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Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2018
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The reconciliation of basic and diluted earnings per share for each period presented was as follows (dollars and shares in thousands, except per share amounts):
 
Year ended December 31,
 
2018
 
2017
 
2016
Net loss attributable to common stockholders
$
(374,080
)
 
$
(59,400
)
 
$
(81,978
)
 
 
 
 
 
 
Basic - weighted average shares outstanding
108,771

 
98,689

 
91,226

Dilutive effect of stock options and restricted stock
—

 
—

 
—

Diluted - weighted average shares outstanding
108,771

 
98,689

 
91,226

 
 
 
 
 
 
Loss per share
 
 
 
 
 
Basic
$
(3.44
)
 
$
(0.60
)
 
$
(0.90
)
Diluted
$
(3.44
)
 
$
(0.60
)
 
$
(0.90
)