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Net Income (Loss) Per Common Share (Tables)
 12 Months Ended
Dec. 31, 2015
Earnings Per Share [Abstract]  
Calculation of Diluted Net Income (Loss) Per Common Share

The following table reconciles the numerator and denominator used to calculate diluted net income (loss) per common share:

 

 

 

Years Ended December 31,

 

 

 

2015

 

 

2014

 

 

2013

 

Numerator:

 

 

 

 

 

 

 

 

 

 

 

 

Net income (loss)

 

$

244,725

 

 

$

276,452

 

 

$

(42,613

)

Interest expense on convertible notes, net of tax

 

 

3,629

 

 

 

14,030

 

 

 

—

 

Numerator for diluted net income (loss) per common

   share calculation

 

$

248,354

 

 

$

290,482

 

 

$

(42,613

)

Denominator:

 

 

 

 

 

 

 

 

 

 

 

 

Weighted-average common shares, basic

 

 

160,345

 

 

 

153,859

 

 

 

150,331

 

Dilutive effect of common stock equivalents

 

 

8,979

 

 

 

16,142

 

 

 

—

 

Weighted-average common shares, diluted

 

 

169,324

 

 

 

170,001

 

 

 

150,331