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Net Income (Loss) Per Share Attributable to Vertex Common Shareholders (Tables)
 3 Months Ended
Jun. 30, 2013
Earnings Per Share [Abstract]  
Calculation of net income (loss) per basic and diluted share
The following table sets forth the computation of basic and diluted net income (loss) attributable to Vertex per common share in conformity with the two-class method for the three and six months ended June 30, 2013 and 2012:
 
Three Months Ended
June 30,
 
Six Months Ended
June 30,
 
2013
 
2012
 
2013
 
2012
 
(in thousands, except per share amounts)
Basic net income (loss) attributable to Vertex per common share calculation:
 
 
 
 
 
 
 
Net income (loss) attributable to Vertex common shareholders
$
(57,165
)
 
$
(64,931
)
 
$
(365,181
)
 
$
26,659

Less: Undistributed earnings allocated to participating securities
—

 
—

 
—

 
(260
)
Net income (loss) attributable to Vertex common shareholders—basic
$
(57,165
)
 
$
(64,931
)
 
$
(365,181
)
 
$
26,399

Basic weighted-average common shares outstanding
222,053

 
211,344

 
218,795

 
209,681

Basic net income (loss) attributable to Vertex per common share
$
(0.26
)
 
$
(0.31
)
 
$
(1.67
)
 
$
0.13

 
 
 
 
 
 
 
 
Diluted net income (loss) attributable to Vertex per common share calculation:
 
 
 
 
 
 
 
Net income (loss) attributable to Vertex common shareholders
$
(57,165
)
 
$
(64,931
)
 
$
(365,181
)
 
$
26,659

Less: Undistributed earnings allocated to participating securities
—

 
—

 
—

 
(256
)
Net income (loss) attributable to Vertex common shareholders—diluted
$
(57,165
)
 
$
(64,931
)
 
$
(365,181
)
 
$
26,403

Weighted-average shares used to compute basic net income (loss) per common share
222,053

 
211,344

 
218,795

 
209,681

Effect of potentially dilutive securities:
 
 
 
 
 
 
 
Stock options
—

 
—

 
—

 
3,188

Other
—

 
—

 
—

 
88

Weighted-average shares used to compute diluted net income (loss) per common share
222,053

 
211,344

 
218,795

 
212,957

Diluted net income (loss) attributable to Vertex per common share
$
(0.26
)
 
$
(0.31
)
 
$
(1.67
)
 
$
0.12
Potential gross common equivalent shares
The Company did not include the securities described in the following table in the computation of the diluted net income (loss) attributable to Vertex per common share calculations because the effect would have been anti-dilutive during each such period:
 
Three Months Ended
June 30,
 
Six Months Ended
June 30,
 
2013
 
2012
 
2013
 
2012
 
(in thousands)
 
(in thousands)
Stock options
16,802

 
18,771

 
16,802

 
10,624

Convertible senior subordinated notes
—

 
8,192

 
—

 
8,192

Unvested restricted stock and restricted stock units
2,600

 
2,087

 
2,600

 
8