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Computation of Earnings (Loss) Per Share Schedule of Earnings (Loss) Per Share (Tables)
3 Months Ended
Mar. 31, 2018
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The following table reconciles net income and the weighted-average shares used in computing basic and diluted earnings per share in the respective periods (in thousands):
 
Three months ended 
 March 31,
 
2018
 
2017
Numerator:
 
 
 
Net income used for basic earnings per share
$
33,958

 
$
14,290

Interest expense on Convertible Senior Notes, net of tax
2,144

 

Net income used for diluted earnings per share, if-converted method
$
36,102

 
$
14,290

 
 
 
 
Basic weighted-average common shares outstanding
35,236

 
33,202

Potentially dilutive shares issuable from Convertible Senior Notes, if-converted
4,957

 

Potentially dilutive shares issuable from stock options and unvested RSUs
1,755

 
796

Diluted weighted-average common shares outstanding, if-converted
41,948

 
33,998

Potentially dilutive shares excluded from calculation due to anti-dilutive effect
193

 
1,972