NET (LOSS) INCOME PER SHARE (Tables)
 12 Months Ended
Dec. 31, 2013
NET (LOSS) INCOME PER SHARE [Abstract]  
Components of denominator for calculation of basic net (loss) income per share and diluted net (loss) income per share
The components of the denominator for the calculation of basic net (loss) income per share and diluted net (loss) income per share are as follows:

 
Years Ended December 31,
 
 
2013
  
2012
  
2011
 
 
 
  
  
 
Common shares outstanding, basic:
 
  
  
 
Weighted-average common shares outstanding, basic
  
43,249,070
   
41,727,075
   
35,179,244
 
 
            
Common shares outstanding, diluted:
            
Weighted-average common shares outstanding, basic
  
43,249,070
   
41,727,075
   
35,179,244
 
 
            
Dilutive effect of convertible notes
  
—
   
—
   
—
 
 
            
Dilutive effect of restricted stock awards
  
—
   
—
   
78,961
 
 
            
Weighted-average common shares outstanding, diluted
  
43,249,070
   
41,727,075
   
35,258,205
 
Reconciliation of net (loss) income attributable to GS&T and net (loss) income attributable to GS&T for diluted earnings per share
The following table sets forth a reconciliation of the net (loss) income attributable to GS&T and the net (loss) income attributable to GS&T for diluted net (loss) income per share under the “if-converted” method:

 
 
Years Ended December 31,
 
 
 
2013
  
2012
  
2011
 
 
 
  
  
 
Net (loss) income attributable to GS&T
 
$
(147,741
)
 
$
(144,928
)
 
$
25,386
 
 
            
Interest expense related to convertible notes, if dilutive
  
—
   
—
   
—
 
 
            
Net (loss) income attributable to GS&T for the computation of diluted net (loss) income per share
$
(147,741
)$
(144,928
)$
25,386