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Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2018
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share
 
The computation of basic and diluted (loss) earnings per common share for the years ended December 31, 2018, 2017 and 2016, is as follows (in thousands, except per share amounts):
 
Year Ended December 31,
 
2018
 
2017
 
2016
Numerator:
 
 
 
 
 
Net (loss) income
$
(76,171
)
 
$
16,430

 
$
3,949

 
 
 
 
 
 
Denominator:
 

 
 

 
 

Denominator for basic (loss) earnings per share—weighted-average shares outstanding
52,230

 
53,851

 
53,607

Effect of dilutive securities:
 
 
 
 
 

Employee stock options and restricted common shares
—

 
1,093

 
728

Contingently issuable shares
—

 
—

 
125

Denominator for diluted (loss) earnings per share
52,230

 
54,944

 
54,460

 
 
 
 
 
 
Basic (loss) earnings per share
$
(1.46
)
 
$
0.31

 
$
0.07

Diluted (loss) earnings per share
$
(1.46
)
 
$
0.30

 
$
0.07