paid during the period for interest, net of interest capitalized	34,281	30,485
Non-Cash Investing Activities	'	'
Note receivable from sale of real estate	$38,820	$6,125

Background_Notes

Background (Notes)	9 Months Ended
	Sep. 30, 2013
Background	'
Background	'
	Background
	As used in this quarterly report on Form 10-Q, references to the “Company,” “Alexandria,” “we,” “our,” and “us” refer to Alexandria Real Estate Equities, Inc. and its subsidiaries.
	Alexandria Real Estate Equities, Inc. (NYSE: ARE), a self-administered and self-managed investment-grade real estate investment trust (“REIT”), is the largest and leading REIT focused principally on owning, operating, developing, redeveloping, and acquiring high-quality, sustainable real estate for the broad and diverse life science industry.  Alexandria’s client tenants span the life science industry, including renowned academic and medical institutions, multinational pharmaceutical companies, public and private biotechnology entities, United States (“U.S.”) government research agencies, medical device companies, industrial biotech companies, venture capital firms, and life science product and service companies.  For additional information on Alexandria Real Estate Equities, Inc., please visit www.are.com.

Basis_of_presentation_Notes

Basis of presentation (Notes)	9 Months Ended
	Sep. 30, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Basis of presentation	'
	Basis of presentation
	We have prepared the accompanying interim consolidated financial statements in accordance with U.S. generally accepted accounting principles (“GAAP”) and in conformity with the rules and regulations of the Securities and Exchange Commission (“SEC”).  In our opinion, the interim consolidated financial statements presented herein reflect all adjustments that are necessary to fairly present the interim consolidated financial statements.  The results of operations for the interim period are not necessarily indicative of the results that may be expected for the year ending December 31, 2013.  These consolidated financial statements should be read in conjunction with the consolidated financial statements and the notes thereto included in our annual report on Form 10-K for the year ended December 31, 2012.
	The accompanying consolidated financial statements include the accounts of Alexandria Real Estate Equities, Inc. and its subsidiaries.  All significant intercompany balances and transactions have been eliminated.
	We hold interests, together with certain third parties, in companies that we consolidate in our financial statements.  We consolidate the companies because we exercise significant control over major decisions by these entities, such as investment activity and changes in financing.
	Use of estimates
	The preparation of consolidated financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the reported amounts of assets, liabilities, and equity; the disclosure of contingent assets and liabilities as of the date of the consolidated financial statements; and the amounts of revenues and expenses during the reporting period.  Actual results could materially differ from those estimates.
	Reclassifications
	Certain prior period amounts have been reclassified to conform to the current period presentation.
	Investments in real estate, net, and discontinued operations
	We recognize assets acquired (including the intangible value of above or below market leases, acquired in-place leases, client tenant relationships, and other intangible assets or liabilities), liabilities assumed, and any noncontrolling interest in an acquired entity at their fair value as of the acquisition date.  If there is a bargain fixed rate renewal option for the period beyond the non-cancelable lease term, we evaluate factors such as the business conditions in the industry in which the lessee operates, the economic conditions in the area in which the property is located, and the ability of the lessee to sublease the property during the renewal term, in order to determine the likelihood that the lessee will renew.  When we determine there is reasonable assurance that such bargain purchase option will be exercised, we consider its impact in determining the intangible value of such lease and its related amortization period.  The value of tangible assets acquired is based upon our estimation of value on an “as if vacant” basis.  The value of acquired in-place leases includes the estimated carrying costs during the hypothetical lease-up period and other costs that would have been incurred in the execution of similar leases, considering market conditions at the acquisition date of the acquired in-place lease.  We assess the fair value of tangible and intangible assets based on numerous factors, including estimated cash flow projections that utilize appropriate discount and capitalization rates and available market information.  Estimates of future cash flows are based on a number of factors, including the historical operating results, known trends, and market/economic conditions that may affect the property.  We also recognize the fair values of assets acquired, the liabilities assumed, and any noncontrolling interest in acquisitions of less than a 100% interest when the acquisition constitutes a change in control of the acquired entity.  Acquisition-related costs and restructuring costs are expensed as incurred.
	The values allocated to land improvements, tenant improvements, equipment, buildings, and building improvements are depreciated on a straight-line basis using an estimated life of 20 years for land improvements, the respective lease term for tenant improvements, the estimated useful life for equipment, and the shorter of the term of the respective ground lease and up to 40 years for buildings and building improvements.  The values of acquired above and below market leases are amortized over the lives of the related leases and recognized as either an increase (for below market leases) or a decrease (for above market leases) to rental income.  The values of acquired in-place leases are classified in other assets in the accompanying consolidated balance sheets, and amortized over the remaining terms of the related leases.
	We are required to capitalize project costs, including predevelopment costs, interest, property taxes, insurance, and other costs directly related and essential to the acquisition, development, redevelopment, or construction of a project.  Capitalization of development, redevelopment, and construction costs is required while activities are ongoing to prepare an asset for its intended use.  Fluctuations in our development, redevelopment, and construction activities could result in significant changes to total expenses and net income.  Costs incurred after a project is substantially complete and ready for its intended use are expensed as incurred.  Should development, redevelopment, or construction activity cease, interest, property taxes, insurance, and certain other costs would no longer be eligible for capitalization and would be expensed as incurred.  Expenditures for repairs and maintenance are expensed as incurred.
	A property is classified as “held for sale” when all of the following criteria for a plan of sale have been met: (1) management, having the authority to approve the action, commits to a plan to sell the property; (2) the property is available for immediate sale in its present condition, subject only to terms that are usual and customary; (3) an active program to locate a buyer and other actions required to complete the plan to sell have been initiated; (4) the sale of the property is probable and is expected to be completed within one year; (5) the property is being actively marketed for sale at a price that is reasonable in relation to its current fair value; and (6) actions necessary to complete the plan of sale indicate that it is unlikely that significant changes to the plan will be made or that the plan will be withdrawn.  When all of these criteria have been met, the property is classified as “held for sale.” If (1) the operations and cash flows of the property have been or will be eliminated from the ongoing operations; and (2) we will not have any significant continuing involvement in the operations of the property after the sale, then its operations, including any interest expense directly attributable to it, are classified as discontinued operations in our consolidated statements of income, and amounts for all prior periods presented are reclassified from continuing operations to discontinued operations.  Depreciation of assets ceases upon designation of a property as “held for sale.”
	Impairment of long-lived assets
	Long-lived assets to be held and used, including our rental properties, land held for future development, construction in progress, and intangibles, are individually evaluated for impairment when conditions exist that may indicate that the carrying amount of a long-lived asset may not be recoverable.  The carrying amount of a long-lived asset to be held and used is not recoverable if it exceeds the sum of the undiscounted cash flows expected to result from the use and eventual disposition of the asset.  Impairment indicators or triggering events for long-lived assets to be held and used, including our rental properties, land held for future development, and construction in progress, are assessed by project and include significant fluctuations in estimated net operating income, occupancy changes, significant near-term lease expirations, current and historical operating and/or cash flow losses, construction costs, estimated completion dates, rental rates, and other market factors.  We assess the expected undiscounted cash flows based upon numerous factors, including, but not limited to, construction costs, available market information, current and historical operating results, known trends, current market/economic conditions that may affect the property, and our assumptions about the use of the asset, including, if necessary, a probability-weighted approach if multiple outcomes are under consideration.  Upon determination that an impairment has occurred, a write-down is recognized to reduce the carrying amount to its estimated fair value.  If an impairment loss is not required to be recognized, the recognition of depreciation is adjusted prospectively, as necessary, to reduce the carrying amount of the real estate to its estimated disposition value over the remaining period that the real estate is expected to be held and used.  We may adjust depreciation of properties that are expected to be disposed of or redeveloped prior to the end of their useful lives.
	We use a “held for sale” impairment model for our properties classified as “held for sale.”  The “held for sale” impairment model is different from the held and used impairment model.  Under the “held for sale” impairment model, an impairment loss is recognized if the carrying amount of the long-lived asset classified as “held for sale” exceeds its fair value less cost to sell.  Because of these two different models, it is possible for a long-lived asset previously classified as held and used to require the recognition of an impairment charge upon classification as “held for sale.”
	Investments
	We hold equity investments in certain publicly traded companies and privately held entities primarily involved in the life science industry.  All of our investments in actively traded public companies are considered “available for sale” and are reflected in the accompanying consolidated balance sheets at fair value.  Fair value has been determined based upon the closing price as of each balance sheet date, with unrealized gains and losses shown as a separate component of comprehensive income.  The classification of each investment is determined at the time each investment is made, and such determination is reevaluated at each balance sheet date.  The cost of each investment sold is determined by the specific identification method, with net realized gains or losses classified in other income in the accompanying consolidated statements of income.  Investments in privately held entities are generally accounted for under the cost method when our interest in the entity is so minor that we have virtually no influence over the entity’s operating and financial policies.  Certain investments in privately held entities are accounted for under the equity method when our interest in the entity is not deemed so minor that we have virtually no influence over the entity’s operating and financial policies.  Under the equity method of accounting, we recognize our investment initially at cost and adjust the carrying amount of the investment to recognize our share of the earnings or losses of the investee subsequent to the date of our investment.  Additionally, we limit our ownership percentage in the voting stock of each individual entity to less than 10%.  As of September 30, 2013, and December 31, 2012, our ownership percentage in the voting stock of each individual entity was less than 10%.
	Individual investments are evaluated for impairment when changes in conditions may indicate an impairment exists.  The factors that we consider in making these assessments include market prices, market conditions, available financing, prospects for favorable or unfavorable clinical trial results, new product initiatives, and new collaborative agreements.  If there are no identified events or changes in circumstances that would have an adverse effect on our cost method investments, we do not estimate the investment’s fair value.  For all of our investments, if a decline in the fair value of an investment below the carrying value is determined to be other than temporary, such investment is written down to its estimated fair value with a non-cash charge to current earnings.
	Income taxes
	We are organized and qualify as a REIT pursuant to the Internal Revenue Code of 1986, as amended (the “Code”).  Under the Code, a REIT that distributes 100% of its REIT taxable income as a dividend to its shareholders each year and that meets certain other conditions is not subject to federal income taxes, but could be subject to certain state and local taxes.  We have distributed 100% or more of our taxable income.  Therefore, no provision for federal income taxes is required.  We file tax returns, including returns for our subsidiaries, with federal, state, and local jurisdictions, including jurisdictions located in the U.S., Canada, India, China, and other international locations.  Our tax returns are subject to examination in various jurisdictions for the calendar years 2008 through 2012.
	We recognize tax benefits of uncertain tax positions only if it is more likely than not that the tax position will be sustained, based solely on its technical merits, with the taxing authority having full knowledge of all relevant information.  The measurement of a tax benefit for an uncertain tax position that meets the “more likely than not” threshold is based on a cumulative probability model under which the largest amount of tax benefit recognized is the amount with a greater than 50% likelihood of being realized upon ultimate settlement with the taxing authority having full knowledge of all the relevant information.  As of September 30, 2013, there were no unrecognized tax benefits.  We do not anticipate a significant change to the total amount of unrecognized tax benefits within the next 12 months.
	Interest expense and penalties, if any, would be recognized in the first period during which the interest or penalty would begin accruing, according to the provisions of the relevant tax law at the applicable statutory rate of interest.  We did not incur tax related interest expense or penalties for the three and nine months ended September 30, 2013.
	Interest income
	Interest income was approximately $1.2 million and $1.0 million during the three months ended September 30, 2013 and 2012, respectively.  Interest income was approximately $3.5 million and $2.5 million during the nine months ended September 30, 2013 and 2012, respectively. Interest income is classified in other income in the accompanying consolidated statements of income.
	Recognition of rental income and tenant recoveries
	Rental income from leases is recognized on a straight-line basis over the respective lease terms.  We classify amounts currently recognized as income, and expected to be received in later years, as an asset in deferred rent in the accompanying consolidated balance sheets.  Amounts received currently, but recognized as income in future years, are classified in accounts payable, accrued expenses, and tenant security deposits in the accompanying consolidated balance sheets.  We commence recognition of rental income at the date the property is ready for its intended use and the client tenant takes possession of or controls the physical use of the property.
	Tenant recoveries related to reimbursement of real estate taxes, insurance, utilities, repairs and maintenance, and other operating expenses are recognized as revenue in the period during which the applicable expenses are incurred.
	Tenant receivables consist primarily of amounts due for contractual lease payments, reimbursements of common area maintenance expenses, property taxes, and other expenses recoverable from client tenants.  Tenant receivables are expected to be collected within one year.  We maintain an allowance for estimated losses that may result from the inability of our client tenants to make payments required under the terms of the lease and for tenant recoveries due.  If a client tenant fails to make contractual payments beyond any allowance, we may recognize additional bad debt expense in future periods equal to the amount of uncollectible rent and deferred rent receivables arising from the straight-lining of rent.  As of September 30, 2013, and December 31, 2012, we had no allowance for estimated losses.
	As of September 30, 2013, approximately 94% of our leases (on a rentable square footage basis) were triple net leases, requiring client tenants to pay substantially all real estate taxes, insurance, utilities, common area expenses, and other operating expenses (including increases thereto) in addition to base rent.  Approximately 95% of our leases (on a rentable square footage basis) contained effective annual rent escalations that were either fixed or based on a consumer price index or another index.  Additionally, approximately 92% of our leases (on a rentable square footage basis) provided for the recapture of certain capital expenditures.

Investments_in_real_estate_Not

Investments in real estate (Notes)	9 Months Ended
	Sep. 30, 2013
Real Estate [Abstract]	'
Investments in real estate	'
	Investments in real estate
	Our investments in real estate, net, consisted of the following as of September 30, 2013, and December 31, 2012 (in thousands):
		30-Sep-13				31-Dec-12
	Rental properties:
	Land (related to rental properties)	$	542,511			$	522,664
	Buildings and building improvements	5,315,447				4,933,314
	Other improvements	170,078				189,793
	Rental properties	6,028,036				5,645,771
	Less: accumulated depreciation	(915,494		)		(875,035		)
	Rental properties, net	5,112,542				4,770,736
	Construction in progress (“CIP”)/current value-creation projects:
	Active development in North America	594,973				431,578
	Investment in unconsolidated joint venture	42,537			(1)	28,656
	Active redevelopment in North America	24,960				199,744
	Active development and redevelopment in Asia	97,319				101,602
	Generic infrastructure/building improvement projects in North America	46,227				80,599
		806,016				842,179
	Subtotal	5,918,558				5,612,915
	Land/future value-creation projects:
	Land undergoing predevelopment activities (CIP) in North America	351,062				433,310
	Land held for future development in North America	190,427				296,039
	Land held for future development/undergoing predevelopment activities (CIP) in Asia	77,274				82,314
	Land subject to sale negotiations	76,440				—
		695,203				811,663
	Investments in real estate, net	$	6,613,761			$	6,424,578
	-1	The book value for this unconsolidated joint venture represents our equity investment in the project.
	Investment in unconsolidated real estate entity
	We have a 27.5% interest in an unconsolidated joint venture that is currently developing a building totaling 413,536 RSF in the Longwood Medical Area of the Greater Boston market. The project is 37% pre-leased to Dana-Farber Cancer Institute, Inc. Our total investment into this project is approximately$42.5 million as of September 30, 2013. The total project costs are being funded primarily from a $213.2 million non-recourse secured construction loan, of which $75.0 million was drawn and outstanding at September 30, 2013. The loan bears interest at a rate of LIBOR+3.75%, with a floor of 5.25%. This loan has a maturity date of April 1, 2019, assuming the joint venture exercises its two separate one-year options to extend the stated maturity date of April 1, 2017.
	We do not qualify as the primary beneficiary of the unconsolidated joint venture since we do not have the power to direct the activities of the entity that most significantly impacts its economic performance. The decisions that most significantly impact the entity’s economic performance require both our consent and that of our partners, including all major operating, investing, and financing decisions, as well as decisions involving major expenditures. Consequently, we do not consolidate this joint venture and we account for our investment under the equity method of accounting.
	Land undergoing predevelopment activities (additional CIP)
	Land undergoing predevelopment activities is classified as construction in progress and is undergoing activities prior to commencement of vertical construction of above-ground building improvements.  We generally will not commence ground-up development of any parcels undergoing predevelopment activities without first securing pre-leasing for such space, except when there is significant market demand for high-quality laboratory facilities.  If vertical aboveground construction is not initiated at completion of predevelopment activities, the land parcel will be classified as land held for future development.  Our objective with predevelopment is to reduce the time it takes to deliver projects to prospective client tenants.  Additionally, during predevelopment, we focus on the design of cost effective buildings with generic laboratory and office infrastructure to accommodate single and multi-tenancy. The largest project included in land undergoing predevelopment consists of our 1.2 million developable square feet at the Alexandria Center™ at Kendall Square in East Cambridge, Massachusetts.
	We are required to capitalize project costs, including interest, property taxes, insurance, and other costs directly related and essential to the development or construction of a project during periods when activities necessary to prepare an asset for its intended use are in progress.  Predevelopment costs generally include the following activities prior to commencement of vertical construction:
	Ÿ	Traditional preconstruction costs including entitlement, design, construction drawings, Building Information Modeling (3-D virtual modeling), budgeting, sustainability and energy optimization reviews, permitting, and planning for all aspects of the project.
	Ÿ	Site and infrastructure construction costs including belowground site work, utility connections, land grading, drainage, egress and regress access points, foundation, and other costs to prepare the site for vertical construction of aboveground building improvements. For example, site and infrastructure costs for the 1.2 million RSF primarily related to 50 Binney Street and 100 Binney Street of the Alexandria Center™ at Kendall Square are classified as predevelopment prior to commencement of vertical construction.
	Land held for future development
	Land held for future development represents real estate we plan to develop in the future, but on which, as of each period presented, no construction or predevelopment activities were ongoing. In such cases, all predevelopment efforts have been advanced to appropriate stages and no further predevelopment activities are ongoing; therefore, interest, property taxes, insurance, and other costs are expensed as incurred.
	Real estate asset sales
	During the nine months ended September 30, 2013, we sold seven properties for aggregate consideration of $128.6 million, including four properties sold at a total gain of $271 thousand and three properties sold at a total loss of $392 thousand. The net loss on sales is classified in (loss) income from discontinued operations before impairment of real estate in the accompanying consolidated statements of income.
	During the nine months ended September 30, 2013, we sold three parcels of land for aggregate consideration of $18.1 million and recognized gains of $772 thousand, which included a gain of $381 thousand on the sale of two parcels in the San Francisco Bay Area market, and a gain of $391 thousand on the sale of one parcel in the Greater NYC market. These gains are classified in gains on sales of land parcels in the accompanying consolidated statements of income.

Investments_Notes

Investments (Notes)	9 Months Ended
	Sep. 30, 2013
Investments [Abstract]	'
Investments	'
	Investments
	We hold equity investments in certain publicly traded companies and privately held entities primarily involved in the life science industry.  Investments in “available for sale” securities with gross unrealized losses as of September 30, 2013, have each been in a continuous unrealized loss position for less than 12 months.  We have the ability and intent to hold these investments for a reasonable period of time sufficient for the recovery of our investment.  We believe that these unrealized losses are temporary, and accordingly we have not recognized impairment charges related to “available for sale” securities as of September 30, 2013.  As of September 30, 2013, and December 31, 2012, there were no unrealized losses in our investments in privately held entities accounted for under the cost method.
	The following table summarizes our investments as of September 30, 2013, and December 31, 2012 (in thousands):
		30-Sep-13			31-Dec-12
	“Available-for-sale” securities, cost basis	$	1,940		$	1,236
	Gross unrealized gains	1,708			1,561
	Gross unrealized losses	(392		)	(88		)
	“Available-for-sale” securities, at fair value	3,256			2,709
	Investments accounted for under cost method	125,901			112,333
	Investments accounted for under equity method	6			6
	Total investments	$	129,163		$	115,048
	The following table outlines our investment income, which is classified in other income in the accompanying consolidated statements of income for the three and nine months ended September 30, 2013 (in thousands):
		Three Months Ended September 30,						Nine Months Ended
								September 30,
		2013			2012			2013			2012
	Gross realized gains	$	2,050		$	1,190		$	4,716		$	12,316
	Gross realized losses	—			(518		)	(529		)	(1,607		)
	Equity in loss related to equity method investments	—			—			—			(26		)
	Investment income	$	2,050		$	672		$	4,187		$	10,683
	Amount of gains reclassified from accumulated other comprehensive income to realized gains, net	$	250		$	1,421		$	480		$	2,107

Secured_and_unsecured_senior_d

Secured and unsecured senior debt (Notes)	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]	'
Secured and unsecured senior debt	'
	Secured and unsecured senior debt
	The following table summarizes our secured and unsecured senior debts and their respective principal maturities, as of September 30, 2013 (dollars in thousands):
		Fixed Rate/Hedged				Unhedged				Total				Percentage of Total			Weighted Average			Weighted Average
		Variable Rate				Variable Rate				Consolidated							Interest Rate at			Remaining Term
																	End of Period (1)			(in years)
	Secured notes payable, net	$	589,126			$	119,527			$	708,653			24.7	%		5.47	%		2.5
	Unsecured senior notes payable, net	1,048,190				—				1,048,190				36.5			4.29			9.1
	$1.5 billion unsecured senior line of credit	—				14,000				14,000				0.5			1.28			5.3
	2016 Unsecured Senior Bank Term Loan	350,000				150,000				500,000				17.4			1.7			2.8
	2019 Unsecured Senior Bank Term Loan	600,000				—				600,000				20.9			3.3			5.3
	Total debt / weighted average	$	2,587,316			$	283,527			$	2,870,843			100	%		3.91	%		5.5
	Percentage of total debt	90		%		10		%		100		%
	-1	Represents the weighted average contractual interest rate as of the end of the period plus the impact of debt premiums/discounts and our interest rate swap agreements. The weighted average interest rate excludes bank fees and amortization of loan fees.
	The following table summarizes our outstanding consolidated indebtedness as of September 30, 2013 (dollars in thousands):
			Stated			Weighted Average				Maturity Date(2)		Remaining for the Period Ending December 31,
	Debt		Rate			Interest Rate(1)						2013				2014				2015			2016			2017			Thereafter			Total
	Secured notes payable
	Greater Boston		5.26	%		5.59		%		4/1/14		$	979			$	208,683			$	—		$	—		$	—		$	—		$	209,662
	Suburban Washington, D.C.		2.17			2.17				4/20/14	(3)	—				76,000				—			—			—			—			76,000
	San Diego		6.05			4.88				7/1/14		24				6,458				—			—			—			—			6,482
	San Diego		5.39			4				11/1/14		30				7,495				—			—			—			—			7,525
	Seattle		6			6				11/18/14		60				240				—			—			—			—			300
	Suburban Washington, D.C.		5.64			4.5				6/1/15		22				138				5,788			—			—			—			5,948
	Greater Boston, San Diego, and Greater New York City		5.73			5.73				1/1/16		416				1,713				1,816			75,501			—			—			79,446
	Greater Boston, San Diego, and Greater NYC		5.82			5.82				4/1/16		221				931				988			29,389			—			—			31,529
	San Francisco Bay Area		6.35			6.35				8/1/16		580				2,487				2,652			126,715			—			—			132,434
	San Francisco Bay Area		L+1.50			1.69				7/1/15	(4)	—				—				43,227			—			—			—			43,227
	San Francisco Bay Area		L+1.40			1.59				6/1/16	(5)	—				—				—			—			—			—			—
	Greater Boston		L+1.35			1.54				8/23/17	(6)	—				—				—			—			—			—			—
	San Diego, Suburban Washington, D.C., and Seattle		7.75			7.75				4/1/20		345				1,453				1,570			1,696			1,832			108,469			115,365
	San Francisco Bay Area		6.5			6.5				6/1/37		—				17				18			19			20			773			847
	Average/Total		5.41	%		5.47						2,677				305,615				56,059			233,320			1,852			109,242			708,765
	$1.5 billion unsecured senior line of credit		L+1.10	%	(7)	1.28				1/3/19		—				—				—			—			—			14,000			14,000
	2016 Unsecured Senior Bank Term Loan		L+1.20	%		1.7				7/31/16		—				—				—			500,000			—			—			500,000
	2019 Unsecured Senior Bank Term Loan		L+1.20	%		3.3				1/3/19		—				—				—			—			—			600,000			600,000
	Unsecured senior notes payable		4.6	%		4.61				4/1/22		—				—				—			—			—			550,000			550,000
	Unsecured senior notes payable		3.9	%		3.94				6/15/23		—				—				—			—			—			500,000			500,000
	Average/Subtotal					3.91						2,677				305,615				56,059			733,320			1,852			1,773,242			2,872,765
	Unamortized discounts					—						(146		)		(199		)		(139		)	(177		)	(184		)	(1,077		)	(1,922		)
	Average/Total					3.91		%				$	2,531			$	305,416			$	55,920		$	733,143		$	1,668		$	1,772,165		$	2,870,843
	Balloon payments											$	—			$	297,080			$	48,955		$	730,029		$	—		$	1,768,352		$	2,844,416
	Principal amortization											2,531				8,336				6,965			3,114			1,668			3,813			26,427
	Total consolidated debt											$	2,531			$	305,416			$	55,920		$	733,143		$	1,668		$	1,772,165		$	2,870,843
	Fixed rate/hedged variable rate debt											$	2,471			$	229,176			$	12,693		$	583,143		$	1,668		$	1,758,165		$	2,587,316
	Unhedged variable rate debt											60				76,240				43,227			150,000			—			14,000			283,527
	Total consolidated debt											$	2,531			$	305,416			$	55,920		$	733,143		$	1,668		$	1,772,165		$	2,870,843
	-1	Represents the weighted average contractual interest rate as of the end of the period plus the impact of debt premiums/discounts and our interest rate swap agreements. The weighted average interest rate excludes bank fees and amortization of loan fees.
	-2	Includes any extension options that we control.
	-3	We are having discussions with the lender on an extension of the maturity date.
	-4	Secured construction loan with aggregate commitments of $55.0 million. We have two, one-year options to extend the stated maturity date to July 1, 2017, subject to certain conditions.
	-5	Secured construction loan with aggregate commitments of $33.0 million. We have two, one-year options to extend the stated maturity date to June 1, 2018, subject to certain conditions. As of September 30, 2013, we had not drawn on the loan.
	-6	Secured construction loan with aggregate commitments of $245.4 million. We have a one-year option to extend the stated maturity date to August 23, 2018, subject to certain conditions. As of September 30, 2013, we had not drawn on the loan.
	-7	In addition to the stated rate, the line of credit is subject to an annual facility fee of 0.20%.
	3.90% Unsecured senior notes payable
	In June 2013, we completed a $500.0 million public offering of our unsecured senior notes payable at a stated interest rate of 3.90% (“3.90% Unsecured Senior Notes”).  The unsecured senior notes payable were priced at 99.712% of the principal amount with a yield to maturity of 3.94% and are due June 15, 2023.  The unsecured senior notes payable are unsecured obligations of the Company and are fully and unconditionally guaranteed by Alexandria Real Estate Equities, L.P., a 100% owned subsidiary of the Company.  The unsecured senior notes payable rank equally in right of payment with all other senior unsecured indebtedness.  However, the unsecured senior notes payable are effectively subordinated to existing and future mortgages and other secured indebtedness (to the extent of the value of the collateral securing such indebtedness) and to all existing and future preferred equity and liabilities, whether secured or unsecured, of the Company’s subsidiaries, other than Alexandria Real Estate Equities, L.P.  We used the net proceeds of this offering initially to prepay $150.0 million of the outstanding principal balance on our unsecured senior bank term loan due in 2016 (“2016 Unsecured Senior Bank Term Loan”), to reduce the outstanding borrowings on our unsecured senior line of credit to zero, and held the remaining proceeds in cash and cash equivalents. As a result of the $150.0 million prepayment, we recognized a loss on early extinguishment of debt related to the write-off of a portion of unamortized loan fees in June 2013, totaling $560 thousand.
	Unsecured senior line of credit and unsecured senior bank term loans
	On July 26, 2013, we amended our 2016 Unsecured Senior Bank Term Loan to reduce the applicable interest rate margins in respect of the loan thereunder on outstanding borrowings. We extended the maturity of this loan by one month and we expect to repay the loan over the next one to three years.  In addition, on August 30, 2013, we amended our $1.5 billion unsecured senior line of credit and our unsecured senior bank term loan due in 2019 (“2019 Unsecured Senior Bank Term Loan”) to reduce the interest rate on outstanding borrowings, extend the maturity dates, and amend certain financial covenants. Also, on August 30, 2013, we amended our 2016 Unsecured Senior Bank Term Loan to conform certain financial covenants to those contained in the amended credit agreement related to our $1.5 billion unsecured senior line of credit and our 2019 Unsecured Senior Bank Term Loan. The maturity dates below reflect any available extension options that we control.
			Balance at 9/30/13				Maturity Date				Applicable Rate				Facility Fee
	Facility						Prior		Amended		Prior		Amended		Prior			Amended
	2016 Unsecured Senior Bank Term Loan		$	500	million		Jun-16		Jul-16		L +1.75%		L +1.20%		N/A			N/A
	2019 Unsecured Senior Bank Term Loan		$	600	million		Jan-17		Jan-19		L +1.50%		L +1.20%		N/A			N/A
	$1.5 billion unsecured senior line of credit		$	14	million		Apr-17		Jan-19		L +1.20%		L +1.10%		0.25	%		0.2	%
	On September 30, 2013, we paid down $100 million on our 2016 Unsecured Senior Bank Term Loan to a total outstanding balance of $500 million. During the three months ended September 30, 2013, in conjunction with the refinancing of our unsecured senior bank term loans and the partial repayment of $100 million of our 2016 Unsecured Senior Bank Term Loan, we recognized a loss on early extinguishment of debt totaling $1.4 million, due to the write-off of unamortized loan fees.
Borrowings under the unsecured senior line of credit will bear interest at a “Eurocurrency Rate” or a “Base Rate” specified in the amended unsecured line of credit agreement, plus, in either case, a specified margin (the “Applicable Margin”). The “Eurocurrency Rate” specified in the amended unsecured line of credit agreement is, as applicable, the rate per annum equal to (i) the London interbank offered rate (“LIBOR”) or a successor rate thereto as approved by the administrative agent for loans denominated in a LIBOR quoted currency (i.e., US Dollars, Euro, Sterling, or Yen), (ii) the average annual yield rates applicable to Canadian dollar banker's acceptances for loans denominated in Canadian dollars, (iii) the Bank Bill Swap Reference Bid rate for loans denominated in Australian dollars, or (iv) the rate designated with respect to the applicable alternative currency for loans denominated in a non-LIBOR quoted currency (other than Canadian or Australian dollars). The “Base Rate” specified in the amended unsecured line of credit agreement means for any day a fluctuating rate per annum equal to the highest of (a) the federal funds rate plus 1/2 of 1%, (b) the rate of interest in effect for such day as publicly announced from time to time by Bank of America as its “prime rate,” and (c) the Eurocurrency Rate plus 1.00%. The Applicable Margin for LIBOR borrowings under the unsecured senior line of credit as of September 30, 2013, was 1.10%, which is based on our existing credit rating as set by certain rating agencies. As of September 30, 2013, we had $14 million in borrowings outstanding on our $1.5 billion unsecured senior line of credit. Our unsecured senior line of credit is subject to an annual facility fee of 0.20% based on the aggregate commitments outstanding.
In addition, the terms of the unsecured senior line of credit and unsecured senior bank term loan agreements, among other things, limit the ability of the Company, Alexandria Real Estate Equities, L.P., and the Company’s subsidiaries to (i) consummate a merger, or consolidate or sell all or substantially all of the Company’s assets, and (ii) incur certain secured or unsecured indebtedness.  Additionally, the terms of the unsecured senior line of credit and unsecured senior bank term loan agreements include a restriction that may limit our ability to pay dividends, including distributions with respect to common stock or other equity interests, during any time a default is continuing, except to enable us to continue to qualify as a REIT for federal income tax purposes.  As of September 30, 2013, we were in compliance with all such covenants and there were no limitations pursuant to such covenants.
The following table outlines our interest expense for the three and nine months ended September 30, 2013 and 2012 (in thousands):
	Three Months Ended September 30,								Nine Months Ended September 30,
	2013				2012				2013				2012
Gross interest	$	32,959			$	33,855			$	96,668			$	99,094
Capitalized interest	(16,788		)		(16,763		)		(46,499		)		(47,854		)
Interest expense	$	16,171			$	17,092			$	50,169			$	51,240
Construction loan of unconsolidated joint venture
We have a 27.5% interest in an unconsolidated joint venture that is currently developing a building in the Longwood Medical Area of the Greater Boston market, with the construction costs funded primarily from a non-recourse secured construction loan with aggregate commitments of $213.2 million and an outstanding balance of $75.0 million as of September 30, 2013. See Note 3 for further information.

Interest_rate_swap_agreements_

Interest rate swap agreements (Notes)	9 Months Ended
	Sep. 30, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Interest rate swap agreements	'
	Interest rate swap agreements
	During the nine months ended September 30, 2013 and 2012, our interest rate swap agreements were used primarily to hedge the variable cash flows associated with certain of our existing LIBOR-based variable rate debt, including our unsecured senior line of credit and unsecured senior bank term loans.  The ineffective portion of the change in fair value of our interest rate swap agreements is required to be recognized directly in earnings.  During the nine months ended September 30, 2013 and 2012, our interest rate swap agreements were 100% effective; because of this, no hedge ineffectiveness was recognized in earnings.  The effective portion of changes in the fair values of our interest rate swap agreements that are designated and that qualify as cash flow hedges is classified in accumulated other comprehensive loss. Losses are subsequently reclassified into earnings in the period during which the hedged transactions affect earnings.  During the next 12 months, we expect to reclassify approximately $8.5 million in accumulated other comprehensive loss to interest expense as an increase to interest expense.
	As of September 30, 2013, and December 31, 2012, the fair values of our interest rate swap agreements were classified in accounts payable, accrued expenses, and tenant security deposits based upon their respective fair values, aggregating a liability balance of approximately $9.3 million and $20.7 million, respectively, which included accrued interest and adjustments for non-performance risk, with the offsetting adjustment reflected as unrealized loss in accumulated other comprehensive loss in total equity.  Under our interest rate swap agreements, we have no collateral posting requirements.
	We had the following outstanding interest rate swap agreements that were designated as cash flow hedges of interest rate risk as of September 30, 2013 (dollars in thousands):
				Interest Pay Rate (1)		Fair Value as of September 30, 2013			Notional Amount in Effect as of
	Effective Date		Termination Date						30-Sep-13		31-Dec-13
	29-Dec-06		31-Mar-14	4.99	%	$	(1,205	)	$	50,000	$	50,000
	30-Nov-09		31-Mar-14	5.015	%	(1,817		)	75,000		75,000
	30-Nov-09		31-Mar-14	5.023	%	(1,820		)	75,000		75,000
	31-Dec-12		31-Dec-13	0.64	%	(291		)	250,000		—
	31-Dec-12		31-Dec-13	0.64	%	(291		)	250,000		—
	31-Dec-12		31-Dec-13	0.644	%	(147		)	125,000		—
	31-Dec-12		31-Dec-13	0.644	%	(147		)	125,000		—
	31-Dec-13		31-Dec-14	0.977	%	(1,802		)	—		250,000
	31-Dec-13		31-Dec-14	0.976	%	(1,799		)	—		250,000
	Total					$	(9,319	)	$	950,000	$	700,000
	-1	In addition to the interest pay rate, borrowings outstanding under our unsecured senior bank term loans include an applicable margin of 1.20% as of September 30, 2013.

Fair_value_measurements_Notes

Fair value measurements (Notes)	9 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Fair value measurements	'
	Fair value measurements
	We are required to disclose fair value information about all financial instruments, whether or not recognized in the balance sheet, for which it is practicable to estimate fair value.  We measure and disclose the estimated fair value of financial assets and liabilities utilizing a fair value hierarchy that distinguishes between data obtained from sources independent of the reporting entity and the reporting entity’s own assumptions about market participant assumptions.  This hierarchy consists of three broad levels, as follows: (i) quoted prices in active markets for identical assets or liabilities, (ii) “significant other observable inputs,” and (iii) “significant unobservable inputs.”  “Significant other observable inputs” can include quoted prices for similar assets or liabilities in active markets, as well as inputs that are observable for the asset or liability, such as interest rates, foreign exchange rates, and yield curves that are observable at commonly quoted intervals.  “Significant unobservable inputs” are typically based on an entity’s own assumptions, since there is little, if any, related market activity.  In instances in which the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the level in the fair value hierarchy within which the entire fair value measurement falls is based on the lowest level of input that is significant to the fair value measurement in its entirety.  Our assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability.  There were no transfers between the levels in the fair value hierarchy during the three and nine months ended September 30, 2013 and 2012.
	The following tables set forth the assets and liabilities that we measure at fair value on a recurring basis by level within the fair value hierarchy as of September 30, 2013, and December 31, 2012 (in thousands):
						30-Sep-13
	Description		Total			Quoted Prices in			Significant			Significant
						Active Markets			Other			Unobservable
						for Identical			Observable			Inputs
						Assets			Inputs
	Assets:
	Marketable securities		$	3,256		$	3,256		$	—		$	—
	Liabilities:
	Interest rate swap agreements		$	9,319		$	—		$	9,319		$	—
						31-Dec-12
	Description		Total			Quoted Prices in			Significant			Significant
						Active Markets			Other			Unobservable
						for Identical			Observable			Inputs
						Assets			Inputs
	Assets:
	Marketable securities		$	2,709		$	2,709		$	—		$	—
	Liabilities:
	Interest rate swap agreements		$	20,661		$	—		$	20,661		$	—
	The carrying amounts of cash and cash equivalents, restricted cash, tenant receivables, other assets, accounts payable, accrued expenses, and tenant security deposits approximate fair value.  Our “available-for-sale” securities and our interest rate swap agreements, respectively, have been recognized at fair value.  The fair values of our secured notes payable, unsecured senior notes payable, unsecured senior line of credit, and unsecured senior bank term loans were estimated using widely accepted valuation techniques, including discounted cash flow analyses of “significant other observable inputs” such as available market information on discount and borrowing rates with similar terms, maturities, and credit ratings.  Because the valuations of our financial instruments are based on these types of estimates, the actual fair value of our financial instruments may differ materially if our estimates do not prove to be accurate.  Additionally, the use of different market assumptions or estimation methods may have a material effect on the estimated fair value amounts.
	As of September 30, 2013, and December 31, 2012, the book and fair values of our marketable securities, interest rate swap agreements, secured notes payable, unsecured senior notes payable, unsecured senior line of credit, and unsecured senior bank term loans were as follows (in thousands):
		30-Sep-13						31-Dec-12
		Book Value			Fair Value			Book Value			Fair Value
	Assets:
	Marketable securities	$	3,256		$	3,256		$	2,709		$	2,709
	Liabilities:
	Interest rate swap agreements	$	9,319		$	9,319		$	20,661		$	20,661
	Secured notes payable	$	708,653		$	761,047		$	716,144		$	788,455
	Unsecured senior notes payable	$	1,048,190		$	1,028,750		$	549,805		$	593,350
	Unsecured senior line of credit	$	14,000		$	13,738		$	566,000		$	567,196
	Unsecured senior bank term loans	$	1,100,000		$	1,088,322		$	1,350,000		$	1,405,124

Earnings_per_share_Notes

Earnings per share (Notes)	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Earnings per share	'
	Earnings per share
	We use income from continuing operations attributable to Alexandria’s common stockholders as the “control number” in determining whether potential common shares are dilutive or antidilutive to earnings per share.  Pursuant to the presentation and disclosure literature on gains or losses on sales or disposals by REITs and earnings per share required by the SEC and the Financial Accounting Standards Board, gains or losses on sales or disposals by a REIT that do not qualify as discontinued operations are classified below income from discontinued operations in the consolidated statements of income and included in the numerator for the computation of earnings per share for income from continuing operations.
	The land parcels we sold during the nine months ended September 30, 2013 and 2012, did not meet the criteria for classification as discontinued operations because the land parcels did not have significant operations prior to disposition.  Accordingly, for the nine months ended September 30, 2013 and 2012, we classified approximately $0.8 million and $1.9 million, respectively, as gain on sales of land parcels below income from discontinued operations, net, in the accompanying consolidated statements of income, and included the gain in income from continuing operations attributable to Alexandria’s common stockholders in the “control number,” or numerator for computation of earnings per share.
	We account for unvested restricted stock awards that contain nonforfeitable rights to dividends as participating securities and include these securities in the computation of earnings per share using the two-class method.  Our Series D convertible preferred stock (“Series D Convertible Preferred Stock”) is not a participating security, and is not included in the computation of earnings per share using the two-class method.  Under the two-class method, we allocate net income after preferred stock dividends, preferred stock redemption charge, and amounts attributable to noncontrolling interests to common stockholders and unvested restricted stock awards based on their respective participation rights to dividends declared (or accumulated) and undistributed earnings.  Diluted earnings per share is computed using the weighted average shares of common stock outstanding determined for the basic earnings per share computation plus the effect of any dilutive securities, including the dilutive effect of stock options using the treasury stock method and potential common shares issuable upon conversion of our 8.00% unsecured senior convertible notes (“8.00% Unsecured Senior Convertible Notes”), during the period the notes were outstanding.
	The table below is a reconciliation of the numerators and denominators of the basic and diluted earnings per share computations for the three and nine months ended September 30, 2013 and 2012 (in thousands, except per share amounts):
		Three Months Ended September 30,						Nine Months Ended September 30,
		2013			2012			2013			2012
	Income from continuing operations	$	32,517		$	22,501		$	94,262		$	69,695
	Gain on sale of land parcel	—			—			772			1,864
	Net income attributable to noncontrolling interests	(960		)	(828		)	(2,922		)	(2,390		)
	Dividends on preferred stock	(6,472		)	(6,471		)	(19,414		)	(20,857		)
	Preferred stock redemption charge	—			—			—			(5,978		)
	Net income attributable to unvested restricted stock awards	(442		)	(360		)	(1,187		)	(866		)
	Income from continuing operations attributable to Alexandria’s common stockholders – basic and diluted	24,643			14,842			71,511			41,468
	(Loss) income from discontinued operations, net	(64		)	(4,196		)	993			5,162
	Net income attributable to Alexandria’s common stockholders – basic and diluted	$	24,579		$	10,646		$	72,504		$	46,630
	Weighted average shares of common stock outstanding – basic and diluted	70,900			62,364			67,040			61,847
	Earnings per share attributable to Alexandria’s common stockholders – basic and diluted:
	Continuing operations	$	0.35		$	0.24		$	1.07		$	0.67
	Discontinued operations, net	—			(0.07		)	0.01			0.08
	Earnings per share – basic and diluted	$	0.35		$	0.17		$	1.08		$	0.75
	For purposes of calculating diluted earnings per share, we did not assume conversion of our 8.00% Unsecured Senior Convertible Notes for the three and nine months ended September 30, 2013 and 2012, since the impact was antidilutive to earnings per share attributable to Alexandria’s common stockholders from continuing operations during those periods.
	For purposes of calculating diluted earnings per share, we did not assume conversion of our Series D Convertible Preferred Stock for the three and nine months ended September 30, 2013 and 2012, since the impact was antidilutive to earnings per share attributable to Alexandria’s common stockholders from continuing operations during those periods.

Net_income_attributable_to_Ale

Net income attributable to Alexandria Real Estate Equities, Inc. (Notes)	9 Months Ended
	Sep. 30, 2013
Net Income (Loss) Attributable to Parent [Abstract]	'
Net income attributable to Alexandria Real Estate Equities, Inc.	'
	Net income attributable to Alexandria Real Estate Equities, Inc.
	The following table shows income from continuing and discontinued operations attributable to Alexandria Real Estate Equities, Inc. for the three and nine months ended September 30, 2013 and 2012 (in thousands):
		Three Months Ended September 30,						Nine Months Ended September 30,
		2013			2012			2013			2012
	Income from continuing operations	$	32,517		$	22,501		$	94,262		$	69,695
	Gain on sale of land parcels	—			—			772			1,864
	Less: net income attributable to noncontrolling interests	(960		)	(828		)	(2,922		)	(2,390		)
	Income from continuing operations attributable to Alexandria	31,557			21,673			92,112			69,169
	(Loss) income from discontinued operations, net	(64		)	(4,196		)	993			5,162
	Less: net income from discontinued operations attributable to noncontrolling interests	—			—			—			—
	Net income attributable to Alexandria	$	31,493		$	17,477		$	93,105		$	74,331

Stockholders_equity_Notes

Stockholders' equity (Notes)	9 Months Ended
	Sep. 30, 2013
Stockholders' Equity Note [Abstract]	'
Stockholders' equity	'
	Stockholders’ equity
	Secondary offering of common stock
	In May 2013, we sold approximately 7.6 million shares of our common stock in a secondary offering (including 1.0 million shares issued pursuant to the exercise in full of the underwriters’ option to purchase additional shares). The shares were issued at a price of $73.50 per share, resulting in aggregate net proceeds of approximately $535.7 million (after deducting underwriting discounts and commissions).
	“At the market” common stock offering program
	In June 2012, we established an “at the market” common stock offering program under which we may sell, from time to time, up to an aggregate of $250 million of our common stock through our sales agents, BNY Mellon Capital Markets, LLC and Credit Suisse Securities (USA) LLC, during a three-year period. As of September 30, 2013, approximately $150.0 million of our common stock remained available for issuance under the “at the market” common stock offering program.
	Dividends
	In September 2013, we declared cash dividends for the third quarter of 2013, on our common stock aggregating approximately $48.7 million, or $0.68 per share.  In September 2013, we also declared cash dividends for the third quarter of 2013, on our Series D Convertible Preferred Stock aggregating approximately $4.4 million, or $0.4375 per share.  Additionally, we declared cash dividends for the third quarter of 2013, on our Series E cumulative redeemable preferred stock (“Series E Cumulative Redeemable Preferred Stock”) aggregating approximately $2.1 million, or $0.403125 per share.  In October 2013, we paid the cash dividends for the third quarter of 2013, on our common stock, Series D Convertible Preferred Stock, and Series E Cumulative Redeemable Preferred Stock.
	Accumulated other comprehensive loss
	Accumulated other comprehensive loss attributable to Alexandria consists of the following (in thousands):
		Unrealized Gain on Marketable Securities			Unrealized Loss on Interest Rate			Unrealized Loss on Foreign Currency Translation			Total
					Swap Agreements
	Balance as of December 31, 2012	$	1,473		$	(20,661	)	$	(5,645	)	$	(24,833	)
	Other comprehensive income (loss) before reclassifications	323			(704		)	(26,378		)	(26,759		)
	Amounts reclassified from other comprehensive income	(480		)	12,046			—			11,566
	Net other comprehensive (loss) income	(157		)	11,342			(26,378		)	(15,193		)
	Balance as of September 30, 2013	$	1,316		$	(9,319	)	$	(32,023	)	$	(40,026	)
	The effects on amounts reclassified from accumulated other comprehensive income related to unrealized gain on marketable securities and unrealized loss on interest rate swap agreements are recognized in other income and interest expenses, respectively, in the accompanying consolidated statements of income.
	Preferred stock and excess stock authorizations
	Our charter authorizes the issuance of up to 100 million shares of preferred stock, of which 15.2 million shares were issued and outstanding as of September 30, 2013.  In addition, 200 million shares of “excess stock” (as defined in our charter) are authorized, none of which were issued and outstanding as of September 30, 2013.

Noncontrolling_interests_Notes

Noncontrolling interests (Notes)	9 Months Ended
	Sep. 30, 2013
Noncontrolling Interest [Abstract]	'
Noncontrolling interests	'
	Noncontrolling interests
	Noncontrolling interests represent the third-party interests in certain entities in which we have a controlling interest.  These entities owned 10 properties and three development parcels as of September 30, 2013, and are included in our consolidated financial statements.  Noncontrolling interests are adjusted for additional contributions and distributions, the proportionate share of the net earnings or losses, and other comprehensive income or loss.  Distributions, profits, and losses related to these entities are allocated in accordance with the respective operating agreements.
	Certain of our noncontrolling interests have the right to require us to redeem their ownership interests in the respective entities.  We classify these ownership interests in the entities as redeemable noncontrolling interests outside of total equity in the accompanying consolidated balance sheets.  Redeemable noncontrolling interests are adjusted for additional contributions and distributions, the proportionate share of the net earnings or losses, and other comprehensive income or loss.  Distributions, profits, and losses related to these entities are allocated in accordance with the respective operating agreements.  If the carrying amount of a redeemable noncontrolling interest is less than the maximum redemption value at the balance sheet date, such amount is adjusted to the maximum redemption value.  Subsequent declines in the redemption value are recognized only to the extent that previous increases have been recognized.  As of September 30, 2013, and December 31, 2012, our redeemable noncontrolling interest balances were approximately $14.5 million and $14.6 million, respectively.  Our remaining noncontrolling interests, aggregating approximately $47.5 million and $46.6 million as of September 30, 2013, and December 31, 2012, respectively, do not have rights to require us to purchase their ownership interests and are classified in total equity in the accompanying consolidated balance sheets.

Discontinued_operations_Notes

Discontinued operations (Notes)	9 Months Ended
	Sep. 30, 2013
Discontinued Operations and Disposal Groups [Abstract]	'
Discontinued operations	'
	Discontinued operations
	The following is a summary of net assets of discontinued operations and income from discontinued operations, net (in thousands):
		30-Sep-13				31-Dec-12
	Properties “held for sale,” net	$	4,510			$	76,440
	Other assets	14				4,546
	Total assets	4,524				80,986
	Total liabilities	(32		)		(3,233		)
	Net assets of discontinued operations	$	4,492			$	77,753
			Three Months Ended September 30,							Nine Months Ended September 30,
			2013				2012			2013		2012
	Total revenues		$	4			$	8,418		$	3,741	$	26,556
	Operating expenses		68				2,788			1,697		8,337
	Total revenues less operating expenses from discontinued operations		(64		)		5,630			2,044		18,219
	Depreciation expense		—				1,589			930		4,822
	(Gain) loss on sale of real estate		—				(1,562		)	121		(1,564		)
	Impairment of real estate		—				9,799			—		9,799
	(Loss) income from discontinued operations, net (1)		$	(64	)		$	(4,196	)	$	993	$	5,162
	-1	(Loss) income from discontinued operations, net, includes the results of operations for two operating properties that were classified as “held for sale” as of September 30, 2013, as well as the results of operations (prior to disposition) and (gain) loss on sale of real estate attributable to 10 properties sold during the period from January 1, 2012, to September 30, 2013.

Subsequent_events_Notes

Subsequent events (Notes)	9 Months Ended
	Sep. 30, 2013
Subsequent Events [Abstract]	'
Subsequent events	'
	Subsequent events
	Update on our ground-up development at 499 Illinois Street
	In October 2013, we executed a 10-year lease with a high-quality biopharmaceutical company for 43,625 RSF at 499 Illinois Street in the Mission Bay submarket of the San Francisco Bay Area which is now 77% pre-leased.

Condensed_consolidating_financ

Condensed consolidating financial information (Notes)	9 Months Ended
	Sep. 30, 2013
Condensed Consolidated Financial Information [Abstract]	'
Condensed Consolidating Financial Information Disclosure	'
	Condensed consolidating financial information
	Alexandria Real Estate Equities, Inc. (the “Issuer”) has sold certain debt securities registered under the Securities Act, as amended, that are fully and unconditionally guaranteed by Alexandria Real Estate Equities, L.P. (the “LP”), an indirectly 100% owned subsidiary of the Issuer.  The Company’s other subsidiaries, including, but not limited to, the subsidiaries that own substantially all of its real estate (collectively, the “Combined Non-Guarantor Subsidiaries”) will not provide a guarantee of such securities, including the subsidiaries that are partially or 100% owned by the LP.  The following condensed consolidating financial information presents the condensed consolidating balance sheets as of September 30, 2013, and December 31, 2012, the condensed consolidating statements of income and comprehensive income for the three and nine months ended September 30, 2013 and 2012, and the condensed consolidating statements of cash flow for the nine months ended September 30, 2013 and 2012, for the Issuer, the Guarantor Subsidiary (the LP), the Combined Non-Guarantor Subsidiaries, the eliminations necessary to arrive at the information for Alexandria on a consolidated basis, and consolidated amounts.  In presenting the condensed consolidating financial statements, the equity method of accounting has been applied to (i) the Issuer’s interests in the Guarantor Subsidiary and the Combined Non-Guarantor Subsidiaries, (ii) the Guarantor Subsidiary’s interests in the Combined Non-Guarantor Subsidiaries, and (iii) the Combined Non-Guarantor Subsidiaries’ interests in the Guarantor Subsidiary, where applicable, even though all such subsidiaries meet the requirements to be consolidated under GAAP.  All intercompany balances and transactions between the Issuer, the Guarantor Subsidiary, and the Combined Non-Guarantor Subsidiaries have been eliminated, as shown in the column “Eliminations.”  All assets and liabilities have been allocated to the Issuer, the Guarantor Subsidiary, and the Combined Non-Guarantor Subsidiaries generally based on legal entity ownership.
	Condensed Consolidating Balance Sheet
	as of September 30, 2013
	(In thousands)
	(Unaudited)
		Alexandria Real Estate Equities, Inc.			Alexandria			Combined			Eliminations			Consolidated
		(Issuer)			Real Estate			Non-
					Equities, L.P.			Guarantor
					(Guarantor			Subsidiaries
					Subsidiary)
	Assets
	Investments in real estate, net	$	—		$	—		$	6,613,761		$	—		$	6,613,761
	Cash and cash equivalents	14,667			—			39,172			—			53,839
	Restricted cash	61			—			30,593			—			30,654
	Tenant receivables	—			—			8,671			—			8,671
	Deferred rent	—			—			182,909			—			182,909
	Deferred leasing and financing costs, net	38,462			—			141,343			—			179,805
	Investments	—			11,828			117,335			—			129,163
	Investments in and advances to affiliates	6,119,819			5,655,063			116,004			(11,890,886		)	—
	Other assets	17,801			—			141,766			—			159,567
	Total assets	$	6,190,810		$	5,666,891		$	7,391,554		$	(11,890,886	)	$	7,358,369
	Liabilities, Noncontrolling Interests, and Equity
	Secured notes payable	$	—		$	—		$	708,653		$	—		$	708,653
	Unsecured senior notes payable	1,048,190			—			—			—			1,048,190
	Unsecured senior line of credit	14,000			—			—			—			14,000
	Unsecured senior bank term loans	1,100,000			—			—			—			1,100,000
	Accounts payable, accrued expenses, and tenant security deposits	55,467			—			396,672			—			452,139
	Dividends payable	54,125			—			288			—			54,413
	Total liabilities	2,271,782			—			1,105,613			—			3,377,395
	Redeemable noncontrolling interests	—			—			14,475			—			14,475
	Alexandria’s stockholders’ equity	3,919,028			5,666,891			6,223,995			(11,890,886		)	3,919,028
	Noncontrolling interests	—			—			47,471			—			47,471
	Total equity	3,919,028			5,666,891			6,271,466			(11,890,886		)	3,966,499
	Total liabilities, noncontrolling interests, and equity	$	6,190,810		$	5,666,891		$	7,391,554		$	(11,890,886	)	$	7,358,369
	Condensed Consolidating Balance Sheet
	as of December 31, 2012
	(In thousands)
	(Unaudited)
		Alexandria			Alexandria			Combined			Eliminations			Consolidated
		Real Estate			Real Estate			Non-
		Equities, Inc.			Equities, L.P.			Guarantor
		(Issuer)			(Guarantor			Subsidiaries
					Subsidiary)
	Assets
	Investments in real estate, net	$	38,616		$	—		$	6,385,962		$	—		$	6,424,578
	Cash and cash equivalents	98,567			1,913			40,491			—			140,971
	Restricted cash	52			—			39,895			—			39,947
	Tenant receivables	1			—			8,448			—			8,449
	Deferred rent	1,876			—			168,520			—			170,396
	Deferred leasing and financing costs, net	31,373			—			128,675			—			160,048
	Investments	—			12,591			102,457			—			115,048
	Investments in and advances to affiliates	5,833,368			5,358,883			110,100			(11,302,351		)	—
	Intercompany note receivable	3,021			—			—			(3,021		)	—
	Other assets	17,613			—			73,066			—			90,679
	Total assets	$	6,024,487		$	5,373,387		$	7,057,614		$	(11,305,372	)	$	7,150,116
	Liabilities, Noncontrolling Interests, and Equity
	Secured notes payable	$	—		$	—		$	716,144		$	—		$	716,144
	Unsecured senior notes payable	549,805			—			—			—			549,805
	Unsecured senior line of credit	566,000			—			—			—			566,000
	Unsecured senior bank term loans	1,350,000			—			—			—			1,350,000
	Accounts payable, accrued expenses, and tenant security deposits	75,728			—			347,980			—			423,708
	Dividends payable	41,103			—			298			—			41,401
Intercompany notes payable	—			—			3,021			(3,021		)	—
Total liabilities	2,582,636			—			1,067,443			(3,021		)	3,647,058
Redeemable noncontrolling interests	—			—			14,564			—			14,564
Alexandria’s stockholders’ equity	3,441,851			5,373,387			5,928,964			(11,302,351		)	3,441,851
Noncontrolling interests	—			—			46,643			—			46,643
Total equity	3,441,851			5,373,387			5,975,607			(11,302,351		)	3,488,494
Total liabilities, noncontrolling interests, and equity	$	6,024,487		$	5,373,387		$	7,057,614		$	(11,305,372	)	$	7,150,116
Condensed Consolidating Statement of Income
for the Three Months Ended September 30, 2013
(In thousands)
(Unaudited)
	Alexandria			Alexandria			Combined			Eliminations			Consolidated
	Real Estate			Real Estate			Non-
	Equities, Inc.			Equities, L.P.			Guarantor
	(Issuer)			(Guarantor			Subsidiaries
				Subsidiary)
Revenues:
Rental	$	—		$	—		$	116,302		$	—		$	116,302
Tenant recoveries	—			—			38,757			—			38,757
Other income	2,802			(1		)	3,965			(3,195		)	3,571
Total revenues	2,802			(1		)	159,024			(3,195		)	158,630
Expenses:
Rental operations	—			—			47,742			—			47,742
General and administrative	10,141			—			4,720			(3,195		)	11,666
Interest	10,238			—			5,933			—			16,171
Depreciation and amortization	1,472			—			47,630			—			49,102
Loss on early extinguishment of debt	1,432			—			—			—			1,432
Total expenses	23,283			—			106,025			(3,195		)	126,113
Income (loss) from continuing operations before equity in earnings of affiliates	(20,481		)	(1		)	52,999			—			32,517
Equity in earnings of affiliates	51,975			48,477			959			(101,411		)	—
Income from continuing operations	31,494			48,476			53,958			(101,411		)	32,517
(Loss) income from discontinued operations, net	(1		)	—			(63		)	—			(64		)
Net income	31,493			48,476			53,895			(101,411		)	32,453
Net income attributable to noncontrolling interests	—			—			960			—			960
Dividends on preferred stock	6,472			—			—			—			6,472
Net income attributable to unvested restricted stock awards	442			—			—			—			442
Net income attributable to Alexandria’s common stockholders	$	24,579		$	48,476		$	52,935		$	(101,411	)	$	24,579
Condensed Consolidating Statement of Income
for the Three Months Ended September 30, 2012
(In thousands)
(Unaudited)
	Alexandria			Alexandria			Combined			Eliminations			Consolidated
	Real Estate			Real Estate			Non-
	Equities, Inc.			Equities, L.P.			Guarantor
	(Issuer)			(Guarantor			Subsidiaries
				Subsidiary)
Revenues:
Rental	$	—		$	—		$	106,216		$	—		$	106,216
Tenant recoveries	—			—			34,006			—			34,006
Other income	2,785			51			3,209			(3,417		)	2,628
Total revenues	2,785			51			143,431			(3,417		)	142,850
Expenses:
Rental operations	—			—			44,203			—			44,203
General and administrative	9,587			—			6,300			(3,417		)	12,470
Interest	11,785			—			5,307			—			17,092
Depreciation and amortization	1,725			—			44,859			—			46,584
Total expenses	23,097			—			100,669			(3,417		)	120,349
Income (loss) from continuing operations before equity in earnings of affiliates	(20,312		)	51			42,762			—			22,501
Equity in earnings of affiliates	41,380			42,064			804			(84,248		)	—
Income from continuing operations	21,068			42,115			43,566			(84,248		)	22,501
(Loss) income from discontinued operations, net	(3,591		)	—			(605		)	—			(4,196		)
Net income	17,477			42,115			42,961			(84,248		)	18,305
Net income attributable to noncontrolling interests	—			—			828			—			828
Dividends on preferred stock	6,471			—			—			—			6,471
Net income attributable to unvested restricted stock awards	360			—			—			—			360
Net income attributable to Alexandria’s common stockholders	$	10,646		$	42,115		$	42,133		$	(84,248	)	$	10,646
Condensed Consolidating Statement of Income
for the Nine Months Ended September 30, 2013
(In thousands)
(Unaudited)
	Alexandria			Alexandria			Combined			Eliminations			Consolidated
	Real Estate			Real Estate			Non-
	Equities, Inc.			Equities, L.P.			Guarantor
	(Issuer)			(Guarantor			Subsidiaries
				Subsidiary)
Revenues:
Rental	$	—		$	—		$	342,821		$	—		$	342,821
Tenant recoveries	—			—			110,291			—			110,291
Other income	8,071			(142		)	11,636			(9,432		)	10,133
Total revenues	8,071			(142		)	464,748			(9,432		)	463,245
Expenses:
Rental operations	—			—			139,289			—			139,289
General and administrative	32,574			—			12,644			(9,432		)	35,786
Interest	32,048			—			18,121			—			50,169
Depreciation and amortization	4,393			—			137,354			—			141,747
Loss on early extinguishment of debt	1,992			—			—			—			1,992
Total expenses	71,007			—			307,408			(9,432		)	368,983
Income (loss) from continuing operations before equity in earnings of affiliates	(62,936		)	(142		)	157,340			—			94,262
Equity in earnings of affiliates	155,694			144,660			2,858			(303,212		)	—
Income from continuing operations	92,758			144,518			160,198			(303,212		)	94,262
Income from discontinued operations, net	347			—			646			—			993
Gain on sale of land parcel	—			—			772			—			772
Net income	93,105			144,518			161,616			(303,212		)	96,027
Net income attributable to noncontrolling interests	—			—			2,922			—			2,922
Dividends on preferred stock	19,414			—			—			—			19,414
Net income attributable to unvested restricted stock awards	1,187			—			—			—			1,187
Net income attributable to Alexandria’s common stockholders	$	72,504		$	144,518		$	158,694		$	(303,212	)	$	72,504
Condensed Consolidating Statement of Income
for the Nine Months Ended September 30, 2012
(In thousands)
(Unaudited)
	Alexandria			Alexandria			Combined			Eliminations			Consolidated
	Real Estate			Real Estate			Non-
	Equities, Inc.			Equities, L.P.			Guarantor
	(Issuer)			(Guarantor			Subsidiaries
				Subsidiary)
Revenues:
Rental	$	—		$	—		$	311,746		$	—		$	311,746
Tenant recoveries	—			—			97,769			—			97,769
Other income	7,593			891			16,095			(9,940		)	14,639
Total revenues	7,593			891			425,610			(9,940		)	424,154
Expenses:
Rental operations	—			—			126,758			—			126,758
General and administrative	32,030			1			13,034			(9,940		)	35,125
Interest	34,460			—			16,780			—			51,240
Depreciation and amortization	3,781			—			135,330			—			139,111
Loss on early extinguishment of debt	2,225			—			—			—			2,225
Total expenses	72,496			1			291,902			(9,940		)	354,459
Income (loss) from continuing operations before equity in earnings of affiliates	(64,903		)	890			133,708			—			69,695
Equity in earnings of affiliates	140,267			134,346			2,662			(277,275		)	—
Income from continuing operations	75,364			135,236			136,370			(277,275		)	69,695
Income (loss) from discontinued operations, net	(1,033		)	—			6,195			—			5,162
Gain on sale of land parcel	—			—			1,864			—			1,864
Net income	74,331			135,236			144,429			(277,275		)	76,721
Net income attributable to noncontrolling interests	—			—			2,390			—			2,390
Dividends on preferred stock	20,857			—			—			—			20,857
Preferred stock redemption charge	5,978			—			—			—			5,978
Net income attributable to unvested restricted stock awards	866			—			—			—			866
Net income attributable to Alexandria’s common stockholders	$	46,630		$	135,236		$	142,039		$	(277,275	)	$	46,630
Condensed Consolidating Statement of Comprehensive Income
for the Three Months Ended September 30, 2013
(In thousands)
(Unaudited)
	Alexandria			Alexandria			Combined			Eliminations			Consolidated
	Real Estate			Real Estate			Non-
	Equities, Inc.			Equities, L.P.			Guarantor
	(Issuer)			(Guarantor			Subsidiaries
				Subsidiary)
Net income	$	31,493		$	48,476		$	53,895		$	(101,411	)	$	32,453
Other comprehensive income:
Unrealized gains (losses) on marketable securities:
Unrealized holding gains (losses) arising during the period	—			(796		)	759			—			(37		)
Reclassification adjustment for (gains) losses included in net income	—			519			(769		)	—			(250		)
Unrealized gains (losses) on marketable securities, net	—			(277		)	(10		)	—			(287		)
Unrealized gains on interest rate swaps:
Unrealized interest rate swap gains arising during the period	(676		)	—			—			—			(676		)
Reclassification adjustment for amortization of interest expense included in net income	3,904			—			—			—			3,904
Unrealized gains on interest rate swaps, net	3,228			—			—			—			3,228
Foreign currency translation losses	—			—			(3,404		)	—			(3,404		)
Total other comprehensive income (loss)	3,228			(277		)	(3,414		)	—			(463		)
Comprehensive income	34,721			48,199			50,481			(101,411		)	31,990
Less: comprehensive income attributable to noncontrolling interests	—			—			(933		)	—			(933		)
Comprehensive income attributable to Alexandria’s common stockholders	$	34,721		$	48,199		$	49,548		$	(101,411	)	$	31,057
Condensed Consolidating Statement of Comprehensive Income
for the Three Months Ended September 30, 2012
(In thousands)
(Unaudited)
	Alexandria			Alexandria			Combined			Eliminations			Consolidated
	Real Estate			Real Estate			Non-
	Equities, Inc.			Equities, L.P.			Guarantor
	(Issuer)			(Guarantor			Subsidiaries
				Subsidiary)
Net income	$	17,477		$	42,115		$	42,961		$	(84,248	)	$	18,305
Other comprehensive income:
Unrealized gains (losses) on marketable securities:
Unrealized holding gains (losses) arising during the period	—			23			773			—			796
Reclassification adjustment for losses included in net income	—			(11		)	(1,410		)	—			(1,421		)
Unrealized gains (losses) on marketable securities, net	—			12			(637		)	—			(625		)
Unrealized gains (losses) on interest rate swaps:
Unrealized interest rate swap gains (losses) arising during the period	(2,818		)	—			—			—			(2,818		)
Reclassification adjustment for amortization of interest expense included in net income	5,956			—			—			—			5,956
Unrealized gains (losses) on interest rate swaps, net	3,138			—			—			—			3,138
Foreign currency translation losses	—			—			15,104			—			15,104
Total other comprehensive income	3,138			12			14,467			—			17,617
Comprehensive income	20,615			42,127			57,428			(84,248		)	35,922
Less: comprehensive income attributable to noncontrolling interests	—			—			(805		)	—			(805		)
Comprehensive income attributable to Alexandria’s common stockholders	$	20,615		$	42,127		$	56,623		$	(84,248	)	$	35,117
Condensed Consolidating Statement of Comprehensive Income
for the Nine Months Ended September 30, 2013
(In thousands)
(Unaudited)
	Alexandria			Alexandria			Combined			Eliminations			Consolidated
	Real Estate			Real Estate			Non-
	Equities, Inc.			Equities, L.P.			Guarantor
	(Issuer)			(Guarantor			Subsidiaries
				Subsidiary)
Net income	$	93,105		$	144,518		$	161,616		$	(303,212	)	$	96,027
Other comprehensive income:
Unrealized gains on marketable securities:
Unrealized holding gains (losses) arising during the period	—			(391		)	714			—			323
Reclassification adjustment for (gains) losses included in net income	—			144			(624		)	—			(480		)
Unrealized gains on marketable securities, net	—			(247		)	90			—			(157		)
Unrealized gains on interest rate swaps:
Unrealized interest rate swap losses arising during the period	(704		)	—			—			—			(704		)
Reclassification adjustment for amortization of interest expense included in net income	12,046			—			—			—			12,046
Unrealized gains on interest rate swaps, net	11,342			—			—			—			11,342
Foreign currency translation losses	—			—			(26,461		)	—			(26,461		)
Total other comprehensive income	11,342			(247		)	(26,371		)	—			(15,276		)
Comprehensive income	104,447			144,271			135,245			(303,212		)	80,751
Less: comprehensive income attributable to noncontrolling interests	—			—			(2,839		)	—			(2,839		)
Comprehensive income attributable to Alexandria's common stockholders	$	104,447		$	144,271		$	132,406		$	(303,212	)	$	77,912
Condensed Consolidating Statement of Comprehensive Income
for the Nine Months Ended September 30, 2012
(In thousands)
(Unaudited)
	Alexandria			Alexandria			Combined			Eliminations			Consolidated
	Real Estate			Real Estate			Non-
	Equities, Inc.			Equities, L.P.			Guarantor
	(Issuer)			(Guarantor			Subsidiaries
				Subsidiary)
Net income	$	74,331		$	135,236		$	144,429		$	(277,275	)	$	76,721
Other comprehensive income:
Unrealized gains (losses) on marketable securities:
Unrealized holding gains arising during the period	—			10			1,353			—			1,363
Reclassification adjustment for (gains) losses included in net income	—			172			(2,279		)	—			(2,107		)
Unrealized gains (losses) on marketable securities, net	—			182			(926		)	—			(744		)
Unrealized gains on interest rate swaps:
Unrealized interest rate swap losses arising during the period	(9,982		)	—			—			—			(9,982		)
Reclassification adjustment for amortization of interest expense included in net income	17,626			—			—			—			17,626
Unrealized gains on interest rate swaps, net	7,644			—			—			—			7,644
Foreign currency translation losses	—			—			7,871			—			7,871
Total other comprehensive income	7,644			182			6,945			—			14,771
Comprehensive income	81,975			135,418			151,374			(277,275		)	91,492
Less: comprehensive income attributable to noncontrolling interests	—			—			(2,379		)	—			(2,379		)
Comprehensive income attributable to Alexandria’s common stockholders	$	81,975		$	135,418		$	148,995		$	(277,275	)	$	89,113
Condensed Consolidating Statement of Cash Flows
for the Nine Months Ended September 30, 2013
(In thousands)
(Unaudited)
	Alexandria Real			Alexandria Real			Combined			Eliminations			Consolidated
	Estate Equities,			Estate Equities,			Non-Guarantor
	Inc. (Issuer)			L.P. (Guarantor			Subsidiaries
				Subsidiary)
Operating Activities
Net income	$	93,105		$	144,518		$	161,616		$	(303,212	)	$	96,027
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	4,393			—			138,284			—			142,677
Loss on early extinguishment of debt	1,992			—			—			—			1,992
Gain on sale of land parcel	—			—			(772		)	—			(772		)
Loss on sale of real estate	—			—			121			—			121
Amortization of loan fees and costs	5,148			—			2,152			—			7,300
Amortization of debt premiums/discounts	75			—			308			—			383
Amortization of acquired above and below market leases	—			—			(2,490		)	—			(2,490		)
Deferred rent	—			—			(20,007		)	—			(20,007		)
Stock compensation expense	11,541			—			—			—			11,541
Equity in (income) loss related to subsidiaries	(155,694		)	(144,660		)	(2,858		)	303,212			—
Gain on sales of investments	—			(152		)	(4,564		)	—			(4,716		)
Loss on sales of investments	—			298			231			—			529
Changes in operating assets and liabilities:
Restricted cash	(8		)	—			1,251			—			1,243
Tenant receivables	1			—			(272		)	—			(271		)
Deferred leasing costs	2,421			—			(39,611		)	—			(37,190		)
Other assets	(5,570		)	—			(5,858		)	—			(11,428		)
Intercompany receivables and payables	3,021			—			(3,021		)	—			—
Accounts payable, accrued expenses, and tenant security deposits	(9,599		)	—			61,036			—			51,437
Net cash provided by (used in) operating activities	(49,174		)	4			285,546			—			236,376
Investing Activities
Proceeds from sale of properties	10,796			—			91,019			—			101,815
Additions to properties	3,539			—			(453,679		)	—			(450,140		)
Purchase of properties	—			—			(24,537		)	—			(24,537		)
Change in restricted cash related to construction projects	—			—			5,711			—			5,711
Contributions to unconsolidated real estate entity	—			—			(13,881		)	—			(13,881		)
Investments in subsidiaries	(126,967		)	(170,033		)	(3,045		)	300,045			—
Additions to investments	—			—			(22,835		)	—			(22,835		)
Proceeds from investments	—			1,594			11,156			—			12,750
Net cash provided by (used in) investing activities	$	(112,632	)	$	(168,439	)	$	(410,091	)	$	300,045		$	(391,117	)
Condensed Consolidating Statement of Cash Flows (continued)
for the Nine Months Ended September 30, 2013
(In thousands)
(Unaudited)
	Alexandria Real			Alexandria Real			Combined			Eliminations			Consolidated
	Estate Equities,			Estate Equities,			Non-Guarantor
	Inc. (Issuer)			L.P. (Guarantor			Subsidiaries
				Subsidiary)
Financing Activities
Borrowings from secured notes payable	$	—		$	—		$	26,319		$	—		$	26,319
Repayments of borrowings from secured notes payable	—			—			(34,120		)	—			(34,120		)
Proceeds from issuance of senior notes payable	498,561			—			—			—			498,561
Principal borrowings from unsecured senior line of credit	319,000			—			—			—			319,000
Repayments of borrowings from unsecured senior line of credit	(871,000		)	—			—			—			(871,000		)
Repayments of unsecured senior bank term loans	(250,000		)	—			—			—			(250,000		)
Repurchase of unsecured senior convertible notes	(384		)	—			—			—			(384		)
Transfer to/from parent company	—			166,522			133,523			(300,045		)	—
Change in restricted cash related to financings	(1		)	—			924			—			923
Deferred financing costs paid	(14,175		)	—			(2,072		)	—			(16,247		)
Proceeds from common stock offerings	535,686			—			—			—			535,686
Dividends paid on common stock	(120,367		)	—			—			—			(120,367		)
Dividends paid on preferred stock	(19,414		)	—			—			—			(19,414		)
Distributions to noncontrolling interests	—			—			(2,100		)	—			(2,100		)
Net cash provided by (used in) financing activities	77,906			166,522			122,474			(300,045		)	66,857
Effect of foreign exchange rate changes on cash and cash equivalents	—			—			752			—			752
Net increase (decrease) in cash and cash equivalents	(83,900		)	(1,913		)	(1,319		)	—			(87,132		)
Cash and cash equivalents at beginning of period	98,567			1,913			40,491			—			140,971
Cash and cash equivalents at end of period	$	14,667		$	—		$	39,172		$	—		$	53,839
Supplemental Disclosure of Cash Flow Information
Cash paid during the period for interest, net of interest capitalized	$	16,569		$	—		$	17,712		$	—		$	34,281
Non-Cash Investing Activities
Note receivable from sale of real estate	$	29,820		$	—		$	9,000		$	—		$	38,820
Condensed Consolidating Statement of Cash Flows
for the Nine Months Ended September 30, 2012
(In thousands)
(Unaudited)
	Alexandria Real			Alexandria Real			Combined			Eliminations			Consolidated
	Estate Equities,			Estate Equities,			Non-Guarantor
	Inc. (Issuer)			L.P. (Guarantor			Subsidiaries
				Subsidiary)
Operating Activities
Net income	$	74,331		$	135,236		$	144,429		$	(277,275	)	$	76,721
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,781			—			140,152			—			143,933
Loss on early extinguishment of debt	2,225			—			—			—			2,225
Gain on sale of land parcel	—			—			(1,864		)	—			(1,864		)
Gain on sale of real estate	—			—			(1,564		)	—			(1,564		)
Non-cash impairment of real estate	4,799						5,000						9,799
Amortization of loan fees and costs	5,307			—			2,020			—			7,327
Amortization of debt premiums/discounts	104			—			297			—			401
Amortization of acquired above and below market leases	—			—			(2,356		)	—			(2,356		)
Deferred rent	164			—			(19,380		)	—			(19,216		)
Stock compensation expense	10,412			—			—			—			10,412
Equity in loss related to investments	—			26			—			—			26
Equity in (income) loss related to subsidiaries	(140,267		)	(134,346		)	(2,662		)	277,275			—
Gain on sales of investments	—			(1,109		)	(11,207		)	—			(12,316		)
Loss on sales of investments	—			195			1,412			—			1,607
Changes in operating assets and liabilities:
Restricted cash	(8		)	—			449			—			441
Tenant receivables	11			—			(2,648		)	—			(2,637		)
Deferred leasing costs	4,232			—			(27,829		)	—			(23,597		)
Other assets	2,603			—			(5,833		)	—			(3,230		)
Intercompany receivables and payables	(49		)	—			49			—			—
Accounts payable, accrued expenses, and tenant security deposits	3,592			—			37,786			—			41,378
Net cash provided by (used in) operating activities	(28,763		)	2			256,251			—			227,490
Investing Activities
Proceeds from sale of properties	—			—			36,179			—			36,179
Additions to properties	(1,192		)	—			(404,874		)	—			(406,066		)
Purchase of properties	—			—			(42,171		)	—			(42,171		)
Change in restricted cash related to construction projects	—			—			(11,453		)	—			(11,453		)
Distribution from unconsolidated real estate entity	—			—			22,250			—			22,250
Contributions to unconsolidated real estate entity	—			—			(5,042		)	—			(5,042		)
Investments in subsidiaries	(147,782		)	(112,504		)	(389		)	260,675			—
Additions to investments	—			(160		)	(21,837		)	—			(21,997		)
Proceeds from investments	—			1,944			17,961			—			19,905
Net cash provided by (used in) investing activities	$	(148,974	)	$	(110,720	)	$	(409,376	)	$	260,675		$	(408,395	)
Condensed Consolidating Statement of Cash Flows (continued)
for the Nine Months Ended September 30, 2012
(In thousands)
(Unaudited)
	Alexandria Real			Alexandria Real			Combined			Eliminations			Consolidated
	Estate Equities,			Estate Equities,			Non-Guarantor
	Inc. (Issuer)			L.P. (Guarantor			Subsidiaries
				Subsidiary)
Financing Activities
Borrowings from secured notes payable	$	—		$	—		$	2,874		$	—		$	2,874
Repayments of borrowings from secured notes payable	—			—			(8,125		)	—			(8,125		)
Proceeds from issuance of unsecured senior notes payable	549,533			—			—			—			549,533
Principal borrowings from unsecured senior line of credit and unsecured senior bank term loan	623,147			—			—			—			623,147
Repayments of borrowings from unsecured senior line of credit	(580,147		)	—			—			—			(580,147		)
Repayment of unsecured senior bank term loan	(250,000		)	—			—			—			(250,000		)
Repurchase of unsecured senior convertible notes	(84,801		)	—			—			—			(84,801		)
Redemption of Series C Cumulative Redeemable Preferred Stock	(129,638		)	—			—			—			(129,638		)
Proceeds from issuance of Series E Cumulative Redeemable Preferred Stock	124,868			—			—			—			124,868
Transfer to/from parent company	—			110,718			149,957			(260,675		)	—
Change in restricted cash related to financings	—			—			(10,476		)	—			(10,476		)
Deferred financing costs paid	(19,949		)	—			(5,352		)	—			(25,301		)
Proceeds from common stock offering	98,443			—			—			—			98,443
Proceeds from exercise of stock options	155			—			—			—			155
Dividends paid on common stock	(92,743		)	—			—			—			(92,743		)
Dividends paid on preferred stock	(21,348		)	—			—			—			(21,348		)
Distributions to redeemable noncontrolling interests	—			—			(943		)	—			(943		)
Redemption of redeemable noncontrolling interests	4			—			(154		)	—			(150		)
Contributions by noncontrolling interests	—			—			1,626			—			1,626
Distributions to noncontrolling interests	—			—			(770		)	—			(770		)
Net cash provided by (used in) financing activities	217,524			110,718			128,637			(260,675		)	196,204
Effect of foreign exchange rate changes on cash and cash equivalents	—			—			1,066			—			1,066
Net increase (decrease) in cash and cash equivalents	39,787			—			(23,422		)	—			16,365
Cash and cash equivalents at beginning of period	10,608			—			67,931			—			78,539
Cash and cash equivalents at end of period	$	50,395		$	—		$	44,509		$	—		$	94,904
Supplemental Disclosure of Cash Flow Information
Cash paid during the period for interest, net of interest capitalized	$	23,226		$	—		$	7,259		$	—		$	30,485
Non-Cash Investing Activities
Note receivable from sale of real estate	$	—		$	—		$	6,125		$	—		$	6,125

Basis_of_presentation_Policies

Basis of presentation (Policies)	9 Months Ended
	Sep. 30, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Basis of presentation	'
	We have prepared the accompanying interim consolidated financial statements in accordance with U.S. generally accepted accounting principles (“GAAP”) and in conformity with the rules and regulations of the Securities and Exchange Commission (“SEC”).  In our opinion, the interim consolidated financial statements presented herein reflect all adjustments that are necessary to fairly present the interim consolidated financial statements.  The results of operations for the interim period are not necessarily indicative of the results that may be expected for the year ending December 31, 2013.  These consolidated financial statements should be read in conjunction with the consolidated financial statements and the notes thereto included in our annual report on Form 10-K for the year ended December 31, 2012.
	The accompanying consolidated financial statements include the accounts of Alexandria Real Estate Equities, Inc. and its subsidiaries.  All significant intercompany balances and transactions have been eliminated.
	We hold interests, together with certain third parties, in companies that we consolidate in our financial statements.  We consolidate the companies because we exercise significant control over major decisions by these entities, such as investment activity and changes in financing.
Use of estimates	'
	Use of estimates
	The preparation of consolidated financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the reported amounts of assets, liabilities, and equity; the disclosure of contingent assets and liabilities as of the date of the consolidated financial statements; and the amounts of revenues and expenses during the reporting period.  Actual results could materially differ from those estimates.
Reclassifications	'
	Reclassifications
	Certain prior period amounts have been reclassified to conform to the current period presentation.
Investments in real estate, net, and discontinued operations	'
	Investments in real estate, net, and discontinued operations
	We recognize assets acquired (including the intangible value of above or below market leases, acquired in-place leases, client tenant relationships, and other intangible assets or liabilities), liabilities assumed, and any noncontrolling interest in an acquired entity at their fair value as of the acquisition date.  If there is a bargain fixed rate renewal option for the period beyond the non-cancelable lease term, we evaluate factors such as the business conditions in the industry in which the lessee operates, the economic conditions in the area in which the property is located, and the ability of the lessee to sublease the property during the renewal term, in order to determine the likelihood that the lessee will renew.  When we determine there is reasonable assurance that such bargain purchase option will be exercised, we consider its impact in determining the intangible value of such lease and its related amortization period.  The value of tangible assets acquired is based upon our estimation of value on an “as if vacant” basis.  The value of acquired in-place leases includes the estimated carrying costs during the hypothetical lease-up period and other costs that would have been incurred in the execution of similar leases, considering market conditions at the acquisition date of the acquired in-place lease.  We assess the fair value of tangible and intangible assets based on numerous factors, including estimated cash flow projections that utilize appropriate discount and capitalization rates and available market information.  Estimates of future cash flows are based on a number of factors, including the historical operating results, known trends, and market/economic conditions that may affect the property.  We also recognize the fair values of assets acquired, the liabilities assumed, and any noncontrolling interest in acquisitions of less than a 100% interest when the acquisition constitutes a change in control of the acquired entity.  Acquisition-related costs and restructuring costs are expensed as incurred.
	The values allocated to land improvements, tenant improvements, equipment, buildings, and building improvements are depreciated on a straight-line basis using an estimated life of 20 years for land improvements, the respective lease term for tenant improvements, the estimated useful life for equipment, and the shorter of the term of the respective ground lease and up to 40 years for buildings and building improvements.  The values of acquired above and below market leases are amortized over the lives of the related leases and recognized as either an increase (for below market leases) or a decrease (for above market leases) to rental income.  The values of acquired in-place leases are classified in other assets in the accompanying consolidated balance sheets, and amortized over the remaining terms of the related leases.
	We are required to capitalize project costs, including predevelopment costs, interest, property taxes, insurance, and other costs directly related and essential to the acquisition, development, redevelopment, or construction of a project.  Capitalization of development, redevelopment, and construction costs is required while activities are ongoing to prepare an asset for its intended use.  Fluctuations in our development, redevelopment, and construction activities could result in significant changes to total expenses and net income.  Costs incurred after a project is substantially complete and ready for its intended use are expensed as incurred.  Should development, redevelopment, or construction activity cease, interest, property taxes, insurance, and certain other costs would no longer be eligible for capitalization and would be expensed as incurred.  Expenditures for repairs and maintenance are expensed as incurred.
	A property is classified as “held for sale” when all of the following criteria for a plan of sale have been met: (1) management, having the authority to approve the action, commits to a plan to sell the property; (2) the property is available for immediate sale in its present condition, subject only to terms that are usual and customary; (3) an active program to locate a buyer and other actions required to complete the plan to sell have been initiated; (4) the sale of the property is probable and is expected to be completed within one year; (5) the property is being actively marketed for sale at a price that is reasonable in relation to its current fair value; and (6) actions necessary to complete the plan of sale indicate that it is unlikely that significant changes to the plan will be made or that the plan will be withdrawn.  When all of these criteria have been met, the property is classified as “held for sale.” If (1) the operations and cash flows of the property have been or will be eliminated from the ongoing operations; and (2) we will not have any significant continuing involvement in the operations of the property after the sale, then its operations, including any interest expense directly attributable to it, are classified as discontinued operations in our consolidated statements of income, and amounts for all prior periods presented are reclassified from continuing operations to discontinued operations.  Depreciation of assets ceases upon designation of a property as “held for sale.”
Impairment of long-lived assets	'
	Impairment of long-lived assets
	Long-lived assets to be held and used, including our rental properties, land held for future development, construction in progress, and intangibles, are individually evaluated for impairment when conditions exist that may indicate that the carrying amount of a long-lived asset may not be recoverable.  The carrying amount of a long-lived asset to be held and used is not recoverable if it exceeds the sum of the undiscounted cash flows expected to result from the use and eventual disposition of the asset.  Impairment indicators or triggering events for long-lived assets to be held and used, including our rental properties, land held for future development, and construction in progress, are assessed by project and include significant fluctuations in estimated net operating income, occupancy changes, significant near-term lease expirations, current and historical operating and/or cash flow losses, construction costs, estimated completion dates, rental rates, and other market factors.  We assess the expected undiscounted cash flows based upon numerous factors, including, but not limited to, construction costs, available market information, current and historical operating results, known trends, current market/economic conditions that may affect the property, and our assumptions about the use of the asset, including, if necessary, a probability-weighted approach if multiple outcomes are under consideration.  Upon determination that an impairment has occurred, a write-down is recognized to reduce the carrying amount to its estimated fair value.  If an impairment loss is not required to be recognized, the recognition of depreciation is adjusted prospectively, as necessary, to reduce the carrying amount of the real estate to its estimated disposition value over the remaining period that the real estate is expected to be held and used.  We may adjust depreciation of properties that are expected to be disposed of or redeveloped prior to the end of their useful lives.
	We use a “held for sale” impairment model for our properties classified as “held for sale.”  The “held for sale” impairment model is different from the held and used impairment model.  Under the “held for sale” impairment model, an impairment loss is recognized if the carrying amount of the long-lived asset classified as “held for sale” exceeds its fair value less cost to sell.  Because of these two different models, it is possible for a long-lived asset previously classified as held and used to require the recognition of an impairment charge upon classification as “held for sale.”
Investments	'
	Investments
	We hold equity investments in certain publicly traded companies and privately held entities primarily involved in the life science industry.  All of our investments in actively traded public companies are considered “available for sale” and are reflected in the accompanying consolidated balance sheets at fair value.  Fair value has been determined based upon the closing price as of each balance sheet date, with unrealized gains and losses shown as a separate component of comprehensive income.  The classification of each investment is determined at the time each investment is made, and such determination is reevaluated at each balance sheet date.  The cost of each investment sold is determined by the specific identification method, with net realized gains or losses classified in other income in the accompanying consolidated statements of income.  Investments in privately held entities are generally accounted for under the cost method when our interest in the entity is so minor that we have virtually no influence over the entity’s operating and financial policies.  Certain investments in privately held entities are accounted for under the equity method when our interest in the entity is not deemed so minor that we have virtually no influence over the entity’s operating and financial policies.  Under the equity method of accounting, we recognize our investment initially at cost and adjust the carrying amount of the investment to recognize our share of the earnings or losses of the investee subsequent to the date of our investment.  Additionally, we limit our ownership percentage in the voting stock of each individual entity to less than 10%.  As of September 30, 2013, and December 31, 2012, our ownership percentage in the voting stock of each individual entity was less than 10%.
	Individual investments are evaluated for impairment when changes in conditions may indicate an impairment exists.  The factors that we consider in making these assessments include market prices, market conditions, available financing, prospects for favorable or unfavorable clinical trial results, new product initiatives, and new collaborative agreements.  If there are no identified events or changes in circumstances that would have an adverse effect on our cost method investments, we do not estimate the investment’s fair value.  For all of our investments, if a decline in the fair value of an investment below the carrying value is determined to be other than temporary, such investment is written down to its estimated fair value with a non-cash charge to current earnings.
Income taxes	'
	Income taxes
	We are organized and qualify as a REIT pursuant to the Internal Revenue Code of 1986, as amended (the “Code”).  Under the Code, a REIT that distributes 100% of its REIT taxable income as a dividend to its shareholders each year and that meets certain other conditions is not subject to federal income taxes, but could be subject to certain state and local taxes.  We have distributed 100% or more of our taxable income.  Therefore, no provision for federal income taxes is required.  We file tax returns, including returns for our subsidiaries, with federal, state, and local jurisdictions, including jurisdictions located in the U.S., Canada, India, China, and other international locations.  Our tax returns are subject to examination in various jurisdictions for the calendar years 2008 through 2012.
	We recognize tax benefits of uncertain tax positions only if it is more likely than not that the tax position will be sustained, based solely on its technical merits, with the taxing authority having full knowledge of all relevant information.  The measurement of a tax benefit for an uncertain tax position that meets the “more likely than not” threshold is based on a cumulative probability model under which the largest amount of tax benefit recognized is the amount with a greater than 50% likelihood of being realized upon ultimate settlement with the taxing authority having full knowledge of all the relevant information.  As of September 30, 2013, there were no unrecognized tax benefits.  We do not anticipate a significant change to the total amount of unrecognized tax benefits within the next 12 months.
	Interest expense and penalties, if any, would be recognized in the first period during which the interest or penalty would begin accruing, according to the provisions of the relevant tax law at the applicable statutory rate of interest.
Interest income	'
	Interest income is classified in other income in the accompanying consolidated statements of income.
Recognition of rental income and tenant recoveries	'
	Recognition of rental income and tenant recoveries
	Rental income from leases is recognized on a straight-line basis over the respective lease terms.  We classify amounts currently recognized as income, and expected to be received in later years, as an asset in deferred rent in the accompanying consolidated balance sheets.  Amounts received currently, but recognized as income in future years, are classified in accounts payable, accrued expenses, and tenant security deposits in the accompanying consolidated balance sheets.  We commence recognition of rental income at the date the property is ready for its intended use and the client tenant takes possession of or controls the physical use of the property.
	Tenant recoveries related to reimbursement of real estate taxes, insurance, utilities, repairs and maintenance, and other operating expenses are recognized as revenue in the period during which the applicable expenses are incurred.
	Tenant receivables consist primarily of amounts due for contractual lease payments, reimbursements of common area maintenance expenses, property taxes, and other expenses recoverable from client tenants.  Tenant receivables are expected to be collected within one year.  We maintain an allowance for estimated losses that may result from the inability of our client tenants to make payments required under the terms of the lease and for tenant recoveries due.  If a client tenant fails to make contractual payments beyond any allowance, we may recognize additional bad debt expense in future periods equal to the amount of uncollectible rent and deferred rent receivables arising from the straight-lining of rent.

Investments_in_real_estate_Tab

Investments in real estate (Tables)	9 Months Ended
	Sep. 30, 2013
Real Estate [Abstract]	'
Investments in real estate	'
	Our investments in real estate, net, consisted of the following as of September 30, 2013, and December 31, 2012 (in thousands):
		30-Sep-13				31-Dec-12
	Rental properties:
	Land (related to rental properties)	$	542,511			$	522,664
	Buildings and building improvements	5,315,447				4,933,314
	Other improvements	170,078				189,793
	Rental properties	6,028,036				5,645,771
	Less: accumulated depreciation	(915,494		)		(875,035		)
	Rental properties, net	5,112,542				4,770,736
	Construction in progress (“CIP”)/current value-creation projects:
	Active development in North America	594,973				431,578
	Investment in unconsolidated joint venture	42,537			(1)	28,656
	Active redevelopment in North America	24,960				199,744
	Active development and redevelopment in Asia	97,319				101,602
	Generic infrastructure/building improvement projects in North America	46,227				80,599
		806,016				842,179
	Subtotal	5,918,558				5,612,915
	Land/future value-creation projects:
	Land undergoing predevelopment activities (CIP) in North America	351,062				433,310
	Land held for future development in North America	190,427				296,039
	Land held for future development/undergoing predevelopment activities (CIP) in Asia	77,274				82,314
	Land subject to sale negotiations	76,440				—
		695,203				811,663
	Investments in real estate, net	$	6,613,761			$	6,424,578
	-1	The book value for this unconsolidated joint venture represents our equity investment in the project.

Investments_Tables

Investments (Tables)	9 Months Ended
	Sep. 30, 2013
Investments [Abstract]	'
Summary of investments	'
	The following table summarizes our investments as of September 30, 2013, and December 31, 2012 (in thousands):
		30-Sep-13			31-Dec-12
	“Available-for-sale” securities, cost basis	$	1,940		$	1,236
	Gross unrealized gains	1,708			1,561
	Gross unrealized losses	(392		)	(88		)
	“Available-for-sale” securities, at fair value	3,256			2,709
	Investments accounted for under cost method	125,901			112,333
	Investments accounted for under equity method	6			6
	Total investments	$	129,163		$	115,048
Schedule of net investment income	'
	The following table outlines our investment income, which is classified in other income in the accompanying consolidated statements of income for the three and nine months ended September 30, 2013 (in thousands):
		Three Months Ended September 30,						Nine Months Ended
								September 30,
		2013			2012			2013			2012
	Gross realized gains	$	2,050		$	1,190		$	4,716		$	12,316
	Gross realized losses	—			(518		)	(529		)	(1,607		)
	Equity in loss related to equity method investments	—			—			—			(26		)
	Investment income	$	2,050		$	672		$	4,187		$	10,683
	Amount of gains reclassified from accumulated other comprehensive income to realized gains, net	$	250		$	1,421		$	480		$	2,107

Secured_and_unsecured_senior_d1

Secured and unsecured senior debt (Tables)	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]	'
Summary of secured and unsecured debt	'
	The following table summarizes our secured and unsecured senior debts and their respective principal maturities, as of September 30, 2013 (dollars in thousands):
		Fixed Rate/Hedged				Unhedged				Total				Percentage of Total			Weighted Average			Weighted Average
		Variable Rate				Variable Rate				Consolidated							Interest Rate at			Remaining Term
																	End of Period (1)			(in years)
	Secured notes payable, net	$	589,126			$	119,527			$	708,653			24.7	%		5.47	%		2.5
	Unsecured senior notes payable, net	1,048,190				—				1,048,190				36.5			4.29			9.1
	$1.5 billion unsecured senior line of credit	—				14,000				14,000				0.5			1.28			5.3
	2016 Unsecured Senior Bank Term Loan	350,000				150,000				500,000				17.4			1.7			2.8
	2019 Unsecured Senior Bank Term Loan	600,000				—				600,000				20.9			3.3			5.3
	Total debt / weighted average	$	2,587,316			$	283,527			$	2,870,843			100	%		3.91	%		5.5
	Percentage of total debt	90		%		10		%		100		%
	-1	Represents the weighted average contractual interest rate as of the end of the period plus the impact of debt premiums/discounts and our interest rate swap agreements. The weighted average interest rate excludes bank fees and amortization of loan fees.
Summary of fixed rate/hedged and unhedged floating rate debt and their respective principal maturities	'
	The following table summarizes our outstanding consolidated indebtedness as of September 30, 2013 (dollars in thousands):
			Stated			Weighted Average				Maturity Date(2)		Remaining for the Period Ending December 31,
	Debt		Rate			Interest Rate(1)						2013				2014				2015			2016			2017			Thereafter			Total
	Secured notes payable
	Greater Boston		5.26	%		5.59		%		4/1/14		$	979			$	208,683			$	—		$	—		$	—		$	—		$	209,662
	Suburban Washington, D.C.		2.17			2.17				4/20/14	(3)	—				76,000				—			—			—			—			76,000
	San Diego		6.05			4.88				7/1/14		24				6,458				—			—			—			—			6,482
	San Diego		5.39			4				11/1/14		30				7,495				—			—			—			—			7,525
	Seattle		6			6				11/18/14		60				240				—			—			—			—			300
	Suburban Washington, D.C.		5.64			4.5				6/1/15		22				138				5,788			—			—			—			5,948
	Greater Boston, San Diego, and Greater New York City		5.73			5.73				1/1/16		416				1,713				1,816			75,501			—			—			79,446
	Greater Boston, San Diego, and Greater NYC		5.82			5.82				4/1/16		221				931				988			29,389			—			—			31,529
	San Francisco Bay Area		6.35			6.35				8/1/16		580				2,487				2,652			126,715			—			—			132,434
	San Francisco Bay Area		L+1.50			1.69				7/1/15	(4)	—				—				43,227			—			—			—			43,227
	San Francisco Bay Area		L+1.40			1.59				6/1/16	(5)	—				—				—			—			—			—			—
	Greater Boston		L+1.35			1.54				8/23/17	(6)	—				—				—			—			—			—			—
	San Diego, Suburban Washington, D.C., and Seattle		7.75			7.75				4/1/20		345				1,453				1,570			1,696			1,832			108,469			115,365
	San Francisco Bay Area		6.5			6.5				6/1/37		—				17				18			19			20			773			847
	Average/Total		5.41	%		5.47						2,677				305,615				56,059			233,320			1,852			109,242			708,765
	$1.5 billion unsecured senior line of credit		L+1.10	%	(7)	1.28				1/3/19		—				—				—			—			—			14,000			14,000
	2016 Unsecured Senior Bank Term Loan		L+1.20	%		1.7				7/31/16		—				—				—			500,000			—			—			500,000
	2019 Unsecured Senior Bank Term Loan		L+1.20	%		3.3				1/3/19		—				—				—			—			—			600,000			600,000
	Unsecured senior notes payable		4.6	%		4.61				4/1/22		—				—				—			—			—			550,000			550,000
	Unsecured senior notes payable		3.9	%		3.94				6/15/23		—				—				—			—			—			500,000			500,000
	Average/Subtotal					3.91						2,677				305,615				56,059			733,320			1,852			1,773,242			2,872,765
	Unamortized discounts					—						(146		)		(199		)		(139		)	(177		)	(184		)	(1,077		)	(1,922		)
	Average/Total					3.91		%				$	2,531			$	305,416			$	55,920		$	733,143		$	1,668		$	1,772,165		$	2,870,843
	Balloon payments											$	—			$	297,080			$	48,955		$	730,029		$	—		$	1,768,352		$	2,844,416
	Principal amortization											2,531				8,336				6,965			3,114			1,668			3,813			26,427
	Total consolidated debt											$	2,531			$	305,416			$	55,920		$	733,143		$	1,668		$	1,772,165		$	2,870,843
	Fixed rate/hedged variable rate debt											$	2,471			$	229,176			$	12,693		$	583,143		$	1,668		$	1,758,165		$	2,587,316
	Unhedged variable rate debt											60				76,240				43,227			150,000			—			14,000			283,527
	Total consolidated debt											$	2,531			$	305,416			$	55,920		$	733,143		$	1,668		$	1,772,165		$	2,870,843
	-1	Represents the weighted average contractual interest rate as of the end of the period plus the impact of debt premiums/discounts and our interest rate swap agreements. The weighted average interest rate excludes bank fees and amortization of loan fees.
	-2	Includes any extension options that we control.
	-3	We are having discussions with the lender on an extension of the maturity date.
	-4	Secured construction loan with aggregate commitments of $55.0 million. We have two, one-year options to extend the stated maturity date to July 1, 2017, subject to certain conditions.
	-5	Secured construction loan with aggregate commitments of $33.0 million. We have two, one-year options to extend the stated maturity date to June 1, 2018, subject to certain conditions. As of September 30, 2013, we had not drawn on the loan.
	-6	Secured construction loan with aggregate commitments of $245.4 million. We have a one-year option to extend the stated maturity date to August 23, 2018, subject to certain conditions. As of September 30, 2013, we had not drawn on the loan.
	-7	In addition to the stated rate, the line of credit is subject to an annual facility fee of
Schedule of changes to long-term debt	'
	The maturity dates below reflect any available extension options that we control.
			Balance at 9/30/13				Maturity Date				Applicable Rate				Facility Fee
	Facility						Prior		Amended		Prior		Amended		Prior			Amended
	2016 Unsecured Senior Bank Term Loan		$	500	million		Jun-16		Jul-16		L +1.75%		L +1.20%		N/A			N/A
	2019 Unsecured Senior Bank Term Loan		$	600	million		Jan-17		Jan-19		L +1.50%		L +1.20%		N/A			N/A
	$1.5 billion unsecured senior line of credit		$	14	million		Apr-17		Jan-19		L +1.20%		L +1.10%		0.25	%		0.2	%
Schedule of interest expense incurred	'
	The following table outlines our interest expense for the three and nine months ended September 30, 2013 and 2012 (in thousands):
		Three Months Ended September 30,								Nine Months Ended September 30,
		2013				2012				2013				2012
	Gross interest	$	32,959			$	33,855			$	96,668			$	99,094
	Capitalized interest	(16,788		)		(16,763		)		(46,499		)		(47,854		)
	Interest expense	$	16,171			$	17,092			$	50,169			$	51,240
	Construction loan of unconsolidated joint venture
	We have a 27.5% interest in an unconsolidated joint venture that is currently developing a building in the Longwood Medical Area of the Greater Boston market, with the construction costs funded primarily from a non-recourse secured construction loan with aggregate commitments of $213.2 million and an outstanding balance of $75.0 million as of September 30, 2013. See Note 3 for further information.

Interest_rate_swap_agreements_1

Interest rate swap agreements (Tables)	9 Months Ended
	Sep. 30, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Outstanding interest rate hedge agreements designated as cash flow hedges of interest rate risk	'
	We had the following outstanding interest rate swap agreements that were designated as cash flow hedges of interest rate risk as of September 30, 2013 (dollars in thousands):
				Interest Pay Rate (1)		Fair Value as of September 30, 2013			Notional Amount in Effect as of
	Effective Date		Termination Date						30-Sep-13		31-Dec-13
	29-Dec-06		31-Mar-14	4.99	%	$	(1,205	)	$	50,000	$	50,000
	30-Nov-09		31-Mar-14	5.015	%	(1,817		)	75,000		75,000
	30-Nov-09		31-Mar-14	5.023	%	(1,820		)	75,000		75,000
	31-Dec-12		31-Dec-13	0.64	%	(291		)	250,000		—
	31-Dec-12		31-Dec-13	0.64	%	(291		)	250,000		—
	31-Dec-12		31-Dec-13	0.644	%	(147		)	125,000		—
	31-Dec-12		31-Dec-13	0.644	%	(147		)	125,000		—
	31-Dec-13		31-Dec-14	0.977	%	(1,802		)	—		250,000
	31-Dec-13		31-Dec-14	0.976	%	(1,799		)	—		250,000
	Total					$	(9,319	)	$	950,000	$	700,000
	-1	In addition to the interest pay rate, borrowings outstanding under our unsecured senior bank term loans include an applicable margin of 1.20% as of September 30, 2013.

Fair_value_measurements_Tables

Fair value measurements (Tables)	9 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Schedule of fair value of assets and liabilities measured at fair value on a recurring basis by level within the fair value hierarchy	'
	The following tables set forth the assets and liabilities that we measure at fair value on a recurring basis by level within the fair value hierarchy as of September 30, 2013, and December 31, 2012 (in thousands):
						30-Sep-13
	Description		Total			Quoted Prices in			Significant			Significant
						Active Markets			Other			Unobservable
						for Identical			Observable			Inputs
						Assets			Inputs
	Assets:
	Marketable securities		$	3,256		$	3,256		$	—		$	—
	Liabilities:
	Interest rate swap agreements		$	9,319		$	—		$	9,319		$	—
						31-Dec-12
	Description		Total			Quoted Prices in			Significant			Significant
						Active Markets			Other			Unobservable
						for Identical			Observable			Inputs
						Assets			Inputs
	Assets:
	Marketable securities		$	2,709		$	2,709		$	—		$	—
	Liabilities:
	Interest rate swap agreements		$	20,661		$	—		$	20,661		$	—
Schedule of the book and fair values of our marketable securities, interest rate swap agreements, secured notes payable, unsecured senior notes payable, unsecured senior line of credit, and unsecured senior bank term loan	'
	As of September 30, 2013, and December 31, 2012, the book and fair values of our marketable securities, interest rate swap agreements, secured notes payable, unsecured senior notes payable, unsecured senior line of credit, and unsecured senior bank term loans were as follows (in thousands):
		30-Sep-13						31-Dec-12
		Book Value			Fair Value			Book Value			Fair Value
	Assets:
	Marketable securities	$	3,256		$	3,256		$	2,709		$	2,709
	Liabilities:
	Interest rate swap agreements	$	9,319		$	9,319		$	20,661		$	20,661
	Secured notes payable	$	708,653		$	761,047		$	716,144		$	788,455
	Unsecured senior notes payable	$	1,048,190		$	1,028,750		$	549,805		$	593,350
	Unsecured senior line of credit	$	14,000		$	13,738		$	566,000		$	567,196
	Unsecured senior bank term loans	$	1,100,000		$	1,088,322		$	1,350,000		$	1,405,124

Earnings_per_share_Tables

Earnings per share (Tables)	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Reconciliation of the numerators and denominators of the basic and diluted earnings per share computations	'
	The table below is a reconciliation of the numerators and denominators of the basic and diluted earnings per share computations for the three and nine months ended September 30, 2013 and 2012 (in thousands, except per share amounts):
		Three Months Ended September 30,						Nine Months Ended September 30,
		2013			2012			2013			2012
	Income from continuing operations	$	32,517		$	22,501		$	94,262		$	69,695
	Gain on sale of land parcel	—			—			772			1,864
	Net income attributable to noncontrolling interests	(960		)	(828		)	(2,922		)	(2,390		)
	Dividends on preferred stock	(6,472		)	(6,471		)	(19,414		)	(20,857		)
	Preferred stock redemption charge	—			—			—			(5,978		)
	Net income attributable to unvested restricted stock awards	(442		)	(360		)	(1,187		)	(866		)
	Income from continuing operations attributable to Alexandria’s common stockholders – basic and diluted	24,643			14,842			71,511			41,468
	(Loss) income from discontinued operations, net	(64		)	(4,196		)	993			5,162
	Net income attributable to Alexandria’s common stockholders – basic and diluted	$	24,579		$	10,646		$	72,504		$	46,630
	Weighted average shares of common stock outstanding – basic and diluted	70,900			62,364			67,040			61,847
	Earnings per share attributable to Alexandria’s common stockholders – basic and diluted:
	Continuing operations	$	0.35		$	0.24		$	1.07		$	0.67
	Discontinued operations, net	—			(0.07		)	0.01			0.08
	Earnings per share – basic and diluted	$	0.35		$	0.17		$	1.08		$	0.75

Net_income_attributable_to_Ale1

Net income attributable to Alexandria Real Estate Equities, Inc. (Tables)	9 Months Ended
	Sep. 30, 2013
Net Income (Loss) Attributable to Parent [Abstract]	'
Net income (loss) attributable to Alexandria Real Estate Equities, Inc.	'
	The following table shows income from continuing and discontinued operations attributable to Alexandria Real Estate Equities, Inc. for the three and nine months ended September 30, 2013 and 2012 (in thousands):
		Three Months Ended September 30,						Nine Months Ended September 30,
		2013			2012			2013			2012
	Income from continuing operations	$	32,517		$	22,501		$	94,262		$	69,695
	Gain on sale of land parcels	—			—			772			1,864
	Less: net income attributable to noncontrolling interests	(960		)	(828		)	(2,922		)	(2,390		)
	Income from continuing operations attributable to Alexandria	31,557			21,673			92,112			69,169
	(Loss) income from discontinued operations, net	(64		)	(4,196		)	993			5,162
	Less: net income from discontinued operations attributable to noncontrolling interests	—			—			—			—
	Net income attributable to Alexandria	$	31,493		$	17,477		$	93,105		$	74,331

Stockholders_equity_Tables

Stockholders' equity (Tables)	9 Months Ended
	Sep. 30, 2013
Stockholders' Equity Note [Abstract]	'
Accumulated other comprehensive loss attributable to Alexandria Real Estate Equities, Inc.	'
	Accumulated other comprehensive loss attributable to Alexandria consists of the following (in thousands):
		Unrealized Gain on Marketable Securities			Unrealized Loss on Interest Rate			Unrealized Loss on Foreign Currency Translation			Total
					Swap Agreements
	Balance as of December 31, 2012	$	1,473		$	(20,661	)	$	(5,645	)	$	(24,833	)
	Other comprehensive income (loss) before reclassifications	323			(704		)	(26,378		)	(26,759		)
	Amounts reclassified from other comprehensive income	(480		)	12,046			—			11,566
	Net other comprehensive (loss) income	(157		)	11,342			(26,378		)	(15,193		)
	Balance as of September 30, 2013	$	1,316		$	(9,319	)	$	(32,023	)	$	(40,026	)

Discontinued_operations_Tables

Discontinued operations (Tables)	9 Months Ended
	Sep. 30, 2013
Discontinued Operations and Disposal Groups [Abstract]	'
Summary of net assets of discontinued operations and income from discontinued operations, net	'
	The following is a summary of net assets of discontinued operations and income from discontinued operations, net (in thousands):
		30-Sep-13				31-Dec-12
	Properties “held for sale,” net	$	4,510			$	76,440
	Other assets	14				4,546
	Total assets	4,524				80,986
	Total liabilities	(32		)		(3,233		)
	Net assets of discontinued operations	$	4,492			$	77,753
			Three Months Ended September 30,							Nine Months Ended September 30,
			2013				2012			2013		2012
	Total revenues		$	4			$	8,418		$	3,741	$	26,556
	Operating expenses		68				2,788			1,697		8,337
	Total revenues less operating expenses from discontinued operations		(64		)		5,630			2,044		18,219
	Depreciation expense		—				1,589			930		4,822
	(Gain) loss on sale of real estate		—				(1,562		)	121		(1,564		)
	Impairment of real estate		—				9,799			—		9,799
	(Loss) income from discontinued operations, net (1)		$	(64	)		$	(4,196	)	$	993	$	5,162
	-1	(Loss) income from discontinued operations, net, includes the results of operations for two operating properties that were classified as “held for sale” as of September 30, 2013, as well as the results of operations (prior to disposition) and (gain) loss on sale of real estate attributable to 10 properties sold during the period from January 1, 2012, to September 30, 2013.

Condensed_consolidating_financ1

Condensed consolidating financial information (Tables)	9 Months Ended
	Sep. 30, 2013
Condensed consolidating financial information	'
Condensed Consolidating Balance Sheet	'
	Consolidating Balance Sheet
	as of September 30, 2013
	(In thousands)
	(Unaudited)
		Alexandria Real Estate Equities, Inc.			Alexandria			Combined			Eliminations			Consolidated
		(Issuer)			Real Estate			Non-
					Equities, L.P.			Guarantor
					(Guarantor			Subsidiaries
					Subsidiary)
	Assets
	Investments in real estate, net	$	—		$	—		$	6,613,761		$	—		$	6,613,761
	Cash and cash equivalents	14,667			—			39,172			—			53,839
	Restricted cash	61			—			30,593			—			30,654
	Tenant receivables	—			—			8,671			—			8,671
	Deferred rent	—			—			182,909			—			182,909
	Deferred leasing and financing costs, net	38,462			—			141,343			—			179,805
	Investments	—			11,828			117,335			—			129,163
	Investments in and advances to affiliates	6,119,819			5,655,063			116,004			(11,890,886		)	—
	Other assets	17,801			—			141,766			—			159,567
	Total assets	$	6,190,810		$	5,666,891		$	7,391,554		$	(11,890,886	)	$	7,358,369
	Liabilities, Noncontrolling Interests, and Equity
	Secured notes payable	$	—		$	—		$	708,653		$	—		$	708,653
	Unsecured senior notes payable	1,048,190			—			—			—			1,048,190
	Unsecured senior line of credit	14,000			—			—			—			14,000
	Unsecured senior bank term loans	1,100,000			—			—			—			1,100,000
	Accounts payable, accrued expenses, and tenant security deposits	55,467			—			396,672			—			452,139
	Dividends payable	54,125			—			288			—			54,413
	Total liabilities	2,271,782			—			1,105,613			—			3,377,395
	Redeemable noncontrolling interests	—			—			14,475			—			14,475
	Alexandria’s stockholders’ equity	3,919,028			5,666,891			6,223,995			(11,890,886		)	3,919,028
	Noncontrolling interests	—			—			47,471			—			47,471
	Total equity	3,919,028			5,666,891			6,271,466			(11,890,886		)	3,966,499
	Total liabilities, noncontrolling interests, and equity	$	6,190,810		$	5,666,891		$	7,391,554		$	(11,890,886	)	$	7,358,369
	Condensed Consolidating Balance Sheet
	as of December 31, 2012
	(In thousands)
	(Unaudited)
		Alexandria			Alexandria			Combined			Eliminations			Consolidated
		Real Estate			Real Estate			Non-
		Equities, Inc.			Equities, L.P.			Guarantor
		(Issuer)			(Guarantor			Subsidiaries
					Subsidiary)
	Assets
	Investments in real estate, net	$	38,616		$	—		$	6,385,962		$	—		$	6,424,578
	Cash and cash equivalents	98,567			1,913			40,491			—			140,971
	Restricted cash	52			—			39,895			—			39,947
	Tenant receivables	1			—			8,448			—			8,449
	Deferred rent	1,876			—			168,520			—			170,396
	Deferred leasing and financing costs, net	31,373			—			128,675			—			160,048
	Investments	—			12,591			102,457			—			115,048
	Investments in and advances to affiliates	5,833,368			5,358,883			110,100			(11,302,351		)	—
	Intercompany note receivable	3,021			—			—			(3,021		)	—
	Other assets	17,613			—			73,066			—			90,679
	Total assets	$	6,024,487		$	5,373,387		$	7,057,614		$	(11,305,372	)	$	7,150,116
	Liabilities, Noncontrolling Interests, and Equity
	Secured notes payable	$	—		$	—		$	716,144		$	—		$	716,144
	Unsecured senior notes payable	549,805			—			—			—			549,805
	Unsecured senior line of credit	566,000			—			—			—			566,000
	Unsecured senior bank term loans	1,350,000			—			—			—			1,350,000
	Accounts payable, accrued expenses, and tenant security deposits	75,728			—			347,980			—			423,708
	Dividends payable	41,103			—			298			—			41,401
	Intercompany notes payable	—			—			3,021			(3,021		)	—
	Total liabilities	2,582,636			—			1,067,443			(3,021		)	3,647,058
Redeemable noncontrolling interests	—			—			14,564			—			14,564
Alexandria’s stockholders’ equity	3,441,851			5,373,387			5,928,964			(11,302,351		)	3,441,851
Noncontrolling interests	—			—			46,643			—			46,643
Total equity	3,441,851			5,373,387			5,975,607			(11,302,351		)	3,488,494
Total liabilities, noncontrolling interests, and equity	$	6,024,487		$	5,373,387		$	7,057,614		$	(11,305,372	)	$	7,150,116
Condensed Consolidating Statements of Income	'
	Condensed Consolidating Statement of Income
	for the Three Months Ended September 30, 2013
	(In thousands)
	(Unaudited)
		Alexandria			Alexandria			Combined			Eliminations			Consolidated
		Real Estate			Real Estate			Non-
		Equities, Inc.			Equities, L.P.			Guarantor
		(Issuer)			(Guarantor			Subsidiaries
					Subsidiary)
	Revenues:
	Rental	$	—		$	—		$	116,302		$	—		$	116,302
	Tenant recoveries	—			—			38,757			—			38,757
	Other income	2,802			(1		)	3,965			(3,195		)	3,571
	Total revenues	2,802			(1		)	159,024			(3,195		)	158,630
	Expenses:
	Rental operations	—			—			47,742			—			47,742
	General and administrative	10,141			—			4,720			(3,195		)	11,666
	Interest	10,238			—			5,933			—			16,171
	Depreciation and amortization	1,472			—			47,630			—			49,102
	Loss on early extinguishment of debt	1,432			—			—			—			1,432
	Total expenses	23,283			—			106,025			(3,195		)	126,113
	Income (loss) from continuing operations before equity in earnings of affiliates	(20,481		)	(1		)	52,999			—			32,517
	Equity in earnings of affiliates	51,975			48,477			959			(101,411		)	—
	Income from continuing operations	31,494			48,476			53,958			(101,411		)	32,517
	(Loss) income from discontinued operations, net	(1		)	—			(63		)	—			(64		)
	Net income	31,493			48,476			53,895			(101,411		)	32,453
	Net income attributable to noncontrolling interests	—			—			960			—			960
	Dividends on preferred stock	6,472			—			—			—			6,472
	Net income attributable to unvested restricted stock awards	442			—			—			—			442
	Net income attributable to Alexandria’s common stockholders	$	24,579		$	48,476		$	52,935		$	(101,411	)	$	24,579
	Condensed Consolidating Statement of Income
	for the Three Months Ended September 30, 2012
	(In thousands)
	(Unaudited)
		Alexandria			Alexandria			Combined			Eliminations			Consolidated
		Real Estate			Real Estate			Non-
		Equities, Inc.			Equities, L.P.			Guarantor
		(Issuer)			(Guarantor			Subsidiaries
					Subsidiary)
	Revenues:
	Rental	$	—		$	—		$	106,216		$	—		$	106,216
	Tenant recoveries	—			—			34,006			—			34,006
	Other income	2,785			51			3,209			(3,417		)	2,628
	Total revenues	2,785			51			143,431			(3,417		)	142,850
	Expenses:
	Rental operations	—			—			44,203			—			44,203
	General and administrative	9,587			—			6,300			(3,417		)	12,470
	Interest	11,785			—			5,307			—			17,092
	Depreciation and amortization	1,725			—			44,859			—			46,584
	Total expenses	23,097			—			100,669			(3,417		)	120,349
	Income (loss) from continuing operations before equity in earnings of affiliates	(20,312		)	51			42,762			—			22,501
	Equity in earnings of affiliates	41,380			42,064			804			(84,248		)	—
	Income from continuing operations	21,068			42,115			43,566			(84,248		)	22,501
	(Loss) income from discontinued operations, net	(3,591		)	—			(605		)	—			(4,196		)
	Net income	17,477			42,115			42,961			(84,248		)	18,305
	Net income attributable to noncontrolling interests	—			—			828			—			828
	Dividends on preferred stock	6,471			—			—			—			6,471
	Net income attributable to unvested restricted stock awards	360			—			—			—			360
	Net income attributable to Alexandria’s common stockholders	$	10,646		$	42,115		$	42,133		$	(84,248	)	$	10,646
	Condensed Consolidating Statement of Income
	for the Nine Months Ended September 30, 2013
	(In thousands)
	(Unaudited)
	Alexandria			Alexandria			Combined			Eliminations			Consolidated
	Real Estate			Real Estate			Non-
	Equities, Inc.			Equities, L.P.			Guarantor
	(Issuer)			(Guarantor			Subsidiaries
				Subsidiary)
Revenues:
Rental	$	—		$	—		$	342,821		$	—		$	342,821
Tenant recoveries	—			—			110,291			—			110,291
Other income	8,071			(142		)	11,636			(9,432		)	10,133
Total revenues	8,071			(142		)	464,748			(9,432		)	463,245
Expenses:
Rental operations	—			—			139,289			—			139,289
General and administrative	32,574			—			12,644			(9,432		)	35,786
Interest	32,048			—			18,121			—			50,169
Depreciation and amortization	4,393			—			137,354			—			141,747
Loss on early extinguishment of debt	1,992			—			—			—			1,992
Total expenses	71,007			—			307,408			(9,432		)	368,983
Income (loss) from continuing operations before equity in earnings of affiliates	(62,936		)	(142		)	157,340			—			94,262
Equity in earnings of affiliates	155,694			144,660			2,858			(303,212		)	—
Income from continuing operations	92,758			144,518			160,198			(303,212		)	94,262
Income from discontinued operations, net	347			—			646			—			993
Gain on sale of land parcel	—			—			772			—			772
Net income	93,105			144,518			161,616			(303,212		)	96,027
Net income attributable to noncontrolling interests	—			—			2,922			—			2,922
Dividends on preferred stock	19,414			—			—			—			19,414
Net income attributable to unvested restricted stock awards	1,187			—			—			—			1,187
Net income attributable to Alexandria’s common stockholders	$	72,504		$	144,518		$	158,694		$	(303,212	)	$	72,504
Condensed Consolidating Statement of Income
for the Nine Months Ended September 30, 2012
(In thousands)
(Unaudited)
	Alexandria			Alexandria			Combined			Eliminations			Consolidated
	Real Estate			Real Estate			Non-
	Equities, Inc.			Equities, L.P.			Guarantor
	(Issuer)			(Guarantor			Subsidiaries
				Subsidiary)
Revenues:
Rental	$	—		$	—		$	311,746		$	—		$	311,746
Tenant recoveries	—			—			97,769			—			97,769
Other income	7,593			891			16,095			(9,940		)	14,639
Total revenues	7,593			891			425,610			(9,940		)	424,154
Expenses:
Rental operations	—			—			126,758			—			126,758
General and administrative	32,030			1			13,034			(9,940		)	35,125
Interest	34,460			—			16,780			—			51,240
Depreciation and amortization	3,781			—			135,330			—			139,111
Loss on early extinguishment of debt	2,225			—			—			—			2,225
Total expenses	72,496			1			291,902			(9,940		)	354,459
Income (loss) from continuing operations before equity in earnings of affiliates	(64,903		)	890			133,708			—			69,695
Equity in earnings of affiliates	140,267			134,346			2,662			(277,275		)	—
Income from continuing operations	75,364			135,236			136,370			(277,275		)	69,695
Income (loss) from discontinued operations, net	(1,033		)	—			6,195			—			5,162
Gain on sale of land parcel	—			—			1,864			—			1,864
Net income	74,331			135,236			144,429			(277,275		)	76,721
Net income attributable to noncontrolling interests	—			—			2,390			—			2,390
Dividends on preferred stock	20,857			—			—			—			20,857
Preferred stock redemption charge	5,978			—			—			—			5,978
Net income attributable to unvested restricted stock awards	866			—			—			—			866
Net income attributable to Alexandria’s common stockholders	$	46,630		$	135,236		$	142,039		$	(277,275	)	$	46,630
Condensed Consolidating Statement Comprehensive Income	'
	Condensed Consolidating Statement of Comprehensive Income
	for the Three Months Ended September 30, 2013
	(In thousands)
	(Unaudited)
		Alexandria			Alexandria			Combined			Eliminations			Consolidated
		Real Estate			Real Estate			Non-
		Equities, Inc.			Equities, L.P.			Guarantor
		(Issuer)			(Guarantor			Subsidiaries
					Subsidiary)
	Net income	$	31,493		$	48,476		$	53,895		$	(101,411	)	$	32,453
	Other comprehensive income:
	Unrealized gains (losses) on marketable securities:
	Unrealized holding gains (losses) arising during the period	—			(796		)	759			—			(37		)
	Reclassification adjustment for (gains) losses included in net income	—			519			(769		)	—			(250		)
	Unrealized gains (losses) on marketable securities, net	—			(277		)	(10		)	—			(287		)
	Unrealized gains on interest rate swaps:
	Unrealized interest rate swap gains arising during the period	(676		)	—			—			—			(676		)
	Reclassification adjustment for amortization of interest expense included in net income	3,904			—			—			—			3,904
	Unrealized gains on interest rate swaps, net	3,228			—			—			—			3,228
	Foreign currency translation losses	—			—			(3,404		)	—			(3,404		)
	Total other comprehensive income (loss)	3,228			(277		)	(3,414		)	—			(463		)
	Comprehensive income	34,721			48,199			50,481			(101,411		)	31,990
	Less: comprehensive income attributable to noncontrolling interests	—			—			(933		)	—			(933		)
	Comprehensive income attributable to Alexandria’s common stockholders	$	34,721		$	48,199		$	49,548		$	(101,411	)	$	31,057
	Condensed Consolidating Statement of Comprehensive Income
	for the Three Months Ended September 30, 2012
	(In thousands)
	(Unaudited)
		Alexandria			Alexandria			Combined			Eliminations			Consolidated
		Real Estate			Real Estate			Non-
		Equities, Inc.			Equities, L.P.			Guarantor
		(Issuer)			(Guarantor			Subsidiaries
					Subsidiary)
	Net income	$	17,477		$	42,115		$	42,961		$	(84,248	)	$	18,305
	Other comprehensive income:
	Unrealized gains (losses) on marketable securities:
	Unrealized holding gains (losses) arising during the period	—			23			773			—			796
	Reclassification adjustment for losses included in net income	—			(11		)	(1,410		)	—			(1,421		)
	Unrealized gains (losses) on marketable securities, net	—			12			(637		)	—			(625		)
	Unrealized gains (losses) on interest rate swaps:
	Unrealized interest rate swap gains (losses) arising during the period	(2,818		)	—			—			—			(2,818		)
	Reclassification adjustment for amortization of interest expense included in net income	5,956			—			—			—			5,956
	Unrealized gains (losses) on interest rate swaps, net	3,138			—			—			—			3,138
	Foreign currency translation losses	—			—			15,104			—			15,104
	Total other comprehensive income	3,138			12			14,467			—			17,617
	Comprehensive income	20,615			42,127			57,428			(84,248		)	35,922
	Less: comprehensive income attributable to noncontrolling interests	—			—			(805		)	—			(805		)
	Comprehensive income attributable to Alexandria’s common stockholders	$	20,615		$	42,127		$	56,623		$	(84,248	)	$	35,117
	Condensed Consolidating Statement of Comprehensive Income
	for the Nine Months Ended September 30, 2013
	(In thousands)
	(Unaudited)
		Alexandria			Alexandria			Combined			Eliminations			Consolidated
		Real Estate			Real Estate			Non-
		Equities, Inc.			Equities, L.P.			Guarantor
		(Issuer)			(Guarantor			Subsidiaries
					Subsidiary)
	Net income	$	93,105		$	144,518		$	161,616		$	(303,212	)	$	96,027
	Other comprehensive income:
	Unrealized gains on marketable securities:
	Unrealized holding gains (losses) arising during the period	—			(391		)	714			—			323
	Reclassification adjustment for (gains) losses included in net income	—			144			(624		)	—			(480		)
	Unrealized gains on marketable securities, net	—			(247		)	90			—			(157		)
Unrealized gains on interest rate swaps:
Unrealized interest rate swap losses arising during the period	(704		)	—			—			—			(704		)
Reclassification adjustment for amortization of interest expense included in net income	12,046			—			—			—			12,046
Unrealized gains on interest rate swaps, net	11,342			—			—			—			11,342
Foreign currency translation losses	—			—			(26,461		)	—			(26,461		)
Total other comprehensive income	11,342			(247		)	(26,371		)	—			(15,276		)
Comprehensive income	104,447			144,271			135,245			(303,212		)	80,751
Less: comprehensive income attributable to noncontrolling interests	—			—			(2,839		)	—			(2,839		)
Comprehensive income attributable to Alexandria's common stockholders	$	104,447		$	144,271		$	132,406		$	(303,212	)	$	77,912
Condensed Consolidating Statement of Comprehensive Income
for the Nine Months Ended September 30, 2012
(In thousands)
(Unaudited)
	Alexandria			Alexandria			Combined			Eliminations			Consolidated
	Real Estate			Real Estate			Non-
	Equities, Inc.			Equities, L.P.			Guarantor
	(Issuer)			(Guarantor			Subsidiaries
				Subsidiary)
Net income	$	74,331		$	135,236		$	144,429		$	(277,275	)	$	76,721
Other comprehensive income:
Unrealized gains (losses) on marketable securities:
Unrealized holding gains arising during the period	—			10			1,353			—			1,363
Reclassification adjustment for (gains) losses included in net income	—			172			(2,279		)	—			(2,107		)
Unrealized gains (losses) on marketable securities, net	—			182			(926		)	—			(744		)
Unrealized gains on interest rate swaps:
Unrealized interest rate swap losses arising during the period	(9,982		)	—			—			—			(9,982		)
Reclassification adjustment for amortization of interest expense included in net income	17,626			—			—			—			17,626
Unrealized gains on interest rate swaps, net	7,644			—			—			—			7,644
Foreign currency translation losses	—			—			7,871			—			7,871
Total other comprehensive income	7,644			182			6,945			—			14,771
Comprehensive income	81,975			135,418			151,374			(277,275		)	91,492
Less: comprehensive income attributable to noncontrolling interests	—			—			(2,379		)	—			(2,379		)
Comprehensive income attributable to Alexandria’s common stockholders	$	81,975		$	135,418		$	148,995		$	(277,275	)	$	89,113
Condensed Consolidating Statement Cash Flows	'
	Condensed Consolidating Statement of Cash Flows
	for the Nine Months Ended September 30, 2013
	(In thousands)
	(Unaudited)
		Alexandria Real			Alexandria Real			Combined			Eliminations			Consolidated
		Estate Equities,			Estate Equities,			Non-Guarantor
		Inc. (Issuer)			L.P. (Guarantor			Subsidiaries
					Subsidiary)
	Operating Activities
	Net income	$	93,105		$	144,518		$	161,616		$	(303,212	)	$	96,027
	Adjustments to reconcile net income to net cash provided by operating activities:
	Depreciation and amortization	4,393			—			138,284			—			142,677
	Loss on early extinguishment of debt	1,992			—			—			—			1,992
	Gain on sale of land parcel	—			—			(772		)	—			(772		)
	Loss on sale of real estate	—			—			121			—			121
	Amortization of loan fees and costs	5,148			—			2,152			—			7,300
	Amortization of debt premiums/discounts	75			—			308			—			383
	Amortization of acquired above and below market leases	—			—			(2,490		)	—			(2,490		)
	Deferred rent	—			—			(20,007		)	—			(20,007		)
	Stock compensation expense	11,541			—			—			—			11,541
	Equity in (income) loss related to subsidiaries	(155,694		)	(144,660		)	(2,858		)	303,212			—
	Gain on sales of investments	—			(152		)	(4,564		)	—			(4,716		)
	Loss on sales of investments	—			298			231			—			529
	Changes in operating assets and liabilities:
	Restricted cash	(8		)	—			1,251			—			1,243
	Tenant receivables	1			—			(272		)	—			(271		)
	Deferred leasing costs	2,421			—			(39,611		)	—			(37,190		)
	Other assets	(5,570		)	—			(5,858		)	—			(11,428		)
	Intercompany receivables and payables	3,021			—			(3,021		)	—			—
	Accounts payable, accrued expenses, and tenant security deposits	(9,599		)	—			61,036			—			51,437
	Net cash provided by (used in) operating activities	(49,174		)	4			285,546			—			236,376
	Investing Activities
	Proceeds from sale of properties	10,796			—			91,019			—			101,815
	Additions to properties	3,539			—			(453,679		)	—			(450,140		)
	Purchase of properties	—			—			(24,537		)	—			(24,537		)
	Change in restricted cash related to construction projects	—			—			5,711			—			5,711
	Contributions to unconsolidated real estate entity	—			—			(13,881		)	—			(13,881		)
	Investments in subsidiaries	(126,967		)	(170,033		)	(3,045		)	300,045			—
	Additions to investments	—			—			(22,835		)	—			(22,835		)
	Proceeds from investments	—			1,594			11,156			—			12,750
	Net cash provided by (used in) investing activities	$	(112,632	)	$	(168,439	)	$	(410,091	)	$	300,045		$	(391,117	)
	Condensed Consolidating Statement of Cash Flows (continued)
	for the Nine Months Ended September 30, 2013
	(In thousands)
	(Unaudited)
		Alexandria Real			Alexandria Real			Combined			Eliminations			Consolidated
		Estate Equities,			Estate Equities,			Non-Guarantor
		Inc. (Issuer)			L.P. (Guarantor			Subsidiaries
					Subsidiary)
	Financing Activities
	Borrowings from secured notes payable	$	—		$	—		$	26,319		$	—		$	26,319
	Repayments of borrowings from secured notes payable	—			—			(34,120		)	—			(34,120		)
	Proceeds from issuance of senior notes payable	498,561			—			—			—			498,561
	Principal borrowings from unsecured senior line of credit	319,000			—			—			—			319,000
	Repayments of borrowings from unsecured senior line of credit	(871,000		)	—			—			—			(871,000		)
	Repayments of unsecured senior bank term loans	(250,000		)	—			—			—			(250,000		)
	Repurchase of unsecured senior convertible notes	(384		)	—			—			—			(384		)
	Transfer to/from parent company	—			166,522			133,523			(300,045		)	—
	Change in restricted cash related to financings	(1		)	—			924			—			923
	Deferred financing costs paid	(14,175		)	—			(2,072		)	—			(16,247		)
	Proceeds from common stock offerings	535,686			—			—			—			535,686
	Dividends paid on common stock	(120,367		)	—			—			—			(120,367		)
	Dividends paid on preferred stock	(19,414		)	—			—			—			(19,414		)
Distributions to noncontrolling interests	—			—			(2,100		)	—			(2,100		)
Net cash provided by (used in) financing activities	77,906			166,522			122,474			(300,045		)	66,857
Effect of foreign exchange rate changes on cash and cash equivalents	—			—			752			—			752
Net increase (decrease) in cash and cash equivalents	(83,900		)	(1,913		)	(1,319		)	—			(87,132		)
Cash and cash equivalents at beginning of period	98,567			1,913			40,491			—			140,971
Cash and cash equivalents at end of period	$	14,667		$	—		$	39,172		$	—		$	53,839
Supplemental Disclosure of Cash Flow Information
Cash paid during the period for interest, net of interest capitalized	$	16,569		$	—		$	17,712		$	—		$	34,281
Non-Cash Investing Activities
Note receivable from sale of real estate	$	29,820		$	—		$	9,000		$	—		$	38,820
Condensed Consolidating Statement of Cash Flows
for the Nine Months Ended September 30, 2012
(In thousands)
(Unaudited)
	Alexandria Real			Alexandria Real			Combined			Eliminations			Consolidated
	Estate Equities,			Estate Equities,			Non-Guarantor
	Inc. (Issuer)			L.P. (Guarantor			Subsidiaries
				Subsidiary)
Operating Activities
Net income	$	74,331		$	135,236		$	144,429		$	(277,275	)	$	76,721
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,781			—			140,152			—			143,933
Loss on early extinguishment of debt	2,225			—			—			—			2,225
Gain on sale of land parcel	—			—			(1,864		)	—			(1,864		)
Gain on sale of real estate	—			—			(1,564		)	—			(1,564		)
Non-cash impairment of real estate	4,799						5,000						9,799
Amortization of loan fees and costs	5,307			—			2,020			—			7,327
Amortization of debt premiums/discounts	104			—			297			—			401
Amortization of acquired above and below market leases	—			—			(2,356		)	—			(2,356		)
Deferred rent	164			—			(19,380		)	—			(19,216		)
Stock compensation expense	10,412			—			—			—			10,412
Equity in loss related to investments	—			26			—			—			26
Equity in (income) loss related to subsidiaries	(140,267		)	(134,346		)	(2,662		)	277,275			—
Gain on sales of investments	—			(1,109		)	(11,207		)	—			(12,316		)
Loss on sales of investments	—			195			1,412			—			1,607
Changes in operating assets and liabilities:
Restricted cash	(8		)	—			449			—			441
Tenant receivables	11			—			(2,648		)	—			(2,637		)
Deferred leasing costs	4,232			—			(27,829		)	—			(23,597		)
Other assets	2,603			—			(5,833		)	—			(3,230		)
Intercompany receivables and payables	(49		)	—			49			—			—
Accounts payable, accrued expenses, and tenant security deposits	3,592			—			37,786			—			41,378
Net cash provided by (used in) operating activities	(28,763		)	2			256,251			—			227,490
Investing Activities
Proceeds from sale of properties	—			—			36,179			—			36,179
Additions to properties	(1,192		)	—			(404,874		)	—			(406,066		)
Purchase of properties	—			—			(42,171		)	—			(42,171		)
Change in restricted cash related to construction projects	—			—			(11,453		)	—			(11,453		)
Distribution from unconsolidated real estate entity	—			—			22,250			—			22,250
Contributions to unconsolidated real estate entity	—			—			(5,042		)	—			(5,042		)
Investments in subsidiaries	(147,782		)	(112,504		)	(389		)	260,675			—
Additions to investments	—			(160		)	(21,837		)	—			(21,997		)
Proceeds from investments	—			1,944			17,961			—			19,905
Net cash provided by (used in) investing activities	$	(148,974	)	$	(110,720	)	$	(409,376	)	$	260,675		$	(408,395	)
Condensed Consolidating Statement of Cash Flows (continued)
for the Nine Months Ended September 30, 2012
(In thousands)
(Unaudited)
	Alexandria Real			Alexandria Real			Combined			Eliminations			Consolidated
	Estate Equities,			Estate Equities,			Non-Guarantor
	Inc. (Issuer)			L.P. (Guarantor			Subsidiaries
				Subsidiary)
Financing Activities
Borrowings from secured notes payable	$	—		$	—		$	2,874		$	—		$	2,874
Repayments of borrowings from secured notes payable	—			—			(8,125		)	—			(8,125		)
Proceeds from issuance of unsecured senior notes payable	549,533			—			—			—			549,533
Principal borrowings from unsecured senior line of credit and unsecured senior bank term loan	623,147			—			—			—			623,147
Repayments of borrowings from unsecured senior line of credit	(580,147		)	—			—			—			(580,147		)
Repayment of unsecured senior bank term loan	(250,000		)	—			—			—			(250,000		)
Repurchase of unsecured senior convertible notes	(84,801		)	—			—			—			(84,801		)
Redemption of Series C Cumulative Redeemable Preferred Stock	(129,638		)	—			—			—			(129,638		)
Proceeds from issuance of Series E Cumulative Redeemable Preferred Stock	124,868			—			—			—			124,868
Transfer to/from parent company	—			110,718			149,957			(260,675		)	—
Change in restricted cash related to financings	—			—			(10,476		)	—			(10,476		)
Deferred financing costs paid	(19,949		)	—			(5,352		)	—			(25,301		)
Proceeds from common stock offering	98,443			—			—			—			98,443
Proceeds from exercise of stock options	155			—			—			—			155
Dividends paid on common stock	(92,743		)	—			—			—			(92,743		)
Dividends paid on preferred stock	(21,348		)	—			—			—			(21,348		)
Distributions to redeemable noncontrolling interests	—			—			(943		)	—			(943		)
Redemption of redeemable noncontrolling interests	4			—			(154		)	—			(150		)
Contributions by noncontrolling interests	—			—			1,626			—			1,626
Distributions to noncontrolling interests	—			—			(770		)	—			(770		)
Net cash provided by (used in) financing activities	217,524			110,718			128,637			(260,675		)	196,204
Effect of foreign exchange rate changes on cash and cash equivalents	—			—			1,066			—			1,066
Net increase (decrease) in cash and cash equivalents	39,787			—			(23,422		)	—			16,365
Cash and cash equivalents at beginning of period	10,608			—			67,931			—			78,539
Cash and cash equivalents at end of period	$	50,395		$	—		$	44,509		$	—		$	94,904
Supplemental Disclosure of Cash Flow Information
Cash paid during the period for interest, net of interest capitalized	$	23,226		$	—		$	7,259		$	—		$	30,485
Non-Cash Investing Activities
Note receivable from sale of real estate	$	—		$	—		$	6,125		$	—		$	6,125

Basis_of_presentation_Details

Basis of presentation (Details)	9 Months Ended
	Sep. 30, 2013
Maximum	'
Basis of presentation	'
Percentage of ownership interest criteria	100.00%
Land improvements	'
Property, plant and equipment depreciated on a straight-line basis using an estimated life	'
Estimated useful life	'20 years
Buildings and building improvements | Maximum	'
Property, plant and equipment depreciated on a straight-line basis using an estimated life	'
Estimated useful life	'40 years

Basis_of_presentation_Details_

Basis of presentation (Details 2) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'	'	'	'	'
Maximum expected period of sale of property (in years)	'	'	'1 year	'	'
Cost method investment ownership percentage	10.00%	'	10.00%	'	10.00%
Minimum percentage of taxable income to be distributed	'	'	100.00%	'	'
The Company generally distributes this percentage or more of its taxable income	'	'	100.00%	'	'
Provision for federal income taxes	'	'	$0	'	'
The "more likely than not" probability threshold (as a percent)	'	'	50.00%	'	'
Unrecognized tax benefits	0	'	0	'	'
Interest income included in other income	1,200,000	1,000,000	3,500,000	2,500,000	'
Allowance for estimated losses	'	'	$0	'	$0
Percentage of leases which are triple net leases	94.00%	'	94.00%	'	'
Percentage of leases containing effective annual rent escalations	95.00%	'	95.00%	'	'
Percentage of leases providing for recapture of certain capital expenditures	92.00%	'	92.00%	'	'

Investments_in_real_estate_Sch

Investments in real estate Schedule of investment in real estates (Details) (USD $)	Sep. 30, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Real estate properties	'		'
Land (related to rental properties)	$542,511		$522,664
Buildings and building improvements	5,315,447		4,933,314
Other improvements	170,078		189,793
Rental properties	6,028,036		5,645,771
Less: accumulated depreciation	-915,494		-875,035
Rental properties, net	5,112,542		4,770,736
Construction in progress ("CIP")/current value-added projects:	'		'
Investments in real estate, net	6,613,761		6,424,578
Construction in progress ("CIP")/current value-added projects:	'		'
Construction in progress ("CIP")/current value-added projects:	'		'
Development in process	806,016		842,179
Active development in North America | North America	'		'
Construction in progress ("CIP")/current value-added projects:	'		'
Development in process	594,973		431,578
Investment in unconsolidated joint venture	'		'
Construction in progress ("CIP")/current value-added projects:	'		'
Development in process	42,537	[1]	28,656
Active redevelopment in North America | North America	'		'
Construction in progress ("CIP")/current value-added projects:	'		'
Development in process	24,960		199,744
Active development and redevelopment in Asia | Asia	'		'
Construction in progress ("CIP")/current value-added projects:	'		'
Development in process	97,319		101,602
Generic infrastructure/building improvement projects in North America | North America	'		'
Construction in progress ("CIP")/current value-added projects:	'		'
Development in process	46,227		80,599
Land/future value-added projects:	'		'
Land/future value-added projects:	'		'
Land available for development	695,203		811,663
Land undergoing predevelopment activities (CIP) in North America (2) | North America	'		'
Land/future value-added projects:	'		'
Land available for development	351,062		433,310
Land held for future development in North America | North America	'		'
Land/future value-added projects:	'		'
Land available for development	190,427		296,039
Land held for future development/undergoing predevelopment activities (CIP) in Asia | Asia	'		'
Land/future value-added projects:	'		'
Land available for development	77,274		82,314
Land subject to sale negotiations	'		'
Land/future value-added projects:	'		'
Land available for development	76,440		'
Rental properties, net and Construction in progress ("CIP")/current value-added projects	'		'
Construction in progress ("CIP")/current value-added projects:	'		'
Investments in real estate, net	$5,918,558		$5,612,915
[1]	The book value for this unconsolidated joint venture represents our equity investment in the project.

Investments_in_real_estate_Inv

Investments in real estate Investment in Unconsolidated Entity (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013
			Greater Boston market	Construction Loans	LIBOR	LIBOR	Dana-Farber Cancer Institute, Inc.
			Equity Method Investee	Greater Boston market	Construction Loans	Construction Loans	Greater Boston market
			sqft	Equity Method Investee	Greater Boston market	Greater Boston market	Equity Method Investee
					Equity Method Investee	Equity Method Investee
					Option
Schedule of Equity Method Investments [Line Items]	'	'	'	'	'	'	'
Equity interest percentage (in percent)	'	'	27.50%	'	'	'	'
Area of office property (square foot)	'	'	413,536	'	'	'	'
Pre-Leased percentage of property	'	'	'	'	'	'	37.00%
Equity method investments amount	$6,000	$6,000	$42,500,000	'	'	'	'
Aggregate commitments of construction loan	'	'	'	213,200,000	'	'	'
Drawn and outstanding construction loan	'	'	'	$75,000,000	'	'	'
Base rate	'	'	'	'	'LIBOR	'	'
Basis spread on LIBOR (as a percent)	'	'	'	'	3.75%	'	'
Minimum stated interest rate	'	'	'	'	'	5.25%	'
Number of one-year extension options	'	'	'	'	2	'	'

Investments_in_real_estate_Lan

Investments in real estate Land Held for Future Development (Details)	Sep. 30, 2013
	Transaction
Rental properties, net, construction in progress, and land held for (future value-added projects)	'
Number of construction or preconstruction activities	0
Alexandria Center at Kendall Square in East Cambridge Massachusetts	'
Rental properties, net, construction in progress, and land held for (future value-added projects)	'
Square feet undergoing preconstruction activities (square foot)	1,200,000
Preconstruction Prior to Vertical Construction | 50 and 100 Binney Street	'
Rental properties, net, construction in progress, and land held for (future value-added projects)	'
Area of office property (square foot)	1,200,000

Investments_in_real_estate_Rea

Investments in real estate Real Estate Asset Sales (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Dispositions	'	'	'	'
Gain (loss on) sale of land parcels	$0	$0	$772,000	$1,864,000
Building	'	'	'	'
Dispositions	'	'	'	'
Number of real estate properties sold	'	'	7	'
Aggregate consideration received	'	'	128,600,000	'
Number of properties sold at a gain	'	'	4	'
Gain on sale of properties net of tax	'	'	271,000	'
Number of properties sold at a loss	'	'	3	'
Loss on sale of properties net of tax	'	'	-392,000	'
Land	'	'	'	'
Dispositions	'	'	'	'
Number of real estate properties sold	'	'	3	'
Aggregate consideration received	'	'	18,100,000	'
Gain (loss on) sale of land parcels	772,000	'	'	'
Land | San Franciso Bay Area	'	'	'	'
Dispositions	'	'	'	'
Number of real estate properties sold	'	'	2	'
Gain (loss on) sale of land parcels	381,000	'	'	'
Land | New York City	'	'	'	'
Dispositions	'	'	'	'
Number of real estate properties sold	'	'	1	'
Gain (loss on) sale of land parcels	$391,000	'	'	'

Investments_Details

Investments (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Investments in privately held entities	'	'	'	'	'
Unrealized losses related to investments in privately held entities	'	'	$0	'	$0
“Available-for-sale” securities, cost basis	1,940,000	'	1,940,000	'	1,236,000
Gross unrealized gains	1,708,000	'	1,708,000	'	1,561,000
Gross unrealized losses	-392,000	'	-392,000	'	-88,000
“Available-for-sale” securities, at fair value	3,256,000	'	3,256,000	'	2,709,000
Investments accounted for under cost method	125,901,000	'	125,901,000	'	112,333,000
Investments accounted for under equity method	6,000	'	6,000	'	6,000
Total investments	129,163,000	'	129,163,000	'	115,048,000
Net investment income included in other income	'	'	'	'	'
Gross realized gains	2,050,000	1,190,000	4,716,000	12,316,000	'
Gross realized losses	0	-518,000	-529,000	-1,607,000	'
Equity in loss related to equity method investments	'	0	0	-26,000	'
Net investment income	2,050,000	672,000	4,187,000	10,683,000	'
Amount of gains (losses) reclassified from accumulated other comprehensive income to realized gains, net	$250,000	$1,421,000	$480,000	$2,107,000	'

Secured_and_unsecured_senior_d2

Secured and unsecured senior debt Narratives (Details) (USD $)

3 Months Ended

9 Months Ended

1 Months Ended

3 Months Ended

7 Months Ended

9 Months Ended

1 Months Ended

9 Months Ended

1 Months Ended

3 Months Ended

0 Months Ended

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Aug. 30, 2013

Apr. 30, 2012

Sep. 30, 2013

Jul. 31, 2013

Sep. 30, 2013

Sep. 30, 2013

Feb. 29, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Jul. 26, 2013

Jul. 26, 2013

Jul. 26, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

$1.5 billion unsecured senior line of credit

$1.5 billion unsecured senior line of credit

$1.5 billion unsecured senior line of credit

$1.5 billion unsecured senior line of credit

Senior Notes

Senior Notes

Unsecured Senior Notes Due in April 2022

Unsecured Senior Notes Due in April 2022

Unsecured Bank Term Loan 2016

Unsecured Bank Term Loan 2016

Unsecured Bank Term Loan 2016

Minimum

Maximum

Greater Boston market

Greater Boston market

Eurodollar

LIBOR

LIBOR

2016 Unsecured Senior Bank Term Loan

2016 Unsecured Senior Bank Term Loan

2016 Unsecured Senior Bank Term Loan

Equity Method Investee

Equity Method Investee

$1.5 billion unsecured senior line of credit

$1.5 billion unsecured senior line of credit

Greater Boston market

Construction Loans

Equity Method Investee

Construction Loans

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Equity interest percentage (in percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

27.50%

'

'

'

'

Public offering of senior notes payable

'

'

'

'

'

'

'

'

$500,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Stated interest rate (as a percent)

'

'

'

'

'

'

'

'

3.90%

'

'

4.60%

'

'

'

'

'

'

'

'

'

'

Price as a percentage of principal amount of notes payable

'

'

'

'

'

'

'

'

99.71%

'

'

'

'

'

'

'

'

'

'

'

'

'

Yield rate (as a percent)

'

'

'

'

'

'

'

'

3.94%

'

'

'

'

'

'

'

'

'

'

'

'

'

Maturity date

'

'

'

'

'

'

3-Jan-19

[1]

'

15-Jun-23

[1]

'

'

1-Apr-22

[1]

'

31-Jul-16

[1]

'

'

'

'

'

'

'

'

Ownership interest in subsidiary (as a percent)

'

'

'

'

'

'

'

'

'

'

100.00%

'

'

'

'

'

'

'

'

'

'

'

Repayment of outstanding principal

'

'

250,000,000

250,000,000

'

'

'

'

'

150,000,000

'

'

100,000,000

'

'

'

'

'

'

'

'

'

Loss on early extinguishment of debt

1,432,000

0

1,992,000

2,225,000

'

'

'

'

'

560,000

'

'

1,400,000

'

'

'

'

'

'

'

'

'

Expected prepayment of debt period

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'1 year

'3 years

'

'

'

'

'

Principal amount

2,870,843,000

'

2,870,843,000

'

'

'

14,000,000

'

1,048,190,000

'

'

'

500,000,000

500,000,000

'

'

'

'

'

'

'

'

Applicable margin (as a percent)

'

'

'

'

'

'

1.10%

[2]

1.20%

'

'

'

'

1.20%

1.20%

1.75%

'

'

'

'

1.00%

1.10%

3.75%

Annual facility fee (as a percent)

'

'

'

'

0.20%

0.20%

0.20%

0.25%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Aggregate commitments of construction loan

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

213,200,000

'

'

'

Drawn and outstanding construction loan

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$75,000,000

'

'

'

[1]

Includes any extension options that we control.

[2]

In addition to the stated rate, the line of credit is subject to an annual facility fee of 0.20%.

Secured_and_unsecured_senior_d3

Secured and unsecured senior debt Schedule of secured and unsecured senior debts (Details) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013
Debt Instrument [Line Items]	'
Fixed Rate/Hedged Variable Rate	$2,587,316
Unhedged Variable rate	283,527
Principal amount	2,870,843
Percentage of Total	100.00%
Effective rate (as a percent)	3.91%	[1]
Weighted Average Remaining Terms (in years)	'5 years 6 months 12 days
Percentage of fixed rate/hedged total debt	90.00%
Percentage of unhedged floating rate total debt	10.00%
Secured Debt	'
Debt Instrument [Line Items]	'
Fixed Rate/Hedged Variable Rate	589,126
Unhedged Variable rate	119,527
Principal amount	708,653
Percentage of Total	24.70%
Effective rate (as a percent)	5.47%	[1]
Weighted Average Remaining Terms (in years)	'2 years 6 months
Senior Notes	'
Debt Instrument [Line Items]	'
Fixed Rate/Hedged Variable Rate	1,048,190
Unhedged Variable rate	0
Principal amount	1,048,190
Percentage of Total	36.50%
Effective rate (as a percent)	4.29%	[1]
Weighted Average Remaining Terms (in years)	'9 years 1 month 6 days
Line of Credit	'
Debt Instrument [Line Items]	'
Fixed Rate/Hedged Variable Rate	0
Unhedged Variable rate	14,000
Principal amount	14,000
Percentage of Total	0.50%
Effective rate (as a percent)	1.28%	[1]
Weighted Average Remaining Terms (in years)	'5 years 3 months 12 days
Unsecured Bank Term Loan 2016	'
Debt Instrument [Line Items]	'
Fixed Rate/Hedged Variable Rate	350,000
Unhedged Variable rate	150,000
Principal amount	500,000
Percentage of Total	17.40%
Effective rate (as a percent)	1.70%	[1]
Weighted Average Remaining Terms (in years)	'2 years 9 months 12 days
Unsecured Bank Term Loan 2019	'
Debt Instrument [Line Items]	'
Fixed Rate/Hedged Variable Rate	600,000
Unhedged Variable rate	0
Principal amount	$600,000
Percentage of Total	20.90%
Effective rate (as a percent)	3.30%	[1]
Weighted Average Remaining Terms (in years)	'5 years 3 months 12 days
[1]	Represents the weighted average contractual interest rate as of the end of the period plus the impact of debt premiums/discounts and our interest rate swap agreements. The weighted average interest rate excludes bank fees and amortization of loan fees.

Secured_and_unsecured_senior_d4

Secured and unsecured senior debt Outstanding consolidated indebtedness (Details) (USD $)

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Aug. 30, 2013

Apr. 30, 2012

Sep. 30, 2013

Jul. 31, 2013

Sep. 30, 2013

Jul. 26, 2013

Aug. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Aug. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Jul. 31, 2013

Sep. 30, 2013

Sep. 30, 2013

2013

2014

2015

2016

2017

Thereafter

Secured notes payable

Secured notes payable from insurance co. maturing on 4/1/14

Secured notes payable from bank maturing on 4/20/14

Secured notes payable from bank maturing on 7/1/14

Secured notes payable from bank maturing on 11/1/14

Other secured notes payable maturing on 11/18/14

Secured notes payable from bank maturing on 6/1/15

CMBS maturing on 1/1/16

CMBS maturing on 4/1/16

CMBS maturing on 8/1/16

Secured notes payable maturing on 7/1/15

Secured notes payable maturing on 06/1/16

Secured notes payable maturing on 8/23/17

Other secured notes payable maturing on 4/1/20

Secured notes payable from bank maturing on 6/1/37

$1.5 billion unsecured senior line of credit

$1.5 billion unsecured senior line of credit

$1.5 billion unsecured senior line of credit

$1.5 billion unsecured senior line of credit

$1.5 billion unsecured senior line of credit

2016 Unsecured Senior Bank Term Loan

2016 Unsecured Senior Bank Term Loan

2016 Unsecured Senior Bank Term Loan

2016 Unsecured Senior Bank Term Loan

Unsecured Bank Term Loan 2019

Unsecured Bank Term Loan 2019

Unsecured Bank Term Loan 2019

Unsecured Bank Term Loan 2019

Unsecured Senior Notes Due in April 2022

Unsecured Senior Notes 2023

Option

Option

Extension_Option

Extension_Option

Extension_Option

Summary of fixed rate/hedged and floating rate debt

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fixed Rate/Hedged Variable Rate

$2,587,316,000

$2,471,000

$229,176,000

$12,693,000

$583,143,000

$1,668,000

$1,758,165,000

$589,126,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$0

'

$0

'

'

$350,000,000

$350,000,000

'

$600,000,000

$600,000,000

'

'

'

Unhedged Variable rate

283,527,000

60,000

76,240,000

43,227,000

150,000,000

0

14,000,000

119,527,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

14,000,000

'

14,000,000

'

'

150,000,000

150,000,000

'

0

0

'

'

'

Principal amount

2,870,843,000

2,531,000

305,416,000

55,920,000

733,143,000

1,668,000

1,772,165,000

708,653,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

14,000,000

'

14,000,000

'

'

500,000,000

500,000,000

'

600,000,000

600,000,000

'

'

'

Stated interest rate (as a percent)

'

'

'

'

'

'

'

5.41%

5.26%

2.17%

6.05%

5.39%

6.00%

5.64%

5.73%

5.82%

6.35%

'

'

'

7.75%

6.50%

'

'

'

'

'

'

'

'

'

'

'

'

'

4.60%

3.90%

Base rate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'LIBOR

'LIBOR

'LIBOR

'

'

'LIBOR

'

'

'LIBOR

'LIBOR

[1]

'LIBOR

'LIBOR

'

'LIBOR

'LIBOR

'

'LIBOR

'

'

'

Basis spread on LIBOR (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.50%

1.40%

1.35%

'

'

'

'

1.10%

[1]

1.20%

1.10%

[1]

1.75%

'

1.20%

1.20%

'

1.20%

1.20%

1.50%

'

'

Effective rate (as a percent)

3.91%

[2]

'

'

'

'

'

'

5.47%

[2]

5.59%

[2]

2.17%

[2]

4.88%

[2]

4.00%

[2]

6.00%

[2]

4.50%

[2]

5.73%

[2]

5.82%

[2]

6.35%

[2]

1.69%

[2]

1.59%

[2]

1.54%

[2]

7.75%

[2]

6.50%

[2]

'

'

1.28%

[2]

'

1.28%

[2]

'

'

1.70%

[2]

1.70%

[2]

'

3.30%

[2]

3.30%

[2]

'

4.61%

3.94%

Maturity date

'

'

'

'

'

'

'

'

1-Apr-14

[3]

20-Apr-14

[3],[4]

1-Jul-14

[3]

1-Nov-14

[3]

18-Nov-14

[3]

1-Jun-15

[3]

1-Jan-16

[3]

1-Apr-16

[3]

1-Aug-16

[3]

1-Jul-15

[3],[5]

1-Jun-16

[3],[6]

23-Aug-17

[3],[7]

1-Apr-20

[3]

1-Jun-37

[3]

'

'

3-Jan-19

[3]

'

'

'

'

31-Jul-16

[3]

'

'

3-Jan-19

[3]

'

'

1-Apr-22

[3]

15-Jun-23

[3]

Aggregate commitments of construction loan

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

55,000,000

33,000,000

245,400,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Annual facility fee (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.20%

0.20%

0.20%

0.25%

'

'

'

'

'

'

'

'

'

'

'

Number of extensions on line of credit

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2

2

1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Future principal payments due on secured and unsecured debt

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2013

'

'

'

'

'

'

'

2,677,000

979,000

0

24,000

30,000

60,000

22,000

416,000

221,000

580,000

0

0

0

345,000

0

'

'

0

'

0

'

'

0

0

'

0

0

'

0

0

2014

'

'

'

'

'

'

'

305,615,000

208,683,000

76,000,000

6,458,000

7,495,000

240,000

138,000

1,713,000

931,000

2,487,000

0

0

0

1,453,000

17,000

'

'

0

'

0

'

'

0

0

'

0

0

'

0

0

2015

'

'

'

'

'

'

'

56,059,000

0

0

0

0

0

5,788,000

1,816,000

988,000

2,652,000

43,227,000

0

0

1,570,000

18,000

'

'

0

'

0

'

'

0

0

'

0

0

'

0

0

2016

'

'

'

'

'

'

'

233,320,000

0

0

0

0

0

0

75,501,000

29,389,000

126,715,000

0

0

0

1,696,000

19,000

'

'

0

'

0

'

'

500,000,000

500,000,000

'

0

0

'

0

0

2017

'

'

'

'

'

'

'

1,852,000

0

0

0

0

0

0

0

0

0

0

0

0

1,832,000

20,000

'

'

0

'

0

'

'

0

0

'

0

0

'

0

0

Thereafter

'

'

'

'

'

'

'

109,242,000

0

0

0

0

0

0

0

0

0

0

0

0

108,469,000

773,000

'

'

14,000,000

'

14,000,000

'

'

0

0

'

600,000,000

600,000,000

'

550,000,000

500,000,000

Unamortized discount

-1,922,000

-146,000

-199,000

-139,000

-177,000

-184,000

-1,077,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Principal amount

2,872,765,000

2,677,000

305,615,000

56,059,000

733,320,000

1,852,000

1,773,242,000

708,765,000

209,662,000

76,000,000

6,482,000

7,525,000

300,000

5,948,000

79,446,000

31,529,000

132,434,000

43,227,000

0

0

115,365,000

847,000

'

'

14,000,000

'

14,000,000

'

'

500,000,000

500,000,000

'

600,000,000

600,000,000

'

550,000,000

500,000,000

Total consolidated debt, Effective Interest

3.91%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Balloon payments

2,844,416,000

0

297,080,000

48,955,000

730,029,000

0

1,768,352,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Principal amortization

$26,427,000

$2,531,000

$8,336,000

$6,965,000

$3,114,000

$1,668,000

$3,813,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

[1]

In addition to the stated rate, the line of credit is subject to an annual facility fee of 0.20%.

[2]

Represents the weighted average contractual interest rate as of the end of the period plus the impact of debt premiums/discounts and our interest rate swap agreements. The weighted average interest rate excludes bank fees and amortization of loan fees.

[3]

Includes any extension options that we control.

[4]

We are having discussions with the lender on an extension of the maturity date.

[5]

Secured construction loan with aggregate commitments of $55.0 million. We have two, one-year options to extend the stated maturity date to July 1, 2017, subject to certain conditions.

[6]

Secured construction loan with aggregate commitments of $33.0 million. We have two, one-year options to extend the stated maturity date to June 1, 2018, subject to certain conditions. As of September 30, 2013, we had not drawn on the loan.

[7]

Secured construction loan with aggregate commitments of $245.4 million. We have a one-year option to extend the stated maturity date to August 23, 2018, subject to certain conditions. As of September 30, 2013, we had not drawn on the loan.

Secured_and_unsecured_senior_d5

Secured and unsecured senior debt Schedule of changes made to long-term debts (Details) (USD $)

Sep. 30, 2013

Jul. 26, 2013

Aug. 30, 2013

Sep. 30, 2013

Aug. 30, 2013

Sep. 30, 2013

Jul. 31, 2013

Aug. 30, 2013

Apr. 30, 2012

Sep. 30, 2013

Jul. 31, 2013

Sep. 30, 2013

In Thousands, unless otherwise specified

Unsecured Bank Term Loan 2016

Unsecured Bank Term Loan 2016

Unsecured Bank Term Loan 2016

Unsecured Bank Term Loan 2019

Unsecured Bank Term Loan 2019

Unsecured Bank Term Loan 2019

Line of Credit

Line of Credit

Line of Credit

Line of Credit

Line of Credit

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Principal amount

$2,870,843

'

'

$500,000

'

$600,000

'

'

'

$14,000

'

$14,000

Basis spread on LIBOR (as a percent)

'

1.75%

'

1.20%

'

1.20%

1.50%

'

'

1.10%

[1]

1.20%

1.10%

[1]

Annual facility fee (as a percent)

'

'

'

'

'

'

'

0.20%

0.20%

0.20%

0.25%

'

Base rate

'

'LIBOR

'LIBOR

'LIBOR

'LIBOR

'LIBOR

'

'LIBOR

'

'

'LIBOR

'LIBOR

[1]

[1]

In addition to the stated rate, the line of credit is subject to an annual facility fee of 0.20%.

Secured_and_unsecured_senior_d6

Secured and unsecured senior debt Interest Expense (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Interest expense incurred	'	'	'	'
Gross interest	$32,959	$33,855	$96,668	$99,094
Capitalized interest	-16,788	-16,763	-46,499	-47,854
Interest expense	$16,171	$17,092	$50,169	$51,240

Interest_rate_swap_agreements_2

Interest rate swap agreements (Details) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'	'	'
The percentage of effectiveness of interest rate swap agreements	100.00%	100.00%	'
Interest rate swap hedge ineffectiveness recognized in earnings	$0	$0	'
Cash flow hedge loss to be reclassified within twelve month	8,500,000	'	'
Cash flow hedge liability at fair value	9,319,000	'	20,700,000
Collateral obligation requirements	$0	'	'

Interest_rate_swap_agreements_3

Interest rate swap agreements Outstanding interest rate swap (Details) (USD $)	Sep. 30, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Interest rate hedge agreements	'		'
Fair Values	($9,319)		($20,700)
Notional Amount in Effect	950,000		'
Notional Amount in Effect at Fiscal Year End	700,000		'
Unsecured Senior Line of Credit and Bank Term Loans | Minimum	'		'
Interest rate hedge agreements	'		'
Applicable margin (as a percent)	1.20%		'
Transaction Date December 2006, Interest Pay Rate 4.990%	'		'
Interest rate hedge agreements	'		'
Interest Pay Rate (as a percent)	4.99%	[1]	'
Fair Values	-1,205		'
Notional Amount in Effect	50,000		'
Notional Amount in Effect at Fiscal Year End	50,000		'
Transaction Date October 2007, Interest Pay Rate 4.642%	'		'
Interest rate hedge agreements	'		'
Interest Pay Rate (as a percent)	5.02%	[1]	'
Fair Values	-1,817		'
Notional Amount in Effect	75,000		'
Notional Amount in Effect at Fiscal Year End	75,000		'
Transaction Date December 2006, Interest Pay Rate 5.015%.	'		'
Interest rate hedge agreements	'		'
Interest Pay Rate (as a percent)	5.02%	[1]	'
Fair Values	-1,820		'
Notional Amount in Effect	75,000		'
Notional Amount in Effect at Fiscal Year End	75,000		'
Transaction Date December 2006, Interest Pay Rate 5.023%	'		'
Interest rate hedge agreements	'		'
Interest Pay Rate (as a percent)	0.64%	[1]	'
Fair Values	-291		'
Notional Amount in Effect	250,000		'
Notional Amount in Effect at Fiscal Year End	0		'
Transaction date December 2011, interest pay rate 0.640%	'		'
Interest rate hedge agreements	'		'
Interest Pay Rate (as a percent)	0.64%	[1]	'
Fair Values	-291		'
Notional Amount in Effect	250,000		'
Notional Amount in Effect at Fiscal Year End	0		'
Transaction date December 2011, interest pay rate 0.640%	'		'
Interest rate hedge agreements	'		'
Interest Pay Rate (as a percent)	0.64%	[1]	'
Fair Values	-147		'
Notional Amount in Effect	125,000		'
Notional Amount in Effect at Fiscal Year End	0		'
Transaction date December 2011, interest pay rate 0.644%	'		'
Interest rate hedge agreements	'		'
Interest Pay Rate (as a percent)	0.64%	[1]	'
Fair Values	-147		'
Notional Amount in Effect	125,000		'
Notional Amount in Effect at Fiscal Year End	0		'
Transaction date December 2011, interest pay rate 0.644%	'		'
Interest rate hedge agreements	'		'
Interest Pay Rate (as a percent)	0.98%	[1]	'
Fair Values	-1,802		'
Notional Amount in Effect	0		'
Notional Amount in Effect at Fiscal Year End	250,000		'
Transaction date December 2011, interest pay rate 0.977%	'		'
Interest rate hedge agreements	'		'
Interest Pay Rate (as a percent)	0.98%	[1]	'
Fair Values	-1,799		'
Notional Amount in Effect	0		'
Notional Amount in Effect at Fiscal Year End	$250,000		'
[1]	In addition to the interest pay rate, borrowings outstanding under our unsecured senior bank term loans include an applicable margin of 1.20% as of September 30, 2013.

Fair_value_measurements_Assets

Fair value measurements Assets and Liabilities on Recurring Basis (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Assets:	'	'
Marketable securities	$3,256	$2,709
Fair value measured on recurring basis | Fair Value	'	'
Assets:	'	'
Marketable securities	3,256	2,709
Liabilities:	'	'
Interest rate swap agreements	9,319	20,661
Fair value measured on recurring basis | Quoted Prices in Active Markets for Identical Assets and Liabilities	'	'
Assets:	'	'
Marketable securities	3,256	2,709
Liabilities:	'	'
Interest rate swap agreements	0	0
Fair value measured on recurring basis | Significant Other Observable Inputs	'	'
Assets:	'	'
Marketable securities	0	0
Liabilities:	'	'
Interest rate swap agreements	9,319	20,661
Fair value measured on recurring basis | Significant Unobservable Inputs	'	'
Assets:	'	'
Marketable securities	0	0
Liabilities:	'	'
Interest rate swap agreements	$0	$0

Fair_value_measurements_Book_a

Fair value measurements Book and Fair Values (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Summary of marketable securities, secured notes payable, unsecured senior line of credit, unsecured term loans, and unsecured senior convertible notes	'	'
Marketable securities	$3,256	$2,709
Book Value	'	'
Summary of marketable securities, secured notes payable, unsecured senior line of credit, unsecured term loans, and unsecured senior convertible notes	'	'
Marketable securities	3,256	2,709
Interest rate swap agreements	9,319	20,661
Secured notes payable	708,653	716,144
Unsecured senior notes payable	1,048,190	549,805
Unsecured senior line of credit	14,000	566,000
Unsecured senior bank term loans	1,100,000	1,350,000
Fair Value	'	'
Summary of marketable securities, secured notes payable, unsecured senior line of credit, unsecured term loans, and unsecured senior convertible notes	'	'
Marketable securities	3,256	2,709
Interest rate swap agreements	9,319	20,661
Secured notes payable	761,047	788,455
Unsecured senior notes payable	1,028,750	593,350
Unsecured senior line of credit	13,738	567,196
Unsecured senior bank term loans	$1,088,322	$1,405,124

Earnings_per_share_Details

Earnings per share (Details) (USD $)	3 Months Ended				9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Earnings per share	'		'		'		'
Income from continuing operations	$32,517		$22,501		$94,262		$69,695
Gain on sale of land parcel	0		0		772		1,864
Net income attributable to noncontrolling interests	-960		-828		-2,922		-2,390
Dividends on preferred stock	-6,472		-6,471		-19,414		-20,857
Preferred stock redemption charge	0		0		0		-5,978
Net income attributable to unvested restricted stock awards	-442		-360		-1,187		-866
Income from continuing operations attributable to Alexandria Real Estate Equities, Inc.'s common stockholders - basic and diluted	24,643		14,842		71,511		41,468
(Loss) income from discontinued operations, net	-64	[1]	-4,196	[1]	993	[1]	5,162	[1]
Net income attributable to Alexandria’s common stockholders	$24,579		$10,646		$72,504		$46,630
Weighted Average Number of Shares Outstanding, Basic and Diluted	70,900		62,364		67,040		61,847
Earnings per share attributable to Alexandria Real Estate Equities, Inc.'s common stockholders - basic and diluted:	'		'		'		'
Continuing operations	$0.35		$0.24		$1.07		$0.67
Discontinued operations, net	$0		($0.07)		$0.01		$0.08
Earnings per share – basic and diluted	$0.35		$0.17		$1.08		$0.75
8.00% Unsecured Senior Convertible Notes	'		'		'		'
Debt Instrument [Line Items]	'		'		'		'
Stated interest rate (as a percent)	8.00%		'		8.00%		'
[1]	(Loss) income from discontinued operations, net, includes the results of operations for two operating properties that were classified as “held for sale” as of September 30, 2013, as well as the results of operations (prior to disposition) and (gain) loss on sale of real estate attributable to 10 properties sold during the period from January 1, 2012, to September 30, 2013.

Net_income_attributable_to_Ale2

Net income attributable to Alexandria Real Estate Equities, Inc. (Details) (USD $)	3 Months Ended				9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Net income attributable to Alexandria Real Estate Equities, Inc.:	'		'		'		'
Income from continuing operations	$32,517		$22,501		$94,262		$69,695
Gain on sale of land parcel	0		0		772		1,864
Less: net income attributable to noncontrolling interests	-960		-828		-2,922		-2,390
Income from continuing operations attributable to Alexandria Real Estate Equities, Inc.	31,557		21,673		92,112		69,169
(Loss) income from discontinued operations, net	-64	[1]	-4,196	[1]	993	[1]	5,162	[1]
Less: net income (loss) from discontinued operations attributable to noncontrolling interests	0		0		0		0
Net income attributable to Alexandria Real Estate Equities, Inc.	$31,493		$17,477		$93,105		$74,331
[1]	(Loss) income from discontinued operations, net, includes the results of operations for two operating properties that were classified as “held for sale” as of September 30, 2013, as well as the results of operations (prior to disposition) and (gain) loss on sale of real estate attributable to 10 properties sold during the period from January 1, 2012, to September 30, 2013.

Stockholders_equity_Details

Stockholders' equity (Details) (USD $)	3 Months Ended	9 Months Ended		3 Months Ended	1 Months Ended				3 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	31-May-13	15-May-13	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013
				Series E Preferred Stock	Common Stock	Common Stock	Common Stock	Common Stock	7.00% series D Convertible Preferred Stock
							At-the-market equity offering programs	At-the-market equity offering programs
Issuances of common stock	'	'	'	'	'	'	'	'	'
Stock issued in secondary offering (in shares)	'	'	'	'	7,600,000	'	'	'	'
Stock issued pursuant to the exercise of underwriters' option (in shares)	'	'	'	'	1,000,000	'	'	'	'
Shares issued price (dollars per share)	'	'	'	'	'	$73.50	'	'	'
Aggregate net proceeds from issuance of common stock	'	$535,686,000	$98,443,000	'	'	'	'	'	'
Aggregate value of the shares of common stock to be sold	'	'	'	'	'	'	'	250,000,000	'
Aggregate value of shares available for issuance	'	'	'	'	'	'	150,000,000	'	'
Cash dividend on common stock declared	48,700,000	133,388,000	'	'	'	'	'	'	'
Cash dividend on common stock declared (in dollars per share)	$0.68	'	'	'	'	'	'	'	'
Cash dividend on preferred stock declared	'	$19,414,000	'	$2,100,000	'	'	'	'	$4,400,000
Cash dividend on preferred stock declared (in dollars per share)	'	'	'	$0.40	'	'	'	'	$0.44
Preferred stock, shares authorized	100,000,000	100,000,000	'	'	'	'	'	'	'
Number of shares issued and outstanding	15,200,000	15,200,000	'	'	'	'	'	'	'
Number of "excess stock" authorized (in shares)	'	200,000,000	'	'	'	'	'	'	'
Number of excess stock authorized issued and outstanding (in shares)	0	0	'	'	'	'	'	'	'

Stockholders_equity_Schedule_o

Stockholders' equity Schedule of Accumulated Other Comprehensive Income (Loss) (Details) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013
Change in accumulated other comprehensive loss	'
Balance at the beginning of the period	($24,833)
Other comprehensive income (loss) before reclassifications	-26,759
Amounts reclassified from other comprehensive income	11,566
Net other comprehensive (loss) income	-15,193
Balance at the end of the period	-40,026
Unrealized Gain on Marketable Securities	'
Change in accumulated other comprehensive loss	'
Balance at the beginning of the period	1,473
Other comprehensive income (loss) before reclassifications	323
Amounts reclassified from other comprehensive income	-480
Net other comprehensive (loss) income	-157
Balance at the end of the period	1,316
Unrealized Loss on Interest Rate Swap Agreements	'
Change in accumulated other comprehensive loss	'
Balance at the beginning of the period	-20,661
Other comprehensive income (loss) before reclassifications	-704
Amounts reclassified from other comprehensive income	12,046
Net other comprehensive (loss) income	11,342
Balance at the end of the period	-9,319
Unrealized Loss on Foreign Currency Translation	'
Change in accumulated other comprehensive loss	'
Balance at the beginning of the period	-5,645
Other comprehensive income (loss) before reclassifications	-26,378
Amounts reclassified from other comprehensive income	0
Net other comprehensive (loss) income	-26,378
Balance at the end of the period	($32,023)

Noncontrolling_interests_Detai

Noncontrolling interests (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Noncontrolling interests	'	'
Redeemable noncontrolling interest balances	$14,475	$14,564
Remaining noncontrolling interests	47,471	46,643
Noncontrolling Interests	'	'
Noncontrolling interests	'	'
Number of properties owned	10	'
Number of development parcels owned	3	'
Redeemable noncontrolling interest balances	14,500	14,600
Remaining noncontrolling interests	$47,471	$46,643

Discontinued_operations_Detail

Discontinued operations (Details) (USD $)	3 Months Ended				9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012		Dec. 31, 2012
	property
Net assets of discontinued operations	'		'		'		'		'
Properties "held for sale, "net	$4,510		'		$4,510		'		$76,440
Other assets	14		'		14		'		4,546
Total assets	4,524		'		4,524		'		80,986
Total liabilities	-32		'		-32		'		-3,233
Net assets of discontinued operations	4,492		'		4,492		'		77,753
Income from discontinued operations, net	'		'		'		'		'
Total revenues	4		8,418		3,741		26,556		'
Operating expenses	68		2,788		1,697		8,337		'
Total revenues less operating expenses from discontinued operations	-64		5,630		2,044		18,219		'
Depreciation expense	0		1,589		930		4,822		'
Loss (gain) on sale of real estate	0		-1,562		121		-1,564		'
Impairment of real estate	0		9,799		0		9,799		'
(Loss) income from discontinued operations, net	($64)	[1]	($4,196)	[1]	$993	[1]	$5,162	[1]	'
Number of operating properties classified as held for sale	2		'		'		'		'
Number of properties sold	10		'		'		'		'
[1]	(Loss) income from discontinued operations, net, includes the results of operations for two operating properties that were classified as “held for sale” as of September 30, 2013, as well as the results of operations (prior to disposition) and (gain) loss on sale of real estate attributable to 10 properties sold during the period from January 1, 2012, to September 30, 2013.

Subsequent_events_Details

Subsequent events (Details) (Subsequent Event, Biopharmaceutical Company, 499 Illinois Street)	1 Months Ended
	Oct. 31, 2013
	sqft
Subsequent Event | Biopharmaceutical Company | 499 Illinois Street	'
Subsequent Event [Line Items]	'
Real estate property leasing term	'10 years
Increase (decrease) in area of leased property	43,625
Real estate leasing percentage	77.00%

Condensed_consolidating_financ2

Condensed consolidating financial information Balance Sheet (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Assets	'	'	'	'
Investments in real estate, net	$6,613,761	$6,424,578	'	'
Cash and cash equivalents	53,839	140,971	94,904	78,539
Restricted cash	30,654	39,947	'	'
Tenant receivables	8,671	8,449	'	'
Deferred rent	182,909	170,396	'	'
Deferred leasing and financing costs, net	179,805	160,048	'	'
Investments	129,163	115,048	'	'
Investments in and advances to affiliates	0	0	'	'
Intercompany note receivable	'	0	'	'
Other assets	159,567	90,679	'	'
Total assets	7,358,369	7,150,116	'	'
Liabilities, Noncontrolling Interests, and Equity	'	'	'	'
Secured notes payable	708,653	716,144	'	'
Unsecured senior notes payable	1,048,190	549,805	'	'
Unsecured senior line of credit	14,000	566,000	'	'
Unsecured senior bank term loans	1,100,000	1,350,000	'	'
Accounts payable, accrued expenses, and tenant security deposits	452,139	423,708	'	'
Dividends payable	54,413	41,401	'	'
Intercompany notes payable	'	0	'	'
Total liabilities	3,377,395	3,647,058	'	'
Redeemable noncontrolling interests	14,475	14,564	'	'
Stockholders' Equity Attributable to Parent	3,919,028	3,441,851	'	'
Noncontrolling interests	47,471	46,643	'	'
Total equity	3,966,499	3,488,494	'	'
Total liabilities, noncontrolling interests, and equity	7,358,369	7,150,116	'	'
Alexandria Real Estate Equities, Inc. (Issuer)	'	'	'	'
Assets	'	'	'	'
Investments in real estate, net	0	38,616	'	'
Cash and cash equivalents	14,667	98,567	50,395	10,608
Restricted cash	61	52	'	'
Tenant receivables	0	1	'	'
Deferred rent	0	1,876	'	'
Deferred leasing and financing costs, net	38,462	31,373	'	'
Investments	0	0	'	'
Investments in and advances to affiliates	6,119,819	5,833,368	'	'
Intercompany note receivable	'	3,021	'	'
Other assets	17,801	17,613	'	'
Total assets	6,190,810	6,024,487	'	'
Liabilities, Noncontrolling Interests, and Equity	'	'	'	'
Secured notes payable	0	0	'	'
Unsecured senior notes payable	1,048,190	549,805	'	'
Unsecured senior line of credit	14,000	566,000	'	'
Unsecured senior bank term loans	1,100,000	1,350,000	'	'
Accounts payable, accrued expenses, and tenant security deposits	55,467	75,728	'	'
Dividends payable	54,125	41,103	'	'
Intercompany notes payable	'	0	'	'
Total liabilities	2,271,782	2,582,636	'	'
Redeemable noncontrolling interests	0	0	'	'
Stockholders' Equity Attributable to Parent	3,919,028	3,441,851	'	'
Noncontrolling interests	0	0	'	'
Total equity	3,919,028	3,441,851	'	'
Total liabilities, noncontrolling interests, and equity	6,190,810	6,024,487	'	'
Alexandria Real Estate Equities, L.P. (Guarantor Subsidiary)	'	'	'	'
Assets	'	'	'	'
Investments in real estate, net	0	0	'	'
Cash and cash equivalents	0	1,913	0	0
Restricted cash	0	0	'	'
Tenant receivables	0	0	'	'
Deferred rent	0	0	'	'
Deferred leasing and financing costs, net	0	0	'	'
Investments	11,828	12,591	'	'
Investments in and advances to affiliates	5,655,063	5,358,883	'	'
Intercompany note receivable	'	0	'	'
Other assets	0	0	'	'
Total assets	5,666,891	5,373,387	'	'
Liabilities, Noncontrolling Interests, and Equity	'	'	'	'
Secured notes payable	0	0	'	'
Unsecured senior notes payable	0	0	'	'
Unsecured senior line of credit	0	0	'	'
Unsecured senior bank term loans	0	0	'	'
Accounts payable, accrued expenses, and tenant security deposits	0	0	'	'
Dividends payable	0	0	'	'
Intercompany notes payable	'	0	'	'
Total liabilities	0	0	'	'
Redeemable noncontrolling interests	0	0	'	'
Stockholders' Equity Attributable to Parent	5,666,891	5,373,387	'	'
Noncontrolling interests	0	0	'	'
Total equity	5,666,891	5,373,387	'	'
Total liabilities, noncontrolling interests, and equity	5,666,891	5,373,387	'	'
Combined Non- Guarantor Subsidiaries	'	'	'	'
Assets	'	'	'	'
Investments in real estate, net	6,613,761	6,385,962	'	'
Cash and cash equivalents	39,172	40,491	44,509	67,931
Restricted cash	30,593	39,895	'	'
Tenant receivables	8,671	8,448	'	'
Deferred rent	182,909	168,520	'	'
Deferred leasing and financing costs, net	141,343	128,675	'	'
Investments	117,335	102,457	'	'
Investments in and advances to affiliates	116,004	110,100	'	'
Intercompany note receivable	'	0	'	'
Other assets	141,766	73,066	'	'
Total assets	7,391,554	7,057,614	'	'
Liabilities, Noncontrolling Interests, and Equity	'	'	'	'
Secured notes payable	708,653	716,144	'	'
Unsecured senior notes payable	0	0	'	'
Unsecured senior line of credit	0	0	'	'
Unsecured senior bank term loans	0	0	'	'
Accounts payable, accrued expenses, and tenant security deposits	396,672	347,980	'	'
Dividends payable	288	298	'	'
Intercompany notes payable	'	3,021	'	'
Total liabilities	1,105,613	1,067,443	'	'
Redeemable noncontrolling interests	14,475	14,564	'	'
Stockholders' Equity Attributable to Parent	6,223,995	5,928,964	'	'
Noncontrolling interests	47,471	46,643	'	'
Total equity	6,271,466	5,975,607	'	'
Total liabilities, noncontrolling interests, and equity	7,391,554	7,057,614	'	'
Eliminations	'	'	'	'
Assets	'	'	'	'
Investments in real estate, net	0	0	'	'
Cash and cash equivalents	0	0	0	0
Restricted cash	0	0	'	'
Tenant receivables	0	0	'	'
Deferred rent	0	0	'	'
Deferred leasing and financing costs, net	0	0	'	'
Investments	0	0	'	'
Investments in and advances to affiliates	-11,890,886	-11,302,351	'	'
Intercompany note receivable	'	-3,021	'	'
Other assets	0	0	'	'
Total assets	-11,890,886	-11,305,372	'	'
Liabilities, Noncontrolling Interests, and Equity	'	'	'	'
Secured notes payable	0	0	'	'
Unsecured senior notes payable	0	0	'	'
Unsecured senior line of credit	0	0	'	'
Unsecured senior bank term loans	0	0	'	'
Accounts payable, accrued expenses, and tenant security deposits	0	0	'	'
Dividends payable	0	0	'	'
Intercompany notes payable	'	-3,021	'	'
Total liabilities	0	-3,021	'	'
Redeemable noncontrolling interests	0	0	'	'
Stockholders' Equity Attributable to Parent	-11,890,886	-11,302,351	'	'
Noncontrolling interests	0	0	'	'
Total equity	-11,890,886	-11,302,351	'	'
Total liabilities, noncontrolling interests, and equity	($11,890,886)	($11,305,372)	'	'

Condensed_consolidating_financ3

Condensed consolidating financial information Income Statement (Details) (USD $)	3 Months Ended				9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Revenues:	'		'		'		'
Rental	$116,302		$106,216		$342,821		$311,746
Tenant recoveries	38,757		34,006		110,291		97,769
Other income (loss)	3,571		2,628		10,133		14,639
Total revenues	158,630		142,850		463,245		424,154
Expenses:	'		'		'		'
Rental operations	47,742		44,203		139,289		126,758
General and administrative	11,666		12,470		35,786		35,125
Interest	16,171		17,092		50,169		51,240
Depreciation and amortization	49,102		46,584		141,747		139,111
Loss on early extinguishment of debt	1,432		0		1,992		2,225
Total expenses	126,113		120,349		368,983		354,459
(Loss) income from continuing operations before equity in earnings of affiliates	32,517		22,501		94,262		69,695
Equity in (income) loss related to subsidiaries	0		0		0		0
Income from continuing operations	32,517		22,501		94,262		69,695
(Loss) income from discontinued operations, net	-64	[1]	-4,196	[1]	993	[1]	5,162	[1]
Gain on sale of land parcel	0		0		772		1,864
Net income	32,453		18,305		96,027		76,721
Net income attributable to noncontrolling interests	960		828		2,922		2,390
Dividends on preferred stock	6,472		6,471		19,414		20,857
Preferred stock redemption charge	0		0		0		5,978
Net income attributable to unvested restricted stock awards	442		360		1,187		866
Net income attributable to Alexandria’s common stockholders	24,579		10,646		72,504		46,630
Alexandria Real Estate Equities, Inc. (Issuer)	'		'		'		'
Revenues:	'		'		'		'
Rental	0		0		0		0
Tenant recoveries	0		0		0		0
Other income (loss)	2,802		2,785		8,071		7,593
Total revenues	2,802		2,785		8,071		7,593
Expenses:	'		'		'		'
Rental operations	0		0		0		0
General and administrative	10,141		9,587		32,574		32,030
Interest	10,238		11,785		32,048		34,460
Depreciation and amortization	1,472		1,725		4,393		3,781
Loss on early extinguishment of debt	1,432		'		1,992		2,225
Total expenses	23,283		23,097		71,007		72,496
(Loss) income from continuing operations before equity in earnings of affiliates	-20,481		-20,312		-62,936		-64,903
Equity in (income) loss related to subsidiaries	51,975		41,380		155,694		140,267
Income from continuing operations	31,494		21,068		92,758		75,364
(Loss) income from discontinued operations, net	-1		-3,591		347		-1,033
Gain on sale of land parcel	'		'		0		0
Net income	31,493		17,477		93,105		74,331
Net income attributable to noncontrolling interests	0		0		0		0
Dividends on preferred stock	6,472		6,471		19,414		20,857
Preferred stock redemption charge	'		'		'		5,978
Net income attributable to unvested restricted stock awards	442		360		1,187		866
Net income attributable to Alexandria’s common stockholders	24,579		10,646		72,504		46,630
Alexandria Real Estate Equities, L.P. (Guarantor Subsidiary)	'		'		'		'
Revenues:	'		'		'		'
Rental	0		0		0		0
Tenant recoveries	0		0		0		0
Other income (loss)	-1		51		-142		891
Total revenues	-1		51		-142		891
Expenses:	'		'		'		'
Rental operations	0		0		0		0
General and administrative	0		0		0		1
Interest	0		0		0		0
Depreciation and amortization	0		0		0		0
Loss on early extinguishment of debt	0		'		0		0
Total expenses	0		0		0		1
(Loss) income from continuing operations before equity in earnings of affiliates	-1		51		-142		890
Equity in (income) loss related to subsidiaries	48,477		42,064		144,660		134,346
Income from continuing operations	48,476		42,115		144,518		135,236
(Loss) income from discontinued operations, net	0		0		0		0
Gain on sale of land parcel	'		'		0		0
Net income	48,476		42,115		144,518		135,236
Net income attributable to noncontrolling interests	0		0		0		0
Dividends on preferred stock	0		0		0		0
Preferred stock redemption charge	'		'		'		0
Net income attributable to unvested restricted stock awards	0		0		0		0
Net income attributable to Alexandria’s common stockholders	48,476		42,115		144,518		135,236
Combined Non- Guarantor Subsidiaries	'		'		'		'
Revenues:	'		'		'		'
Rental	116,302		106,216		342,821		311,746
Tenant recoveries	38,757		34,006		110,291		97,769
Other income (loss)	3,965		3,209		11,636		16,095
Total revenues	159,024		143,431		464,748		425,610
Expenses:	'		'		'		'
Rental operations	47,742		44,203		139,289		126,758
General and administrative	4,720		6,300		12,644		13,034
Interest	5,933		5,307		18,121		16,780
Depreciation and amortization	47,630		44,859		137,354		135,330
Loss on early extinguishment of debt	0		'		0		0
Total expenses	106,025		100,669		307,408		291,902
(Loss) income from continuing operations before equity in earnings of affiliates	52,999		42,762		157,340		133,708
Equity in (income) loss related to subsidiaries	959		804		2,858		2,662
Income from continuing operations	53,958		43,566		160,198		136,370
(Loss) income from discontinued operations, net	-63		-605		646		6,195
Gain on sale of land parcel	'		'		772		1,864
Net income	53,895		42,961		161,616		144,429
Net income attributable to noncontrolling interests	960		828		2,922		2,390
Dividends on preferred stock	0		0		0		0
Preferred stock redemption charge	'		'		'		0
Net income attributable to unvested restricted stock awards	0		0		0		0
Net income attributable to Alexandria’s common stockholders	52,935		42,133		158,694		142,039
Eliminations	'		'		'		'
Revenues:	'		'		'		'
Rental	0		0		0		0
Tenant recoveries	0		0		0		0
Other income (loss)	-3,195		-3,417		-9,432		-9,940
Total revenues	-3,195		-3,417		-9,432		-9,940
Expenses:	'		'		'		'
Rental operations	0		0		0		0
General and administrative	-3,195		-3,417		-9,432		-9,940
Interest	0		0		0		0
Depreciation and amortization	0		0		0		0
Loss on early extinguishment of debt	0		'		0		0
Total expenses	-3,195		-3,417		-9,432		-9,940
(Loss) income from continuing operations before equity in earnings of affiliates	0		0		0		0
Equity in (income) loss related to subsidiaries	-101,411		-84,248		-303,212		-277,275
Income from continuing operations	-101,411		-84,248		-303,212		-277,275
(Loss) income from discontinued operations, net	0		0		0		0
Gain on sale of land parcel	'		'		0		0
Net income	-101,411		-84,248		-303,212		-277,275
Net income attributable to noncontrolling interests	0		0		0		0
Dividends on preferred stock	0		0		0		0
Preferred stock redemption charge	'		'		'		0
Net income attributable to unvested restricted stock awards	0		0		0		0
Net income attributable to Alexandria’s common stockholders	($101,411)		($84,248)		($303,212)		($277,275)
[1]	(Loss) income from discontinued operations, net, includes the results of operations for two operating properties that were classified as “held for sale” as of September 30, 2013, as well as the results of operations (prior to disposition) and (gain) loss on sale of real estate attributable to 10 properties sold during the period from January 1, 2012, to September 30, 2013.

Condensed_consolidating_financ4

Condensed consolidating financial information Comprehensive Income (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net income	$32,453	$18,305	$96,027	$76,721
Unrealized gains on marketable securities:	'	'	'	'
Unrealized gains (losses) on marketable securities:	-37	796	323	1,363
Reclassification adjustment for (gains) losses included in net income	-250	-1,421	-480	-2,107
Unrealized gains (losses) on marketable securities, net	-287	-625	-157	-744
Unrealized gains (losses) on interest rate swaps:	'	'	'	'
Unrealized interest rate swap gains (losses) arising during the period	-676	-2,818	-704	-9,982
Reclassification adjustment for amortization of interest expense included in net income	3,904	5,956	12,046	17,626
Unrealized gains (losses) on interest rate swaps, net	3,228	3,138	11,342	7,644
Foreign currency translation losses	-3,404	15,104	-26,461	7,871
Total other comprehensive (loss) income	-463	17,617	-15,276	14,771
Comprehensive income	31,990	35,922	80,751	91,492
Less: comprehensive income attributable to noncontrolling interests	-933	-805	-2,839	-2,379
Comprehensive income attributable to Alexandria’s common stockholders	31,057	35,117	77,912	89,113
Alexandria Real Estate Equities, Inc. (Issuer)	'	'	'	'
Net income	31,493	17,477	93,105	74,331
Unrealized gains on marketable securities:	'	'	'	'
Unrealized gains (losses) on marketable securities:	0	0	0	0
Reclassification adjustment for (gains) losses included in net income	0	0	0	0
Unrealized gains (losses) on marketable securities, net	0	0	0	0
Unrealized gains (losses) on interest rate swaps:	'	'	'	'
Unrealized interest rate swap gains (losses) arising during the period	-676	-2,818	-704	-9,982
Reclassification adjustment for amortization of interest expense included in net income	3,904	5,956	12,046	17,626
Unrealized gains (losses) on interest rate swaps, net	3,228	3,138	11,342	7,644
Foreign currency translation losses	0	0	0	0
Total other comprehensive (loss) income	3,228	3,138	11,342	7,644
Comprehensive income	34,721	20,615	104,447	81,975
Less: comprehensive income attributable to noncontrolling interests	0	0	0	0
Comprehensive income attributable to Alexandria’s common stockholders	34,721	20,615	104,447	81,975
Alexandria Real Estate Equities, L.P. (Guarantor Subsidiary)	'	'	'	'
Net income	48,476	42,115	144,518	135,236
Unrealized gains on marketable securities:	'	'	'	'
Unrealized gains (losses) on marketable securities:	-796	23	-391	10
Reclassification adjustment for (gains) losses included in net income	519	-11	144	172
Unrealized gains (losses) on marketable securities, net	-277	12	-247	182
Unrealized gains (losses) on interest rate swaps:	'	'	'	'
Unrealized interest rate swap gains (losses) arising during the period	0	0	0	0
Reclassification adjustment for amortization of interest expense included in net income	0	0	0	0
Unrealized gains (losses) on interest rate swaps, net	0	0	0	0
Foreign currency translation losses	0	0	0	0
Total other comprehensive (loss) income	-277	12	-247	182
Comprehensive income	48,199	42,127	144,271	135,418
Less: comprehensive income attributable to noncontrolling interests	0	0	0	0
Comprehensive income attributable to Alexandria’s common stockholders	48,199	42,127	144,271	135,418
Combined Non- Guarantor Subsidiaries	'	'	'	'
Net income	53,895	42,961	161,616	144,429
Unrealized gains on marketable securities:	'	'	'	'
Unrealized gains (losses) on marketable securities:	759	773	714	1,353
Reclassification adjustment for (gains) losses included in net income	-769	-1,410	-624	-2,279
Unrealized gains (losses) on marketable securities, net	-10	-637	90	-926
Unrealized gains (losses) on interest rate swaps:	'	'	'	'
Unrealized interest rate swap gains (losses) arising during the period	0	0	0	0
Reclassification adjustment for amortization of interest expense included in net income	0	0	0	0
Unrealized gains (losses) on interest rate swaps, net	0	0	0	0
Foreign currency translation losses	-3,404	15,104	-26,461	7,871
Total other comprehensive (loss) income	-3,414	14,467	-26,371	6,945
Comprehensive income	50,481	57,428	135,245	151,374
Less: comprehensive income attributable to noncontrolling interests	-933	-805	-2,839	-2,379
Comprehensive income attributable to Alexandria’s common stockholders	49,548	56,623	132,406	148,995
Eliminations	'	'	'	'
Net income	-101,411	-84,248	-303,212	-277,275
Unrealized gains on marketable securities:	'	'	'	'
Unrealized gains (losses) on marketable securities:	0	0	0	0
Reclassification adjustment for (gains) losses included in net income	0	0	0	0
Unrealized gains (losses) on marketable securities, net	0	0	0	0
Unrealized gains (losses) on interest rate swaps:	'	'	'	'
Unrealized interest rate swap gains (losses) arising during the period	0	0	0	0
Reclassification adjustment for amortization of interest expense included in net income	0	0	0	0
Unrealized gains (losses) on interest rate swaps, net	0	0	0	0
Foreign currency translation losses	0	0	0	0
Total other comprehensive (loss) income	0	0	0	0
Comprehensive income	-101,411	-84,248	-303,212	-277,275
Less: comprehensive income attributable to noncontrolling interests	0	0	0	0
Comprehensive income attributable to Alexandria’s common stockholders	($101,411)	($84,248)	($303,212)	($277,275)

Condensed_consolidating_financ5

Condensed consolidating financial information Cash Flows (Details) (USD $)

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

1 Months Ended

In Thousands, unless otherwise specified

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Alexandria Real Estate Equities, Inc. (Issuer)

Alexandria Real Estate Equities, Inc. (Issuer)

Alexandria Real Estate Equities, Inc. (Issuer)

Alexandria Real Estate Equities, Inc. (Issuer)

Alexandria Real Estate Equities, L.P. (Guarantor Subsidiary)

Alexandria Real Estate Equities, L.P. (Guarantor Subsidiary)

Alexandria Real Estate Equities, L.P. (Guarantor Subsidiary)

Alexandria Real Estate Equities, L.P. (Guarantor Subsidiary)

Combined Non- Guarantor Subsidiaries

Combined Non- Guarantor Subsidiaries

Combined Non- Guarantor Subsidiaries

Combined Non- Guarantor Subsidiaries

Eliminations

Eliminations

Eliminations

Eliminations

Unsecured Bank Term Loan 2016

Operating Activities

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net income

$32,453

$18,305

$96,027

$76,721

$31,493

$17,477

$93,105

$74,331

$48,476

$42,115

$144,518

$135,236

$53,895

$42,961

$161,616

$144,429

($101,411)

($84,248)

($303,212)

($277,275)

'

Adjustments to reconcile net income to net cash provided by operating activities:

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Depreciation and amortization

'

'

142,677

143,933

'

'

4,393

3,781

'

'

0

0

'

'

138,284

140,152

'

'

0

0

'

Loss on early extinguishment of debt

1,432

0

1,992

2,225

1,432

'

1,992

2,225

0

'

0

0

0

'

0

0

0

'

0

0

1,400

Gain on sale of land parcel

0

0

-772

-1,864

'

'

0

0

'

'

0

0

'

'

-772

-1,864

'

'

0

0

'

Loss (gain) on sale of real estate

0

-1,562

121

-1,564

'

'

0

0

'

'

0

0

'

'

121

-1,564

'

'

0

0

'

Non-cash impairment of real estate

'

'

0

9,799

'

'

'

4,799

'

'

'

'

'

'

'

5,000

'

'

'

'

'

Amortization of loan fees and costs

'

'

7,300

7,327

'

'

5,148

5,307

'

'

0

0

'

'

2,152

2,020

'

'

0

0

'

Amortization of debt premiums/discounts

'

'

383

401

'

'

75

104

'

'

0

0

'

'

308

297

'

'

0

0

'

Amortization of acquired above and below market leases

'

'

-2,490

-2,356

'

'

0

0

'

'

0

0

'

'

-2,490

-2,356

'

'

0

0

'

Deferred rent

'

'

-20,007

-19,216

'

'

0

164

'

'

0

0

'

'

-20,007

-19,380

'

'

0

0

'

Stock compensation expense

'

'

11,541

10,412

'

'

11,541

10,412

'

'

0

0

'

'

0

0

'

'

0

0

'

Equity in loss related to investments

'

'

0

-26

'

'

'

0

'

'

'

-26

'

'

'

0

'

'

'

0

'

Equity in (income) loss related to subsidiaries

0

0

0

0

51,975

41,380

155,694

140,267

48,477

42,064

144,660

134,346

959

804

2,858

2,662

-101,411

-84,248

-303,212

-277,275

'

Gain on sales of investments

'

'

-4,716

-12,316

'

'

0

0

'

'

-152

-1,109

'

'

-4,564

-11,207

'

'

0

0

'

Loss on sales of investments

'

'

529

1,607

'

'

0

0

'

'

298

195

'

'

231

1,412

'

'

0

0

'

Changes in operating assets and liabilities:

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Restricted cash

'

'

1,243

441

'

'

-8

-8

'

'

0

0

'

'

1,251

449

'

'

0

0

'

Tenant receivables

'

'

-271

-2,637

'

'

1

11

'

'

0

0

'

'

-272

-2,648

'

'

0

0

'

Deferred leasing costs

'

'

-37,190

-23,597

'

'

2,421

4,232

'

'

0

0

'

'

-39,611

-27,829

'

'

0

0

'

Other assets

'

'

-11,428

-3,230

'

'

-5,570

2,603

'

'

0

0

'

'

-5,858

-5,833

'

'

0

0

'

Intercompany receivables and payables

'

'

0

0

'

'

3,021

-49

'

'

0

0

'

'

-3,021

49

'

'

0

0

'

Accounts payable, accrued expenses, and tenant security deposits

'

'

51,437

41,378

'

'

-9,599

3,592

'

'

0

0

'

'

61,036

37,786

'

'

0

0

'

Net cash provided by operating activities

'

'

236,376

227,490

'

'

-49,174

-28,763

'

'

4

2

'

'

285,546

256,251

'

'

0

0

'

Investing Activities

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from sale of properties

'

'

101,815

36,179

'

'

10,796

0

'

'

0

0

'

'

91,019

36,179

'

'

0

0

'

Additions to properties

'

'

-450,140

-406,066

'

'

3,539

-1,192

'

'

0

0

'

'

-453,679

-404,874

'

'

0

0

'

Purchase of properties

'

'

-24,537

-42,171

'

'

0

0

'

'

0

0

'

'

-24,537

-42,171

'

'

0

0

'

Change in restricted cash related to construction projects

'

'

5,711

-11,453

'

'

0

0

'

'

0

0

'

'

5,711

-11,453

'

'

0

0

'

Distribution from unconsolidated real estate entity

'

'

0

22,250

'

'

'

0

'

'

'

0

'

'

'

22,250

'

'

'

0

'

Contributions to unconsolidated real estate entity

'

'

-13,881

-5,042

'

'

0

0

'

'

0

0

'

'

-13,881

-5,042

'

'

0

0

'

Investments in subsidiaries

'

'

0

0

'

'

-126,967

-147,782

'

'

-170,033

-112,504

'

'

-3,045

-389

'

'

300,045

260,675

'

Additions to investments

'

'

-22,835

-21,997

'

'

0

0

'

'

0

-160

'

'

-22,835

-21,837

'

'

0

0

'

Proceeds from investments

'

'

12,750

19,905

'

'

0

0

'

'

1,594

1,944

'

'

11,156

17,961

'

'

0

0

'

Net cash used in investing activities

'

'

-391,117

-408,395

'

'

-112,632

-148,974

'

'

-168,439

-110,720

'

'

-410,091

-409,376

'

'

300,045

260,675

'

Financing Activities

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Borrowings from secured notes payable

'

'

26,319

2,874

'

'

0

0

'

'

0

0

'

'

26,319

2,874

'

'

0

0

'

Repayments of borrowings from secured notes payable

'

'

-34,120

-8,125

'

'

0

0

'

'

0

0

'

'

-34,120

-8,125

'

'

0

0

'

Proceeds from issuance of unsecured senior notes payable

'

'

498,561

549,533

'

'

498,561

549,533

'

'

0

0

'

'

0

0

'

'

0

0

'

Principal borrowings from unsecured senior line of credit

'

'

319,000

623,147

'

'

319,000

623,147

'

'

0

0

'

'

0

0

'

'

0

0

'

Repayments of borrowings from unsecured senior line of credit

'

'

-871,000

-580,147

'

'

-871,000

-580,147

'

'

0

0

'

'

0

0

'

'

0

0

'

Repayment of unsecured senior bank term loan

'

'

-250,000

-250,000

'

'

-250,000

-250,000

'

'

0

0

'

'

0

0

'

'

0

0

-100,000

Repurchase of unsecured senior convertible notes

'

'

-384

-84,801

'

'

-384

-84,801

'

'

0

0

'

'

0

0

'

'

0

0

'

Redemption of Series C Cumulative Redeemable Preferred Stock

'

'

0

-129,638

'

'

'

-129,638

'

'

'

0

'

'

'

0

'

'

'

0

'

Proceeds from issuance of Series E Cumulative Redeemable Preferred Stock

'

'

0

124,868

'

'

'

124,868

'

'

'

0

'

'

'

0

'

'

'

0

'

Transfers due to/from parent company

'

'

0

0

'

'

0

0

'

'

166,522

110,718

'

'

133,523

149,957

'

'

-300,045

-260,675

'

Change in restricted cash related to financings

'

'

923

-10,476

'

'

-1

0

'

'

0

0

'

'

924

-10,476

'

'

0

0

'

Deferred financing costs paid

'

'

-16,247

-25,301

'

'

-14,175

-19,949

'

'

0

0

'

'

-2,072

-5,352

'

'

0

0

'

Proceeds from common stock offering

'

'

535,686

98,443

'

'

535,686

98,443

'

'

0

0

'

'

0

0

'

'

0

0

'

Proceeds from exercise of stock options

'

'

0

155

'

'

'

155

'

'

'

0

'

'

'

0

'

'

'

0

'

Dividends paid on common stock

'

'

-120,367

-92,743

'

'

-120,367

-92,743

'

'

0

0

'

'

0

0

'

'

0

0

'

Dividends paid on preferred stock

'

'

-19,414

-21,348

'

'

-19,414

-21,348

'

'

0

0

'

'

0

0

'

'

0

0

'

Distributions to redeemable noncontrolling interests

'

'

0

-943

'

'

'

0

'

'

'

0

'

'

'

-943

'

'

'

0

'

Redemption of redeemable noncontrolling interests

'

'

0

-150

'

'

'

4

'

'

'

0

'

'

'

-154

'

'

'

0

'

Contributions by noncontrolling interests

'

'

0

1,626

'

'

'

0

'

'

'

0

'

'

'

1,626

'

'

'

0

'

Distributions to noncontrolling interests

'

'

-2,100

-770

'

'

0

0

'

'

0

0

'

'

-2,100

-770

'

'

0

0

'

Net cash provided by financing activities

'

'

66,857

196,204

'

'

77,906

217,524

'

'

166,522

110,718

'

'

122,474

128,637

'

'

-300,045

-260,675

'

Effect of foreign exchange rate changes on cash and cash equivalents

'

'

752

1,066

'

'

0

0

'

'

0

0

'

'

752

1,066

'

'

0

0

'

Net increase (decrease) in cash and cash equivalents

'

'

-87,132

16,365

'

'

-83,900

39,787

'

'

-1,913

0

'

'

-1,319

-23,422

'

'

0

0

'

Cash and cash equivalents at beginning of period

'

'

140,971

78,539

'

'

98,567

10,608

'

'

1,913

0

'

'

40,491

67,931

'

'

0

0

'

Cash and cash equivalents at end of period

53,839

94,904

53,839

94,904

14,667

50,395

14,667

50,395

0

0

0

0

39,172

44,509

39,172

44,509

0

0

0

0

'

Supplemental Disclosure of Cash Flow Information

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Cash paid during the period for interest, net of interest capitalized

'

'

34,281

30,485

'

'

16,569

23,226

'

'

0

0

'

'

17,712

7,259

'

'

0

0

'

Non-Cash Investing Activities

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Note receivable from sale of real estate

'

'

$38,820

$6,125

'

'

$29,820

$0

'

'

$0

$0

'

'

$9,000

$6,125

'

'

$0

$0

'