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Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2018
Earnings Per Share [Abstract]  
Net Income Per Share Basic And Diluted
The following table sets forth the computation of basic and diluted net income per share (in thousands, except per share information):
 
Year Ended December 31,
 
2018
 
2017
 
2016
Numerator:
 
 
 
 
 
Income from continuing operations
$
575,667

 
$
21,985

 
$
469,855

(Loss) income from discontinued operations, net of income taxes
—

 
(42,704
)
 
66,257

Net income (loss)
$
575,667

 
$
(20,719
)
 
$
536,112

Denominator:
 
 
 
 
 
Denominator for basic earnings per share - weighted-average shares outstanding
136,030

 
150,779

 
155,134

Effect of dilutive employee stock awards
2,653

 
2,493

 
1,950

Effect of dilutive Convertible Notes
5,769

 
2,231

 
—

Effect of dilutive warrants
1,482

 
—

 
—

Denominator for diluted earnings per share - weighted-average shares outstanding
145,934

 
155,503

 
157,084

 
 
 
 
 
 
Basic earnings (loss) per share:
 
 
 
 
 
Income from continuing operations
$
4.23

 
$
0.15

 
$
3.03

(Loss) income from discontinued operations, net of income taxes
—

 
(0.28
)
 
0.43

Basic net earnings (loss) per share
$
4.23

 
$
(0.13
)
 
$
3.46

 
 
 
 
 
 
Diluted earnings (loss) per share:
 
 
 
 
 
Income from continuing operations
$
3.94

 
$
0.14

 
$
2.99

(Loss) income from discontinued operations, net of income taxes
—

 
(0.27
)
 
0.42

Diluted net earnings (loss) per share:
$
3.94

 
$
(0.13
)
 
$
3.41