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Earnings per share (Tables)
 6 Months Ended
Jun. 30, 2014
Earnings per share  
Computation of Net Loss per Share on Basic and Diluted Basis

The following table reflects the computation of net loss per share on a basic and diluted basis for the three and six months ended June 30, 2014 and 2013 (in thousands, except share information):

 
   For the Three Months Ended June 30,   For the Six Months Ended June 30,  
 
   2014   2013   2014   2013  

Income / (loss) (numerator):

                          

Loss from continuing operations

   $ (3,369 ) $ 137   $ (10,304 ) $ (6,742 )

Income from discontinued operations

     —     986     —     1,008  

Noncontrolling interest

     4,212     4,664     7,832     5,559  

Dividends on preferred shares

     4,669     —     7,790     —  

Conversion of preferred units

     —     10,456     —     10,456  
                   
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

Net loss attributable to common shareholders

   $ (12,250 ) $ (13,997 ) $ (25,926 ) $ (21,749 )
                   
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​
                   

Weighted-average shares (denominator)

    
185,515,651		    
95,971,706		    
185,510,004		    
72,234,717		  

Net loss per share—basic and diluted:

    
 		    
 		    
 		    
 		  

Loss from continuing operations

   $ (0.07 ) $ (0.16 ) $ (0.14 ) $ (0.31 )

Income from discontinued operations

     —     0.01     —     0.01  
                   
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

Net loss per share—basic and diluted

   $ (0.07 ) $ (0.15 ) $ (0.14 ) $ (0.30 )
                   
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​