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Earnings Per Share (Tables)
 6 Months Ended
Jun. 30, 2018
Earnings Per Share [Abstract]  
Schedule of earnings per share, basic and diluted
The following table presents the reconciliation of the numerator and denominator for calculating net income per share:
 
Second Quarter
 
First Half
(In thousands, except per share data)
2018
 
2017
 
2018
 
2017
Numerator
 
 
 
 
 
 
 
Net income - basic and diluted
$
10,846

 
$
1,632

 
$
18,068

 
$
649

 
 
 
 
 
 
 
 
Denominator
 
 
 
 
 
 
 
Weighted average common shares outstanding - basic
89,703

 
84,653

 
89,400

 
84,404

Dilutive effect of stock options and restricted stock awards
2,823

 
2,662

 
2,730

 
2,695

Dilutive effect of 2021 Convertible Notes
1,265

 
—

 
636

 
—

Weighted average common shares outstanding - diluted
93,791

 
87,315

 
92,766

 
87,099

 
 
 
 
 
 
 
 
Income per common share
 
 
 
 
 
 
 
Basic
$
0.12

 
$
0.02

 
$
0.20

 
$
0.01

Diluted
$
0.12

 
$
0.02

 
$
0.19

 
$
0.01
Schedule of diluted net income (loss) per share
We excluded the following weighted-average potential shares from the calculations of diluted net income per share during the applicable periods because their inclusion would have been anti-dilutive:
 
Second Quarter
 
First Half
(In thousands)
2018
 
2017
 
2018
 
2017
Stock options and restricted stock awards
1,173

 
2,464

 
1,412

 
2,381

2017 Convertible Notes
—

 
7,569

 
—

 
7,569

2021 Convertible Notes
—

 
—

 
—

 
—