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Earnings Per Share
 6 Months Ended
Jun. 30, 2019
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,
 
2019
 
2018
 
2019
 
2018
Numerator:
 
 
 
 
 
 
 
Earnings (loss) from continuing operations - basic
$
(26,632
)
 
$
24,464

 
$
(3,998
)
 
$
40,146

Gain from stock warrants revaluation, net of tax
—

 
(10,448
)
 
—

 
(7,473
)
Earnings (loss) from continuing operations - diluted
$
(26,632
)
 
$
14,016

 
$
(3,998
)
 
$
32,673

 
 
 
 
 
 
 
 
Denominator:
 
 
 
 
 
 
 
Weighted-average shares outstanding for basic earnings per share
58,909

 
58,739

 
58,874

 
58,790

Common equivalent shares:
 
 
 
 
 
 
 
Effect of stock-based compensation awards and warrants
—

 
9,624

 
—

 
9,994

Weighted-average shares outstanding assuming dilution
58,909

 
68,363

 
58,874

 
68,784

Basic earnings (loss) per share from continuing operations
$
(0.45
)
 
$
0.42

 
$
(0.07
)
 
$
0.68

Diluted earnings (loss) per share from continuing operations
$
(0.45
)
 
$
0.21

 
$
(0.07
)
 
$
0.48


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 C), 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, 2019 and 2018 would have resulted in 39.5 million and 14.8 million additional shares of the Company's common stock, respectively, if the warrants were 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 10.9 million and 10.8 million for the three and six month periods ended June 30, 2019, respectively.