Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
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