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Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2017
Earnings Per Share [Abstract]  
Schedule of earning per share, basic and diluted, by common shares
The following table sets forth the computation of basic and diluted net income (loss) per share for three years ended December 31, 2017:
 
2017
 
2016
 
2015
 
(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
$
263,484

 
$
(112,052
)
 
$
(556,334
)
Less: Undistributed earnings allocated to participating securities
(293
)
 
—

 
—

Net income (loss) attributable to Vertex common shareholders—basic
$
263,191

 
$
(112,052
)
 
$
(556,334
)
 
 
 
 
 
 
Basic weighted-average common shares outstanding
248,858

 
244,685

 
241,312

Basic net income (loss) attributable to Vertex per common share
$
1.06

 
$
(0.46
)
 
$
(2.31
)
 
 
 
 
 
 
Diluted net income (loss) attributable to Vertex per common share calculation:
 
 
 
 
 
Net income (loss) attributable to Vertex common shareholders
$
263,484

 
$
(112,052
)
 
$
(556,334
)
Less: Undistributed earnings allocated to participating securities
(288
)
 
—

 
—

Net income (loss) attributable to Vertex common shareholders—diluted
$
263,196

 
$
(112,052
)
 
$
(556,334
)
 
 
 
 
 
 
Weighted-average shares used to compute basic net income (loss) per common share
248,858

 
244,685

 
241,312

Effect of potentially dilutive securities:
 
 
 
 
 
Stock options
2,797

 
—

 
—

Restricted stock and restricted stock units (including PSUs)
1,542

 
—

 
—

Employee stock purchase plan
28

 
—

 
—

Weighted-average shares used to compute diluted net income (loss) per common share
253,225

 
244,685

 
241,312

Diluted net income (loss) attributable to Vertex per common share
$
1.04

 
$
(0.46
)
 
$
(2.31
)
Schedule of antidilutive securities excluded from computation of earnings per share
The Company did not include the securities in the following table in the computation of the net income (loss) per share attributable to Vertex common shareholders calculations because the effect would have been anti-dilutive during each period.
 
2017
 
2016
 
2015
 
(in thousands)
Stock options
3,554

 
12,642

 
11,145

Unvested restricted stock and restricted stock units (including PSUs)
411

 
3,546

 
3,024