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Earnings Per Share
 3 Months Ended
Mar. 31, 2019
Earnings Per Share [Abstract]  
Earnings Per Share Earnings Per Share
The calculation of basic and diluted earnings per share for each period presented was as follows (dollars and shares in thousands, except per share amounts):
 
Three Months Ended
March 31,
 
2019
 
2018
Net income (loss)
$
(7,888
)
 
$
28,066

 
 
 
 
Basic - weighted average shares outstanding
109,643

 
108,423

Dilutive effect of stock options and restricted stock
—

 
2,434

Diluted - weighted average shares outstanding
109,643

 
110,857

 
 
 
 
Earnings (loss) per share
 
 
 
Basic
$
(0.07
)
 
$
0.26

Diluted
$
(0.07
)
 
$
0.25


The calculation of diluted earnings per share excludes approximately 3.3 million shares that were anti-dilutive for the three months ended March 31, 2018. The calculation of diluted loss per share excludes all potentially dilutive shares for the three months ended March 31, 2019 because there was a net loss for the period.