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Stockholders' equity (Tables)
 12 Months Ended
Dec. 31, 2013
Stockholders' Equity Note [Abstract]  
Accumulated other comprehensive loss attributable to Alexandria Real Estate Equities, Inc.
Accumulated other comprehensive loss attributable to Alexandria Real Estate Equities, Inc. consists of the following (in thousands):
 
Unrealized Gain on Marketable Securities
 
Unrealized Loss on Interest Rate
Swap Agreements
 
Unrealized Loss on Foreign Currency Translation
 
Total
Balance as of December 31, 2012
$
1,473

 
$
(20,661
)
 
$
(5,645
)
 
$
(24,833
)
Other comprehensive income (loss) before reclassifications
1,300

 
1,918

 
(28,828
)
 
(25,610
)
Amounts reclassified from other comprehensive income
(1,183
)
 
15,422

 
—

 
14,239

Net other comprehensive (loss) income
117

 
17,340

 
(28,828
)
 
(11,371
)
Balance as of December 31, 2013
$
1,590

 
$
(3,321
)
 
$
(34,473
)
 
$
(36,204
)