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Earnings Per Share
 6 Months Ended
Jun. 30, 2018
Earnings Per Share [Abstract]  
Earnings Per Share
COMMON STOCK AND EARNINGS PER SHARE
Earnings per Share
The calculation of basic and diluted earnings per common share are as follows (in thousands, except per share amounts):
 
Three Months Ending
 
Six Months Ending
 
June 30,
 
June 30,
 
2018
 
2017
 
2018
 
2017
Numerator:
 
 
 
 
 
 
 
Earnings (loss) from continuing operations - basic
$
24,464

 
$
(53,918
)
 
$
40,146

 
$
(44,122
)
Gain from stock warrants revaluation, net of tax
(10,448
)
 
—

 
(7,473
)
 
—

Earnings (loss) from continuing operations - diluted
$
14,016

 
$
(53,918
)
 
$
32,673

 
$
(44,122
)
 
 
 
 
 
 
 
 
Denominator:
 
 
 
 
 
 
 
Weighted-average shares outstanding for basic earnings per share
58,739

 
59,035

 
58,790

 
59,084

Common equivalent shares:
 
 
 
 
 
 
 
Effect of stock-based compensation awards and warrants
9,624

 
—

 
9,994

 
—

Weighted-average shares outstanding assuming dilution
68,363

 
59,035

 
68,784

 
59,084

Basic earnings per share from continuing operations
$
0.42

 
$
(0.91
)
 
$
0.68

 
$
(0.75
)
Diluted earnings per share from continuing operations
$
0.21

 
$
(0.91
)
 
$
0.48

 
$
(0.75
)

The determination of diluted earnings per share requires the exclusion of the fair value re-measurement of the stock warrants recorded as a liability (see Note B), if such warrants have a anti-dilutive effect on earnings per share. The dilutive effect of the weighted-average diluted shares outstanding is calculated using the treasury method for periods in which equivalent shares have a dilutive effect on earnings per share. Under this method, the number of diluted shares is determined by dividing the assumed proceeds of the warrants recorded as a liability by the average stock price during the period and comparing that amount with the number of corresponding warrants outstanding.
The underlying warrants recorded as a liability as of June 30, 2017, could result in 13.6 million additional shares of the Company's common stock if the warrants are settled by tendering cash. The number of equivalent shares that were not included in weighted average shares outstanding assuming dilution, because their effect would have been anti-dilutive, were 8.5 million and 7.2 million for the three and six month periods ended June 30, 2017, respectively.