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Earnings per Share (Tables)
 12 Months Ended
Dec. 31, 2016
Earnings Per Share [Abstract]  
Computation of Basic and Diluted Net Income (Loss) Per Share
The following table sets forth the computation of basic and diluted earnings per share:
 
 
Years ended December 31:
 
 
2014
 
2015
 
2016
 
 
(In thousands, except per share data)
Numerator:
 
 
 
 
 
 
Net income (loss) from continuing operations
 
$
61,951

 
$
(127,090
)
 
$
(96,378
)
Net income (loss) from discontinued operations
 
1,318

 
(20
)
 
—

 
 
$
63,269

 
$
(127,110
)
 
$
(96,378
)
Denominator:
 
 

 
 

 
 

Denominator for basic earnings per share – weighted-average common shares outstanding
 
98,835

 
104,605

 
122,132

Effect of dilutive securities:
Stock options and restricted shares
 
2,633

 
—

 
—

Denominator for diluted earnings per share – adjusted weighted-average shares and assumed exercise of options and restricted shares
 
101,468

 
104,605

 
122,132

 
 
 
 
 
 
 
Net income (loss) per common share - basic
 
 
 
 
 
 
Continuing operations
 
$
0.63

 
$
(1.21
)
 
$
(0.79
)
Discontinued operations
 
0.01

 
—

 
—

 
 
$
0.64

 
$
(1.21
)
 
$
(0.79
)
 
 
 
 
 
 
 
Net income (loss) per common share - diluted
 
 
 
 
 
 
Continuing operations
 
$
0.61

 
$
(1.21
)
 
$
(0.79
)
Discontinued operations
 
0.01

 
—

 
—

 
 
$
0.62

 
$
(1.21
)
 
$
(0.79
)