Stockholders' equity (Tables)

6 Months Ended

Jun. 30, 2012

Stockholders' equity

Accumulated other comprehensive loss attributable to Alexandria Real Estate Equities, Inc.

	June 30,			December 31,
	2012			2011
Unrealized gain on marketable securities	$	3,715		$	3,834
Unrealized loss on interest rate swap agreements	(28,474		)	(32,980		)
Unrealized loss on foreign currency translation	(12,611		)	(5,365		)
Total	$	(37,370	)	$	(34,511	)