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Earnings Per Share (Tables)
 6 Months Ended
Jun. 30, 2017
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The computations of basic and diluted earnings (loss) per common share for three and six months ended June 30, 2017 and 2016 are as follows (in thousands, except per share amounts): 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2017
 
2016
 
2017
 
2016
Numerator:
 
 
 
 
 
 
 
Net income (loss)
$
4,493

 
$
(2,324
)
 
$
9,951

 
$
(5,017
)
 
 
 
 
 
 
 
 
Denominator:
 
 
 
 
 
 
 
Weighted-average shares outstanding – basic
53,278

 
53,411

 
53,665

 
53,278

Effect of dilutive securities:
 
 
 
 
 
 
 
Employee and director stock options and restricted common shares
1,150

 
—

 
1,025

 
—

Contingently issuable shares
761

 
—

 
380

 
—

Weighted-average shares outstanding – diluted
55,189

 
53,411

 
55,070

 
53,278

 


 
 
 
 
 
 
Basic earnings (loss) per share
$
0.08

 
$
(0.04
)
 
$
0.19

 
$
(0.09
)
Diluted earnings (loss) per share
$
0.08

 
$
(0.04
)
 
$
0.18

 
$
(0.09
)