Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2017
Earnings Per Share [Abstract]  
Reconciliation of Basic and Diluted Weighted Average Shares Outstanding
 
 
Year Ended December 31,
(In thousands, except per share data)
 
2017
 
2016
 
2015
Net Income
 
$
59,497

 
$
23,655

 
$
30,973

 
 
 
 
 
 
 
 Weighted average common shares outstanding
 
11,021

 
10,714

 
10,551

Add: Dilutive impact of stock options
 
67

 
97

 
98

Add: Dilutive impact of restricted stock units
 
121

 
163

 
176

Diluted weighted average common shares outstanding
 
11,209

 
10,974

 
10,825

 
 
 
 
 
 
 
Earnings per share
 
 
 
 
 
 
Basic
 
$
5.40

 
$
2.21

 
$
2.94

Diluted
 
$
5.31

 
$
2.16

 
$
2.86
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share
The table below provides a summary of securities that could potentially dilute basic earnings per share in the future that were not included in the computation of diluted earnings per share because to do so would have been anti-dilutive for the period presented.
 
 
Year Ended December 31,
(In thousands)
 
2017
 
2016
 
2015
Anti-dilutive stock options
 
8

 
—

 
13

Anti-dilutive restricted stock units
 
—

 
9

 
—

Total
 
8

 
9

 
13