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Noncontrolling interests Noncontrolling Interests (Tables)
 12 Months Ended
Dec. 31, 2014
Noncontrolling Interests [Abstract]  
Income from continuing operations and discontinued operations attributable to Alexandria Real Estate Equities, Inc. excluding amounts attributable to noncontrolling interests [Table Text Block]
The following table represents income from continuing operations and discontinued operations attributable to Alexandria for the years ended December 31, 2014, 2013, and 2012, excluding the amounts attributable to these noncontrolling interests:
 
 
Year Ended December 31,
 
 
2014
 
2013
 
2012
Income from continuing operations attributable to Alexandria
 
$
100,341

 
$
135,317

 
$
93,310

Income from discontinued operations
 
$
1,233

 
$
900

 
$
8,816