Condensed Consolidated Balance Sheets (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Assets
Investments in real estate	$ 6,534,433	$ 6,060,821
Less: accumulated depreciation	(679,081)	(616,007)
Investments in real estate, net	5,855,352	5,444,814
Cash and cash equivalents	60,925	91,232
Restricted cash	23,432	28,354
Tenant receivables	4,487	5,492
Deferred rent	125,867	116,849
Investments	88,862	83,899
Other assets	184,359	135,221
Total assets	6,343,284	5,905,861
Liabilities, Noncontrolling Interests, and Equity
Secured notes payable	774,691	790,869
Unsecured line of credit and unsecured term loans	1,575,000	1,498,000
Unsecured convertible notes	203,638	295,293
Accounts payable, accrued expenses, and tenant security deposits	300,030	304,257
Dividends payable	34,068	31,114
Total liabilities	2,887,427	2,919,533
Redeemable noncontrolling interests	15,899	15,920
Alexandria Real Estate Equities, Inc.'s stockholders' equity:
Series C preferred stock	129,638	129,638
Series D convertible preferred stock	250,000	250,000
Common stock	614	550
Additional paid-in capital	3,024,603	2,566,238
Retained earnings		734
Accumulated other comprehensive loss	(6,272)	(18,335)
Alexandria Real Estate Equities, Inc.'s stockholders' equity	3,398,583	2,928,825
Noncontrolling interests	41,375	41,583
Total equity	3,439,958	2,970,408
Total liabilities, noncontrolling interests, and equity	$ 6,343,284	$ 5,905,861

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-Name Statement of Financial Accounting Standard (FAS)
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-Publisher FASB
-Name Accounting Standards Codification
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-Name Regulation S-X (SX)
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The cumulative amount of depreciation for real estate property held for investment purposes.

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-Publisher SEC
-Name Regulation S-X (SX)
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The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. For a classified balance sheet represents the current portion only (the noncurrent portion has a separate concept); there is a separate and distinct element for unclassified presentations.

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-Paragraph 1
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-Name Audit and Accounting Guide (AAG)
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-Chapter 4
-Paragraph 80
-Subparagraph Exhibit 4-8, 3
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The cumulative amount of the reporting entity's undistributed earnings or deficit.

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Carrying value as of the balance sheet date , including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

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-Publisher SEC
-Name Regulation S-X (SX)
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.16)
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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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Total of Stockholders' Equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity including portions attributable to both the parent and noncontrolling interests (previously referred to as minority interest), if any. The entity including portions attributable to the parent and noncontrolling interests is sometimes referred to as the economic entity. This excludes temporary equity and is sometimes called permanent equity.

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-Publisher FASB
-Name Accounting Standards Codification
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-Name Accounting Research Bulletin (ARB)
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-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
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-Publisher AICPA
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- Definition

The aggregate amount to be paid by the entity upon redemption of the security that is classified as temporary equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
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-Subparagraph b

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-Publisher FASB
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